diff --git a/.changeset/fix-decimal-varnames.md b/.changeset/fix-decimal-varnames.md
new file mode 100644
index 0000000000..9cc1de72c4
--- /dev/null
+++ b/.changeset/fix-decimal-varnames.md
@@ -0,0 +1,5 @@
+---
+"@hey-api/openapi-ts": patch
+---
+
+**fix**: preserve decimal-looking enum varnames as quoted string property keys instead of coercing to numeric literals, preventing runtime data loss (e.g. trailing zeros) and key collisions
diff --git a/packages/openapi-ts-tests/main/test/__snapshots__/2.0.x/enum-names-values-javascript-PascalCase/index.ts b/packages/openapi-ts-tests/main/test/__snapshots__/2.0.x/enum-names-values-javascript-PascalCase/index.ts
index e6f33b03a0..1a515a4506 100644
--- a/packages/openapi-ts-tests/main/test/__snapshots__/2.0.x/enum-names-values-javascript-PascalCase/index.ts
+++ b/packages/openapi-ts-tests/main/test/__snapshots__/2.0.x/enum-names-values-javascript-PascalCase/index.ts
@@ -1,3 +1,3 @@
 // This file is auto-generated by @hey-api/openapi-ts
 
-export { _110, Arrays, type ClientOptions, Foo, MyFoo, MyFoo2, Numbers } from './types.gen';
+export { _110, Arrays, type ClientOptions, DecimalVarnames, Foo, MyFoo, MyFoo2, Numbers } from './types.gen';
diff --git a/packages/openapi-ts-tests/main/test/__snapshots__/2.0.x/enum-names-values-javascript-PascalCase/types.gen.ts b/packages/openapi-ts-tests/main/test/__snapshots__/2.0.x/enum-names-values-javascript-PascalCase/types.gen.ts
index d3ae11f34c..6bd42e6b44 100644
--- a/packages/openapi-ts-tests/main/test/__snapshots__/2.0.x/enum-names-values-javascript-PascalCase/types.gen.ts
+++ b/packages/openapi-ts-tests/main/test/__snapshots__/2.0.x/enum-names-values-javascript-PascalCase/types.gen.ts
@@ -44,3 +44,20 @@ export const Arrays = {
 } as const;
 
 export type Arrays = typeof Arrays[keyof typeof Arrays];
+
+export const DecimalVarnames = {
+    /**
+     * 101.147
+     */
+    101147: 'FM',
+    /**
+     * 90.20
+     */
+    9020: 'PS',
+    /**
+     * 90.35
+     */
+    9035: 'B/ILT'
+} as const;
+
+export type DecimalVarnames = typeof DecimalVarnames[keyof typeof DecimalVarnames];
diff --git a/packages/openapi-ts-tests/main/test/__snapshots__/2.0.x/enum-names-values-javascript-SCREAMING_SNAKE_CASE/index.ts b/packages/openapi-ts-tests/main/test/__snapshots__/2.0.x/enum-names-values-javascript-SCREAMING_SNAKE_CASE/index.ts
index e6f33b03a0..1a515a4506 100644
--- a/packages/openapi-ts-tests/main/test/__snapshots__/2.0.x/enum-names-values-javascript-SCREAMING_SNAKE_CASE/index.ts
+++ b/packages/openapi-ts-tests/main/test/__snapshots__/2.0.x/enum-names-values-javascript-SCREAMING_SNAKE_CASE/index.ts
@@ -1,3 +1,3 @@
 // This file is auto-generated by @hey-api/openapi-ts
 
-export { _110, Arrays, type ClientOptions, Foo, MyFoo, MyFoo2, Numbers } from './types.gen';
+export { _110, Arrays, type ClientOptions, DecimalVarnames, Foo, MyFoo, MyFoo2, Numbers } from './types.gen';
diff --git a/packages/openapi-ts-tests/main/test/__snapshots__/2.0.x/enum-names-values-javascript-SCREAMING_SNAKE_CASE/types.gen.ts b/packages/openapi-ts-tests/main/test/__snapshots__/2.0.x/enum-names-values-javascript-SCREAMING_SNAKE_CASE/types.gen.ts
index 0a81f8f373..d4c6586ff3 100644
--- a/packages/openapi-ts-tests/main/test/__snapshots__/2.0.x/enum-names-values-javascript-SCREAMING_SNAKE_CASE/types.gen.ts
+++ b/packages/openapi-ts-tests/main/test/__snapshots__/2.0.x/enum-names-values-javascript-SCREAMING_SNAKE_CASE/types.gen.ts
@@ -44,3 +44,20 @@ export const Arrays = {
 } as const;
 
 export type Arrays = typeof Arrays[keyof typeof Arrays];
+
+export const DecimalVarnames = {
+    /**
+     * 101.147
+     */
+    '101_147': 'FM',
+    /**
+     * 90.20
+     */
+    '90_20': 'PS',
+    /**
+     * 90.35
+     */
+    '90_35': 'B/ILT'
+} as const;
+
+export type DecimalVarnames = typeof DecimalVarnames[keyof typeof DecimalVarnames];
diff --git a/packages/openapi-ts-tests/main/test/__snapshots__/2.0.x/enum-names-values-javascript-camelCase/index.ts b/packages/openapi-ts-tests/main/test/__snapshots__/2.0.x/enum-names-values-javascript-camelCase/index.ts
index e6f33b03a0..1a515a4506 100644
--- a/packages/openapi-ts-tests/main/test/__snapshots__/2.0.x/enum-names-values-javascript-camelCase/index.ts
+++ b/packages/openapi-ts-tests/main/test/__snapshots__/2.0.x/enum-names-values-javascript-camelCase/index.ts
@@ -1,3 +1,3 @@
 // This file is auto-generated by @hey-api/openapi-ts
 
-export { _110, Arrays, type ClientOptions, Foo, MyFoo, MyFoo2, Numbers } from './types.gen';
+export { _110, Arrays, type ClientOptions, DecimalVarnames, Foo, MyFoo, MyFoo2, Numbers } from './types.gen';
diff --git a/packages/openapi-ts-tests/main/test/__snapshots__/2.0.x/enum-names-values-javascript-camelCase/types.gen.ts b/packages/openapi-ts-tests/main/test/__snapshots__/2.0.x/enum-names-values-javascript-camelCase/types.gen.ts
index 42fbe692fa..f5a2b05921 100644
--- a/packages/openapi-ts-tests/main/test/__snapshots__/2.0.x/enum-names-values-javascript-camelCase/types.gen.ts
+++ b/packages/openapi-ts-tests/main/test/__snapshots__/2.0.x/enum-names-values-javascript-camelCase/types.gen.ts
@@ -44,3 +44,20 @@ export const Arrays = {
 } as const;
 
 export type Arrays = typeof Arrays[keyof typeof Arrays];
+
+export const DecimalVarnames = {
+    /**
+     * 101.147
+     */
+    101147: 'FM',
+    /**
+     * 90.20
+     */
+    9020: 'PS',
+    /**
+     * 90.35
+     */
+    9035: 'B/ILT'
+} as const;
+
+export type DecimalVarnames = typeof DecimalVarnames[keyof typeof DecimalVarnames];
diff --git a/packages/openapi-ts-tests/main/test/__snapshots__/2.0.x/enum-names-values-javascript-preserve/index.ts b/packages/openapi-ts-tests/main/test/__snapshots__/2.0.x/enum-names-values-javascript-preserve/index.ts
index e6f33b03a0..1a515a4506 100644
--- a/packages/openapi-ts-tests/main/test/__snapshots__/2.0.x/enum-names-values-javascript-preserve/index.ts
+++ b/packages/openapi-ts-tests/main/test/__snapshots__/2.0.x/enum-names-values-javascript-preserve/index.ts
@@ -1,3 +1,3 @@
 // This file is auto-generated by @hey-api/openapi-ts
 
-export { _110, Arrays, type ClientOptions, Foo, MyFoo, MyFoo2, Numbers } from './types.gen';
+export { _110, Arrays, type ClientOptions, DecimalVarnames, Foo, MyFoo, MyFoo2, Numbers } from './types.gen';
diff --git a/packages/openapi-ts-tests/main/test/__snapshots__/2.0.x/enum-names-values-javascript-preserve/types.gen.ts b/packages/openapi-ts-tests/main/test/__snapshots__/2.0.x/enum-names-values-javascript-preserve/types.gen.ts
index 6e92ca3025..b3b81152ff 100644
--- a/packages/openapi-ts-tests/main/test/__snapshots__/2.0.x/enum-names-values-javascript-preserve/types.gen.ts
+++ b/packages/openapi-ts-tests/main/test/__snapshots__/2.0.x/enum-names-values-javascript-preserve/types.gen.ts
@@ -44,3 +44,20 @@ export const Arrays = {
 } as const;
 
 export type Arrays = typeof Arrays[keyof typeof Arrays];
+
+export const DecimalVarnames = {
+    /**
+     * 101.147
+     */
+    101.147: 'FM',
+    /**
+     * 90.20
+     */
+    '90.20': 'PS',
+    /**
+     * 90.35
+     */
+    90.35: 'B/ILT'
+} as const;
+
+export type DecimalVarnames = typeof DecimalVarnames[keyof typeof DecimalVarnames];
diff --git a/packages/openapi-ts-tests/main/test/__snapshots__/2.0.x/enum-names-values-javascript-snake_case/index.ts b/packages/openapi-ts-tests/main/test/__snapshots__/2.0.x/enum-names-values-javascript-snake_case/index.ts
index e6f33b03a0..1a515a4506 100644
--- a/packages/openapi-ts-tests/main/test/__snapshots__/2.0.x/enum-names-values-javascript-snake_case/index.ts
+++ b/packages/openapi-ts-tests/main/test/__snapshots__/2.0.x/enum-names-values-javascript-snake_case/index.ts
@@ -1,3 +1,3 @@
 // This file is auto-generated by @hey-api/openapi-ts
 
-export { _110, Arrays, type ClientOptions, Foo, MyFoo, MyFoo2, Numbers } from './types.gen';
+export { _110, Arrays, type ClientOptions, DecimalVarnames, Foo, MyFoo, MyFoo2, Numbers } from './types.gen';
diff --git a/packages/openapi-ts-tests/main/test/__snapshots__/2.0.x/enum-names-values-javascript-snake_case/types.gen.ts b/packages/openapi-ts-tests/main/test/__snapshots__/2.0.x/enum-names-values-javascript-snake_case/types.gen.ts
index 4805d46f90..f41e85bf64 100644
--- a/packages/openapi-ts-tests/main/test/__snapshots__/2.0.x/enum-names-values-javascript-snake_case/types.gen.ts
+++ b/packages/openapi-ts-tests/main/test/__snapshots__/2.0.x/enum-names-values-javascript-snake_case/types.gen.ts
@@ -44,3 +44,20 @@ export const Arrays = {
 } as const;
 
 export type Arrays = typeof Arrays[keyof typeof Arrays];
+
+export const DecimalVarnames = {
+    /**
+     * 101.147
+     */
+    '101_147': 'FM',
+    /**
+     * 90.20
+     */
+    '90_20': 'PS',
+    /**
+     * 90.35
+     */
+    '90_35': 'B/ILT'
+} as const;
+
+export type DecimalVarnames = typeof DecimalVarnames[keyof typeof DecimalVarnames];
diff --git a/packages/openapi-ts-tests/main/test/__snapshots__/2.0.x/enum-names-values-typescript-PascalCase/index.ts b/packages/openapi-ts-tests/main/test/__snapshots__/2.0.x/enum-names-values-typescript-PascalCase/index.ts
index 76ebfd28c9..4062147ac1 100644
--- a/packages/openapi-ts-tests/main/test/__snapshots__/2.0.x/enum-names-values-typescript-PascalCase/index.ts
+++ b/packages/openapi-ts-tests/main/test/__snapshots__/2.0.x/enum-names-values-typescript-PascalCase/index.ts
@@ -1,3 +1,3 @@
 // This file is auto-generated by @hey-api/openapi-ts
 
-export { _110, type Arrays, type ClientOptions, type Foo, MyFoo, MyFoo2, Numbers } from './types.gen';
+export { _110, type Arrays, type ClientOptions, DecimalVarnames, type Foo, MyFoo, MyFoo2, Numbers } from './types.gen';
diff --git a/packages/openapi-ts-tests/main/test/__snapshots__/2.0.x/enum-names-values-typescript-PascalCase/types.gen.ts b/packages/openapi-ts-tests/main/test/__snapshots__/2.0.x/enum-names-values-typescript-PascalCase/types.gen.ts
index c4db836023..3eb4631890 100644
--- a/packages/openapi-ts-tests/main/test/__snapshots__/2.0.x/enum-names-values-typescript-PascalCase/types.gen.ts
+++ b/packages/openapi-ts-tests/main/test/__snapshots__/2.0.x/enum-names-values-typescript-PascalCase/types.gen.ts
@@ -37,3 +37,18 @@ export type Arrays = [
 ] | [
     'baz'
 ];
+
+export enum DecimalVarnames {
+    /**
+     * 101.147
+     */
+    _101147 = 'FM',
+    /**
+     * 90.20
+     */
+    _9020 = 'PS',
+    /**
+     * 90.35
+     */
+    _9035 = 'B/ILT'
+}
diff --git a/packages/openapi-ts-tests/main/test/__snapshots__/2.0.x/enum-names-values-typescript-SCREAMING_SNAKE_CASE/index.ts b/packages/openapi-ts-tests/main/test/__snapshots__/2.0.x/enum-names-values-typescript-SCREAMING_SNAKE_CASE/index.ts
index 76ebfd28c9..4062147ac1 100644
--- a/packages/openapi-ts-tests/main/test/__snapshots__/2.0.x/enum-names-values-typescript-SCREAMING_SNAKE_CASE/index.ts
+++ b/packages/openapi-ts-tests/main/test/__snapshots__/2.0.x/enum-names-values-typescript-SCREAMING_SNAKE_CASE/index.ts
@@ -1,3 +1,3 @@
 // This file is auto-generated by @hey-api/openapi-ts
 
-export { _110, type Arrays, type ClientOptions, type Foo, MyFoo, MyFoo2, Numbers } from './types.gen';
+export { _110, type Arrays, type ClientOptions, DecimalVarnames, type Foo, MyFoo, MyFoo2, Numbers } from './types.gen';
diff --git a/packages/openapi-ts-tests/main/test/__snapshots__/2.0.x/enum-names-values-typescript-SCREAMING_SNAKE_CASE/types.gen.ts b/packages/openapi-ts-tests/main/test/__snapshots__/2.0.x/enum-names-values-typescript-SCREAMING_SNAKE_CASE/types.gen.ts
index d29c33f61b..83b9881937 100644
--- a/packages/openapi-ts-tests/main/test/__snapshots__/2.0.x/enum-names-values-typescript-SCREAMING_SNAKE_CASE/types.gen.ts
+++ b/packages/openapi-ts-tests/main/test/__snapshots__/2.0.x/enum-names-values-typescript-SCREAMING_SNAKE_CASE/types.gen.ts
@@ -37,3 +37,18 @@ export type Arrays = [
 ] | [
     'baz'
 ];
+
+export enum DecimalVarnames {
+    /**
+     * 101.147
+     */
+    '101_147' = 'FM',
+    /**
+     * 90.20
+     */
+    '90_20' = 'PS',
+    /**
+     * 90.35
+     */
+    '90_35' = 'B/ILT'
+}
diff --git a/packages/openapi-ts-tests/main/test/__snapshots__/2.0.x/enum-names-values-typescript-camelCase/index.ts b/packages/openapi-ts-tests/main/test/__snapshots__/2.0.x/enum-names-values-typescript-camelCase/index.ts
index 76ebfd28c9..4062147ac1 100644
--- a/packages/openapi-ts-tests/main/test/__snapshots__/2.0.x/enum-names-values-typescript-camelCase/index.ts
+++ b/packages/openapi-ts-tests/main/test/__snapshots__/2.0.x/enum-names-values-typescript-camelCase/index.ts
@@ -1,3 +1,3 @@
 // This file is auto-generated by @hey-api/openapi-ts
 
-export { _110, type Arrays, type ClientOptions, type Foo, MyFoo, MyFoo2, Numbers } from './types.gen';
+export { _110, type Arrays, type ClientOptions, DecimalVarnames, type Foo, MyFoo, MyFoo2, Numbers } from './types.gen';
diff --git a/packages/openapi-ts-tests/main/test/__snapshots__/2.0.x/enum-names-values-typescript-camelCase/types.gen.ts b/packages/openapi-ts-tests/main/test/__snapshots__/2.0.x/enum-names-values-typescript-camelCase/types.gen.ts
index be7cbd0e5b..473677a676 100644
--- a/packages/openapi-ts-tests/main/test/__snapshots__/2.0.x/enum-names-values-typescript-camelCase/types.gen.ts
+++ b/packages/openapi-ts-tests/main/test/__snapshots__/2.0.x/enum-names-values-typescript-camelCase/types.gen.ts
@@ -37,3 +37,18 @@ export type Arrays = [
 ] | [
     'baz'
 ];
+
+export enum DecimalVarnames {
+    /**
+     * 101.147
+     */
+    _101147 = 'FM',
+    /**
+     * 90.20
+     */
+    _9020 = 'PS',
+    /**
+     * 90.35
+     */
+    _9035 = 'B/ILT'
+}
diff --git a/packages/openapi-ts-tests/main/test/__snapshots__/2.0.x/enum-names-values-typescript-const/index.ts b/packages/openapi-ts-tests/main/test/__snapshots__/2.0.x/enum-names-values-typescript-const/index.ts
index 76ebfd28c9..4062147ac1 100644
--- a/packages/openapi-ts-tests/main/test/__snapshots__/2.0.x/enum-names-values-typescript-const/index.ts
+++ b/packages/openapi-ts-tests/main/test/__snapshots__/2.0.x/enum-names-values-typescript-const/index.ts
@@ -1,3 +1,3 @@
 // This file is auto-generated by @hey-api/openapi-ts
 
-export { _110, type Arrays, type ClientOptions, type Foo, MyFoo, MyFoo2, Numbers } from './types.gen';
+export { _110, type Arrays, type ClientOptions, DecimalVarnames, type Foo, MyFoo, MyFoo2, Numbers } from './types.gen';
diff --git a/packages/openapi-ts-tests/main/test/__snapshots__/2.0.x/enum-names-values-typescript-const/types.gen.ts b/packages/openapi-ts-tests/main/test/__snapshots__/2.0.x/enum-names-values-typescript-const/types.gen.ts
index bbcdebda61..9d0b39ff6c 100644
--- a/packages/openapi-ts-tests/main/test/__snapshots__/2.0.x/enum-names-values-typescript-const/types.gen.ts
+++ b/packages/openapi-ts-tests/main/test/__snapshots__/2.0.x/enum-names-values-typescript-const/types.gen.ts
@@ -37,3 +37,18 @@ export type Arrays = [
 ] | [
     'baz'
 ];
+
+export const enum DecimalVarnames {
+    /**
+     * 101.147
+     */
+    _101147 = 'FM',
+    /**
+     * 90.20
+     */
+    _9020 = 'PS',
+    /**
+     * 90.35
+     */
+    _9035 = 'B/ILT'
+}
diff --git a/packages/openapi-ts-tests/main/test/__snapshots__/2.0.x/enum-names-values-typescript-preserve/index.ts b/packages/openapi-ts-tests/main/test/__snapshots__/2.0.x/enum-names-values-typescript-preserve/index.ts
index 76ebfd28c9..4062147ac1 100644
--- a/packages/openapi-ts-tests/main/test/__snapshots__/2.0.x/enum-names-values-typescript-preserve/index.ts
+++ b/packages/openapi-ts-tests/main/test/__snapshots__/2.0.x/enum-names-values-typescript-preserve/index.ts
@@ -1,3 +1,3 @@
 // This file is auto-generated by @hey-api/openapi-ts
 
-export { _110, type Arrays, type ClientOptions, type Foo, MyFoo, MyFoo2, Numbers } from './types.gen';
+export { _110, type Arrays, type ClientOptions, DecimalVarnames, type Foo, MyFoo, MyFoo2, Numbers } from './types.gen';
diff --git a/packages/openapi-ts-tests/main/test/__snapshots__/2.0.x/enum-names-values-typescript-preserve/types.gen.ts b/packages/openapi-ts-tests/main/test/__snapshots__/2.0.x/enum-names-values-typescript-preserve/types.gen.ts
index 57e45fac7a..f63c7765a3 100644
--- a/packages/openapi-ts-tests/main/test/__snapshots__/2.0.x/enum-names-values-typescript-preserve/types.gen.ts
+++ b/packages/openapi-ts-tests/main/test/__snapshots__/2.0.x/enum-names-values-typescript-preserve/types.gen.ts
@@ -37,3 +37,18 @@ export type Arrays = [
 ] | [
     'baz'
 ];
+
+export enum DecimalVarnames {
+    /**
+     * 101.147
+     */
+    '_101.147' = 'FM',
+    /**
+     * 90.20
+     */
+    '_90.20' = 'PS',
+    /**
+     * 90.35
+     */
+    '_90.35' = 'B/ILT'
+}
diff --git a/packages/openapi-ts-tests/main/test/__snapshots__/2.0.x/enum-names-values-typescript-snake_case/index.ts b/packages/openapi-ts-tests/main/test/__snapshots__/2.0.x/enum-names-values-typescript-snake_case/index.ts
index 76ebfd28c9..4062147ac1 100644
--- a/packages/openapi-ts-tests/main/test/__snapshots__/2.0.x/enum-names-values-typescript-snake_case/index.ts
+++ b/packages/openapi-ts-tests/main/test/__snapshots__/2.0.x/enum-names-values-typescript-snake_case/index.ts
@@ -1,3 +1,3 @@
 // This file is auto-generated by @hey-api/openapi-ts
 
-export { _110, type Arrays, type ClientOptions, type Foo, MyFoo, MyFoo2, Numbers } from './types.gen';
+export { _110, type Arrays, type ClientOptions, DecimalVarnames, type Foo, MyFoo, MyFoo2, Numbers } from './types.gen';
diff --git a/packages/openapi-ts-tests/main/test/__snapshots__/2.0.x/enum-names-values-typescript-snake_case/types.gen.ts b/packages/openapi-ts-tests/main/test/__snapshots__/2.0.x/enum-names-values-typescript-snake_case/types.gen.ts
index 3d87fcc64d..cf0731528d 100644
--- a/packages/openapi-ts-tests/main/test/__snapshots__/2.0.x/enum-names-values-typescript-snake_case/types.gen.ts
+++ b/packages/openapi-ts-tests/main/test/__snapshots__/2.0.x/enum-names-values-typescript-snake_case/types.gen.ts
@@ -37,3 +37,18 @@ export type Arrays = [
 ] | [
     'baz'
 ];
+
+export enum DecimalVarnames {
+    /**
+     * 101.147
+     */
+    '101_147' = 'FM',
+    /**
+     * 90.20
+     */
+    '90_20' = 'PS',
+    /**
+     * 90.35
+     */
+    '90_35' = 'B/ILT'
+}
diff --git a/packages/openapi-ts-tests/main/test/__snapshots__/2.0.x/enum-names-values/index.ts b/packages/openapi-ts-tests/main/test/__snapshots__/2.0.x/enum-names-values/index.ts
index 50e8edca31..d8c51819dd 100644
--- a/packages/openapi-ts-tests/main/test/__snapshots__/2.0.x/enum-names-values/index.ts
+++ b/packages/openapi-ts-tests/main/test/__snapshots__/2.0.x/enum-names-values/index.ts
@@ -1,3 +1,3 @@
 // This file is auto-generated by @hey-api/openapi-ts
 
-export type { _110, Arrays, ClientOptions, Foo, MyFoo, MyFoo2, Numbers } from './types.gen';
+export type { _110, Arrays, ClientOptions, DecimalVarnames, Foo, MyFoo, MyFoo2, Numbers } from './types.gen';
diff --git a/packages/openapi-ts-tests/main/test/__snapshots__/2.0.x/enum-names-values/types.gen.ts b/packages/openapi-ts-tests/main/test/__snapshots__/2.0.x/enum-names-values/types.gen.ts
index 6ec2488090..34d46d2e08 100644
--- a/packages/openapi-ts-tests/main/test/__snapshots__/2.0.x/enum-names-values/types.gen.ts
+++ b/packages/openapi-ts-tests/main/test/__snapshots__/2.0.x/enum-names-values/types.gen.ts
@@ -21,3 +21,5 @@ export type Arrays = [
 ] | [
     'baz'
 ];
+
+export type DecimalVarnames = 'FM' | 'PS' | 'B/ILT';
diff --git a/packages/openapi-ts-tests/main/test/__snapshots__/3.0.x/enum-names-values-javascript-PascalCase/index.ts b/packages/openapi-ts-tests/main/test/__snapshots__/3.0.x/enum-names-values-javascript-PascalCase/index.ts
index e6f33b03a0..1a515a4506 100644
--- a/packages/openapi-ts-tests/main/test/__snapshots__/3.0.x/enum-names-values-javascript-PascalCase/index.ts
+++ b/packages/openapi-ts-tests/main/test/__snapshots__/3.0.x/enum-names-values-javascript-PascalCase/index.ts
@@ -1,3 +1,3 @@
 // This file is auto-generated by @hey-api/openapi-ts
 
-export { _110, Arrays, type ClientOptions, Foo, MyFoo, MyFoo2, Numbers } from './types.gen';
+export { _110, Arrays, type ClientOptions, DecimalVarnames, Foo, MyFoo, MyFoo2, Numbers } from './types.gen';
diff --git a/packages/openapi-ts-tests/main/test/__snapshots__/3.0.x/enum-names-values-javascript-PascalCase/types.gen.ts b/packages/openapi-ts-tests/main/test/__snapshots__/3.0.x/enum-names-values-javascript-PascalCase/types.gen.ts
index 1d30f67fff..64cb8ead1b 100644
--- a/packages/openapi-ts-tests/main/test/__snapshots__/3.0.x/enum-names-values-javascript-PascalCase/types.gen.ts
+++ b/packages/openapi-ts-tests/main/test/__snapshots__/3.0.x/enum-names-values-javascript-PascalCase/types.gen.ts
@@ -45,3 +45,20 @@ export const Arrays = {
 } as const;
 
 export type Arrays = typeof Arrays[keyof typeof Arrays];
+
+export const DecimalVarnames = {
+    /**
+     * 101.147
+     */
+    101147: 'FM',
+    /**
+     * 90.20
+     */
+    9020: 'PS',
+    /**
+     * 90.35
+     */
+    9035: 'B/ILT'
+} as const;
+
+export type DecimalVarnames = typeof DecimalVarnames[keyof typeof DecimalVarnames];
diff --git a/packages/openapi-ts-tests/main/test/__snapshots__/3.0.x/enum-names-values-javascript-SCREAMING_SNAKE_CASE/index.ts b/packages/openapi-ts-tests/main/test/__snapshots__/3.0.x/enum-names-values-javascript-SCREAMING_SNAKE_CASE/index.ts
index e6f33b03a0..1a515a4506 100644
--- a/packages/openapi-ts-tests/main/test/__snapshots__/3.0.x/enum-names-values-javascript-SCREAMING_SNAKE_CASE/index.ts
+++ b/packages/openapi-ts-tests/main/test/__snapshots__/3.0.x/enum-names-values-javascript-SCREAMING_SNAKE_CASE/index.ts
@@ -1,3 +1,3 @@
 // This file is auto-generated by @hey-api/openapi-ts
 
-export { _110, Arrays, type ClientOptions, Foo, MyFoo, MyFoo2, Numbers } from './types.gen';
+export { _110, Arrays, type ClientOptions, DecimalVarnames, Foo, MyFoo, MyFoo2, Numbers } from './types.gen';
diff --git a/packages/openapi-ts-tests/main/test/__snapshots__/3.0.x/enum-names-values-javascript-SCREAMING_SNAKE_CASE/types.gen.ts b/packages/openapi-ts-tests/main/test/__snapshots__/3.0.x/enum-names-values-javascript-SCREAMING_SNAKE_CASE/types.gen.ts
index f20bb191c4..1fd035eedf 100644
--- a/packages/openapi-ts-tests/main/test/__snapshots__/3.0.x/enum-names-values-javascript-SCREAMING_SNAKE_CASE/types.gen.ts
+++ b/packages/openapi-ts-tests/main/test/__snapshots__/3.0.x/enum-names-values-javascript-SCREAMING_SNAKE_CASE/types.gen.ts
@@ -45,3 +45,20 @@ export const Arrays = {
 } as const;
 
 export type Arrays = typeof Arrays[keyof typeof Arrays];
+
+export const DecimalVarnames = {
+    /**
+     * 101.147
+     */
+    '101_147': 'FM',
+    /**
+     * 90.20
+     */
+    '90_20': 'PS',
+    /**
+     * 90.35
+     */
+    '90_35': 'B/ILT'
+} as const;
+
+export type DecimalVarnames = typeof DecimalVarnames[keyof typeof DecimalVarnames];
diff --git a/packages/openapi-ts-tests/main/test/__snapshots__/3.0.x/enum-names-values-javascript-camelCase/index.ts b/packages/openapi-ts-tests/main/test/__snapshots__/3.0.x/enum-names-values-javascript-camelCase/index.ts
index e6f33b03a0..1a515a4506 100644
--- a/packages/openapi-ts-tests/main/test/__snapshots__/3.0.x/enum-names-values-javascript-camelCase/index.ts
+++ b/packages/openapi-ts-tests/main/test/__snapshots__/3.0.x/enum-names-values-javascript-camelCase/index.ts
@@ -1,3 +1,3 @@
 // This file is auto-generated by @hey-api/openapi-ts
 
-export { _110, Arrays, type ClientOptions, Foo, MyFoo, MyFoo2, Numbers } from './types.gen';
+export { _110, Arrays, type ClientOptions, DecimalVarnames, Foo, MyFoo, MyFoo2, Numbers } from './types.gen';
diff --git a/packages/openapi-ts-tests/main/test/__snapshots__/3.0.x/enum-names-values-javascript-camelCase/types.gen.ts b/packages/openapi-ts-tests/main/test/__snapshots__/3.0.x/enum-names-values-javascript-camelCase/types.gen.ts
index 50065b8923..fe9c2e4321 100644
--- a/packages/openapi-ts-tests/main/test/__snapshots__/3.0.x/enum-names-values-javascript-camelCase/types.gen.ts
+++ b/packages/openapi-ts-tests/main/test/__snapshots__/3.0.x/enum-names-values-javascript-camelCase/types.gen.ts
@@ -45,3 +45,20 @@ export const Arrays = {
 } as const;
 
 export type Arrays = typeof Arrays[keyof typeof Arrays];
+
+export const DecimalVarnames = {
+    /**
+     * 101.147
+     */
+    101147: 'FM',
+    /**
+     * 90.20
+     */
+    9020: 'PS',
+    /**
+     * 90.35
+     */
+    9035: 'B/ILT'
+} as const;
+
+export type DecimalVarnames = typeof DecimalVarnames[keyof typeof DecimalVarnames];
diff --git a/packages/openapi-ts-tests/main/test/__snapshots__/3.0.x/enum-names-values-javascript-ignore-null/index.ts b/packages/openapi-ts-tests/main/test/__snapshots__/3.0.x/enum-names-values-javascript-ignore-null/index.ts
index e6f33b03a0..1a515a4506 100644
--- a/packages/openapi-ts-tests/main/test/__snapshots__/3.0.x/enum-names-values-javascript-ignore-null/index.ts
+++ b/packages/openapi-ts-tests/main/test/__snapshots__/3.0.x/enum-names-values-javascript-ignore-null/index.ts
@@ -1,3 +1,3 @@
 // This file is auto-generated by @hey-api/openapi-ts
 
-export { _110, Arrays, type ClientOptions, Foo, MyFoo, MyFoo2, Numbers } from './types.gen';
+export { _110, Arrays, type ClientOptions, DecimalVarnames, Foo, MyFoo, MyFoo2, Numbers } from './types.gen';
diff --git a/packages/openapi-ts-tests/main/test/__snapshots__/3.0.x/enum-names-values-javascript-ignore-null/types.gen.ts b/packages/openapi-ts-tests/main/test/__snapshots__/3.0.x/enum-names-values-javascript-ignore-null/types.gen.ts
index c92f919add..9679fd2ffc 100644
--- a/packages/openapi-ts-tests/main/test/__snapshots__/3.0.x/enum-names-values-javascript-ignore-null/types.gen.ts
+++ b/packages/openapi-ts-tests/main/test/__snapshots__/3.0.x/enum-names-values-javascript-ignore-null/types.gen.ts
@@ -44,3 +44,20 @@ export const Arrays = {
 } as const;
 
 export type Arrays = typeof Arrays[keyof typeof Arrays];
+
+export const DecimalVarnames = {
+    /**
+     * 101.147
+     */
+    101.147: 'FM',
+    /**
+     * 90.20
+     */
+    '90.20': 'PS',
+    /**
+     * 90.35
+     */
+    90.35: 'B/ILT'
+} as const;
+
+export type DecimalVarnames = typeof DecimalVarnames[keyof typeof DecimalVarnames];
diff --git a/packages/openapi-ts-tests/main/test/__snapshots__/3.0.x/enum-names-values-javascript-preserve/index.ts b/packages/openapi-ts-tests/main/test/__snapshots__/3.0.x/enum-names-values-javascript-preserve/index.ts
index e6f33b03a0..1a515a4506 100644
--- a/packages/openapi-ts-tests/main/test/__snapshots__/3.0.x/enum-names-values-javascript-preserve/index.ts
+++ b/packages/openapi-ts-tests/main/test/__snapshots__/3.0.x/enum-names-values-javascript-preserve/index.ts
@@ -1,3 +1,3 @@
 // This file is auto-generated by @hey-api/openapi-ts
 
-export { _110, Arrays, type ClientOptions, Foo, MyFoo, MyFoo2, Numbers } from './types.gen';
+export { _110, Arrays, type ClientOptions, DecimalVarnames, Foo, MyFoo, MyFoo2, Numbers } from './types.gen';
diff --git a/packages/openapi-ts-tests/main/test/__snapshots__/3.0.x/enum-names-values-javascript-preserve/types.gen.ts b/packages/openapi-ts-tests/main/test/__snapshots__/3.0.x/enum-names-values-javascript-preserve/types.gen.ts
index d131603e05..985a7e4ce4 100644
--- a/packages/openapi-ts-tests/main/test/__snapshots__/3.0.x/enum-names-values-javascript-preserve/types.gen.ts
+++ b/packages/openapi-ts-tests/main/test/__snapshots__/3.0.x/enum-names-values-javascript-preserve/types.gen.ts
@@ -45,3 +45,20 @@ export const Arrays = {
 } as const;
 
 export type Arrays = typeof Arrays[keyof typeof Arrays];
+
+export const DecimalVarnames = {
+    /**
+     * 101.147
+     */
+    101.147: 'FM',
+    /**
+     * 90.20
+     */
+    '90.20': 'PS',
+    /**
+     * 90.35
+     */
+    90.35: 'B/ILT'
+} as const;
+
+export type DecimalVarnames = typeof DecimalVarnames[keyof typeof DecimalVarnames];
diff --git a/packages/openapi-ts-tests/main/test/__snapshots__/3.0.x/enum-names-values-javascript-snake_case/index.ts b/packages/openapi-ts-tests/main/test/__snapshots__/3.0.x/enum-names-values-javascript-snake_case/index.ts
index e6f33b03a0..1a515a4506 100644
--- a/packages/openapi-ts-tests/main/test/__snapshots__/3.0.x/enum-names-values-javascript-snake_case/index.ts
+++ b/packages/openapi-ts-tests/main/test/__snapshots__/3.0.x/enum-names-values-javascript-snake_case/index.ts
@@ -1,3 +1,3 @@
 // This file is auto-generated by @hey-api/openapi-ts
 
-export { _110, Arrays, type ClientOptions, Foo, MyFoo, MyFoo2, Numbers } from './types.gen';
+export { _110, Arrays, type ClientOptions, DecimalVarnames, Foo, MyFoo, MyFoo2, Numbers } from './types.gen';
diff --git a/packages/openapi-ts-tests/main/test/__snapshots__/3.0.x/enum-names-values-javascript-snake_case/types.gen.ts b/packages/openapi-ts-tests/main/test/__snapshots__/3.0.x/enum-names-values-javascript-snake_case/types.gen.ts
index d815d6b774..c92cc60142 100644
--- a/packages/openapi-ts-tests/main/test/__snapshots__/3.0.x/enum-names-values-javascript-snake_case/types.gen.ts
+++ b/packages/openapi-ts-tests/main/test/__snapshots__/3.0.x/enum-names-values-javascript-snake_case/types.gen.ts
@@ -45,3 +45,20 @@ export const Arrays = {
 } as const;
 
 export type Arrays = typeof Arrays[keyof typeof Arrays];
+
+export const DecimalVarnames = {
+    /**
+     * 101.147
+     */
+    '101_147': 'FM',
+    /**
+     * 90.20
+     */
+    '90_20': 'PS',
+    /**
+     * 90.35
+     */
+    '90_35': 'B/ILT'
+} as const;
+
+export type DecimalVarnames = typeof DecimalVarnames[keyof typeof DecimalVarnames];
diff --git a/packages/openapi-ts-tests/main/test/__snapshots__/3.0.x/enum-names-values-typescript-PascalCase/index.ts b/packages/openapi-ts-tests/main/test/__snapshots__/3.0.x/enum-names-values-typescript-PascalCase/index.ts
index 76ebfd28c9..4062147ac1 100644
--- a/packages/openapi-ts-tests/main/test/__snapshots__/3.0.x/enum-names-values-typescript-PascalCase/index.ts
+++ b/packages/openapi-ts-tests/main/test/__snapshots__/3.0.x/enum-names-values-typescript-PascalCase/index.ts
@@ -1,3 +1,3 @@
 // This file is auto-generated by @hey-api/openapi-ts
 
-export { _110, type Arrays, type ClientOptions, type Foo, MyFoo, MyFoo2, Numbers } from './types.gen';
+export { _110, type Arrays, type ClientOptions, DecimalVarnames, type Foo, MyFoo, MyFoo2, Numbers } from './types.gen';
diff --git a/packages/openapi-ts-tests/main/test/__snapshots__/3.0.x/enum-names-values-typescript-PascalCase/types.gen.ts b/packages/openapi-ts-tests/main/test/__snapshots__/3.0.x/enum-names-values-typescript-PascalCase/types.gen.ts
index 7f0916345d..30930a9bca 100644
--- a/packages/openapi-ts-tests/main/test/__snapshots__/3.0.x/enum-names-values-typescript-PascalCase/types.gen.ts
+++ b/packages/openapi-ts-tests/main/test/__snapshots__/3.0.x/enum-names-values-typescript-PascalCase/types.gen.ts
@@ -37,3 +37,18 @@ export type Arrays = [
 ] | [
     'baz'
 ];
+
+export enum DecimalVarnames {
+    /**
+     * 101.147
+     */
+    _101147 = 'FM',
+    /**
+     * 90.20
+     */
+    _9020 = 'PS',
+    /**
+     * 90.35
+     */
+    _9035 = 'B/ILT'
+}
diff --git a/packages/openapi-ts-tests/main/test/__snapshots__/3.0.x/enum-names-values-typescript-SCREAMING_SNAKE_CASE/index.ts b/packages/openapi-ts-tests/main/test/__snapshots__/3.0.x/enum-names-values-typescript-SCREAMING_SNAKE_CASE/index.ts
index 76ebfd28c9..4062147ac1 100644
--- a/packages/openapi-ts-tests/main/test/__snapshots__/3.0.x/enum-names-values-typescript-SCREAMING_SNAKE_CASE/index.ts
+++ b/packages/openapi-ts-tests/main/test/__snapshots__/3.0.x/enum-names-values-typescript-SCREAMING_SNAKE_CASE/index.ts
@@ -1,3 +1,3 @@
 // This file is auto-generated by @hey-api/openapi-ts
 
-export { _110, type Arrays, type ClientOptions, type Foo, MyFoo, MyFoo2, Numbers } from './types.gen';
+export { _110, type Arrays, type ClientOptions, DecimalVarnames, type Foo, MyFoo, MyFoo2, Numbers } from './types.gen';
diff --git a/packages/openapi-ts-tests/main/test/__snapshots__/3.0.x/enum-names-values-typescript-SCREAMING_SNAKE_CASE/types.gen.ts b/packages/openapi-ts-tests/main/test/__snapshots__/3.0.x/enum-names-values-typescript-SCREAMING_SNAKE_CASE/types.gen.ts
index 72d21c8b5d..24e430ab97 100644
--- a/packages/openapi-ts-tests/main/test/__snapshots__/3.0.x/enum-names-values-typescript-SCREAMING_SNAKE_CASE/types.gen.ts
+++ b/packages/openapi-ts-tests/main/test/__snapshots__/3.0.x/enum-names-values-typescript-SCREAMING_SNAKE_CASE/types.gen.ts
@@ -37,3 +37,18 @@ export type Arrays = [
 ] | [
     'baz'
 ];
+
+export enum DecimalVarnames {
+    /**
+     * 101.147
+     */
+    '101_147' = 'FM',
+    /**
+     * 90.20
+     */
+    '90_20' = 'PS',
+    /**
+     * 90.35
+     */
+    '90_35' = 'B/ILT'
+}
diff --git a/packages/openapi-ts-tests/main/test/__snapshots__/3.0.x/enum-names-values-typescript-camelCase/index.ts b/packages/openapi-ts-tests/main/test/__snapshots__/3.0.x/enum-names-values-typescript-camelCase/index.ts
index 76ebfd28c9..4062147ac1 100644
--- a/packages/openapi-ts-tests/main/test/__snapshots__/3.0.x/enum-names-values-typescript-camelCase/index.ts
+++ b/packages/openapi-ts-tests/main/test/__snapshots__/3.0.x/enum-names-values-typescript-camelCase/index.ts
@@ -1,3 +1,3 @@
 // This file is auto-generated by @hey-api/openapi-ts
 
-export { _110, type Arrays, type ClientOptions, type Foo, MyFoo, MyFoo2, Numbers } from './types.gen';
+export { _110, type Arrays, type ClientOptions, DecimalVarnames, type Foo, MyFoo, MyFoo2, Numbers } from './types.gen';
diff --git a/packages/openapi-ts-tests/main/test/__snapshots__/3.0.x/enum-names-values-typescript-camelCase/types.gen.ts b/packages/openapi-ts-tests/main/test/__snapshots__/3.0.x/enum-names-values-typescript-camelCase/types.gen.ts
index ae4406721b..1258a5ff51 100644
--- a/packages/openapi-ts-tests/main/test/__snapshots__/3.0.x/enum-names-values-typescript-camelCase/types.gen.ts
+++ b/packages/openapi-ts-tests/main/test/__snapshots__/3.0.x/enum-names-values-typescript-camelCase/types.gen.ts
@@ -37,3 +37,18 @@ export type Arrays = [
 ] | [
     'baz'
 ];
+
+export enum DecimalVarnames {
+    /**
+     * 101.147
+     */
+    _101147 = 'FM',
+    /**
+     * 90.20
+     */
+    _9020 = 'PS',
+    /**
+     * 90.35
+     */
+    _9035 = 'B/ILT'
+}
diff --git a/packages/openapi-ts-tests/main/test/__snapshots__/3.0.x/enum-names-values-typescript-const/index.ts b/packages/openapi-ts-tests/main/test/__snapshots__/3.0.x/enum-names-values-typescript-const/index.ts
index 76ebfd28c9..4062147ac1 100644
--- a/packages/openapi-ts-tests/main/test/__snapshots__/3.0.x/enum-names-values-typescript-const/index.ts
+++ b/packages/openapi-ts-tests/main/test/__snapshots__/3.0.x/enum-names-values-typescript-const/index.ts
@@ -1,3 +1,3 @@
 // This file is auto-generated by @hey-api/openapi-ts
 
-export { _110, type Arrays, type ClientOptions, type Foo, MyFoo, MyFoo2, Numbers } from './types.gen';
+export { _110, type Arrays, type ClientOptions, DecimalVarnames, type Foo, MyFoo, MyFoo2, Numbers } from './types.gen';
diff --git a/packages/openapi-ts-tests/main/test/__snapshots__/3.0.x/enum-names-values-typescript-const/types.gen.ts b/packages/openapi-ts-tests/main/test/__snapshots__/3.0.x/enum-names-values-typescript-const/types.gen.ts
index 7b43908d91..395f2a979a 100644
--- a/packages/openapi-ts-tests/main/test/__snapshots__/3.0.x/enum-names-values-typescript-const/types.gen.ts
+++ b/packages/openapi-ts-tests/main/test/__snapshots__/3.0.x/enum-names-values-typescript-const/types.gen.ts
@@ -37,3 +37,18 @@ export type Arrays = [
 ] | [
     'baz'
 ];
+
+export const enum DecimalVarnames {
+    /**
+     * 101.147
+     */
+    _101147 = 'FM',
+    /**
+     * 90.20
+     */
+    _9020 = 'PS',
+    /**
+     * 90.35
+     */
+    _9035 = 'B/ILT'
+}
diff --git a/packages/openapi-ts-tests/main/test/__snapshots__/3.0.x/enum-names-values-typescript-preserve/index.ts b/packages/openapi-ts-tests/main/test/__snapshots__/3.0.x/enum-names-values-typescript-preserve/index.ts
index 76ebfd28c9..4062147ac1 100644
--- a/packages/openapi-ts-tests/main/test/__snapshots__/3.0.x/enum-names-values-typescript-preserve/index.ts
+++ b/packages/openapi-ts-tests/main/test/__snapshots__/3.0.x/enum-names-values-typescript-preserve/index.ts
@@ -1,3 +1,3 @@
 // This file is auto-generated by @hey-api/openapi-ts
 
-export { _110, type Arrays, type ClientOptions, type Foo, MyFoo, MyFoo2, Numbers } from './types.gen';
+export { _110, type Arrays, type ClientOptions, DecimalVarnames, type Foo, MyFoo, MyFoo2, Numbers } from './types.gen';
diff --git a/packages/openapi-ts-tests/main/test/__snapshots__/3.0.x/enum-names-values-typescript-preserve/types.gen.ts b/packages/openapi-ts-tests/main/test/__snapshots__/3.0.x/enum-names-values-typescript-preserve/types.gen.ts
index a4169a3d5e..cc5f64cc46 100644
--- a/packages/openapi-ts-tests/main/test/__snapshots__/3.0.x/enum-names-values-typescript-preserve/types.gen.ts
+++ b/packages/openapi-ts-tests/main/test/__snapshots__/3.0.x/enum-names-values-typescript-preserve/types.gen.ts
@@ -37,3 +37,18 @@ export type Arrays = [
 ] | [
     'baz'
 ];
+
+export enum DecimalVarnames {
+    /**
+     * 101.147
+     */
+    '_101.147' = 'FM',
+    /**
+     * 90.20
+     */
+    '_90.20' = 'PS',
+    /**
+     * 90.35
+     */
+    '_90.35' = 'B/ILT'
+}
diff --git a/packages/openapi-ts-tests/main/test/__snapshots__/3.0.x/enum-names-values-typescript-snake_case/index.ts b/packages/openapi-ts-tests/main/test/__snapshots__/3.0.x/enum-names-values-typescript-snake_case/index.ts
index 76ebfd28c9..4062147ac1 100644
--- a/packages/openapi-ts-tests/main/test/__snapshots__/3.0.x/enum-names-values-typescript-snake_case/index.ts
+++ b/packages/openapi-ts-tests/main/test/__snapshots__/3.0.x/enum-names-values-typescript-snake_case/index.ts
@@ -1,3 +1,3 @@
 // This file is auto-generated by @hey-api/openapi-ts
 
-export { _110, type Arrays, type ClientOptions, type Foo, MyFoo, MyFoo2, Numbers } from './types.gen';
+export { _110, type Arrays, type ClientOptions, DecimalVarnames, type Foo, MyFoo, MyFoo2, Numbers } from './types.gen';
diff --git a/packages/openapi-ts-tests/main/test/__snapshots__/3.0.x/enum-names-values-typescript-snake_case/types.gen.ts b/packages/openapi-ts-tests/main/test/__snapshots__/3.0.x/enum-names-values-typescript-snake_case/types.gen.ts
index c668186a7b..be65e6aa53 100644
--- a/packages/openapi-ts-tests/main/test/__snapshots__/3.0.x/enum-names-values-typescript-snake_case/types.gen.ts
+++ b/packages/openapi-ts-tests/main/test/__snapshots__/3.0.x/enum-names-values-typescript-snake_case/types.gen.ts
@@ -37,3 +37,18 @@ export type Arrays = [
 ] | [
     'baz'
 ];
+
+export enum DecimalVarnames {
+    /**
+     * 101.147
+     */
+    '101_147' = 'FM',
+    /**
+     * 90.20
+     */
+    '90_20' = 'PS',
+    /**
+     * 90.35
+     */
+    '90_35' = 'B/ILT'
+}
diff --git a/packages/openapi-ts-tests/main/test/__snapshots__/3.0.x/enum-names-values/index.ts b/packages/openapi-ts-tests/main/test/__snapshots__/3.0.x/enum-names-values/index.ts
index 50e8edca31..d8c51819dd 100644
--- a/packages/openapi-ts-tests/main/test/__snapshots__/3.0.x/enum-names-values/index.ts
+++ b/packages/openapi-ts-tests/main/test/__snapshots__/3.0.x/enum-names-values/index.ts
@@ -1,3 +1,3 @@
 // This file is auto-generated by @hey-api/openapi-ts
 
-export type { _110, Arrays, ClientOptions, Foo, MyFoo, MyFoo2, Numbers } from './types.gen';
+export type { _110, Arrays, ClientOptions, DecimalVarnames, Foo, MyFoo, MyFoo2, Numbers } from './types.gen';
diff --git a/packages/openapi-ts-tests/main/test/__snapshots__/3.0.x/enum-names-values/types.gen.ts b/packages/openapi-ts-tests/main/test/__snapshots__/3.0.x/enum-names-values/types.gen.ts
index 7bbcad881d..50f980bf92 100644
--- a/packages/openapi-ts-tests/main/test/__snapshots__/3.0.x/enum-names-values/types.gen.ts
+++ b/packages/openapi-ts-tests/main/test/__snapshots__/3.0.x/enum-names-values/types.gen.ts
@@ -21,3 +21,5 @@ export type Arrays = [
 ] | [
     'baz'
 ];
+
+export type DecimalVarnames = 'FM' | 'PS' | 'B/ILT';
diff --git a/packages/openapi-ts-tests/main/test/__snapshots__/3.1.x/enum-names-values-javascript-PascalCase/index.ts b/packages/openapi-ts-tests/main/test/__snapshots__/3.1.x/enum-names-values-javascript-PascalCase/index.ts
index 29fc485089..954b92a250 100644
--- a/packages/openapi-ts-tests/main/test/__snapshots__/3.1.x/enum-names-values-javascript-PascalCase/index.ts
+++ b/packages/openapi-ts-tests/main/test/__snapshots__/3.1.x/enum-names-values-javascript-PascalCase/index.ts
@@ -1,3 +1,3 @@
 // This file is auto-generated by @hey-api/openapi-ts
 
-export { _110, Arrays, type ClientOptions, Foo, MyFoo, MyFoo2, type MyFooRef, Numbers } from './types.gen';
+export { _110, Arrays, type ClientOptions, DecimalVarnames, Foo, MyFoo, MyFoo2, type MyFooRef, Numbers } from './types.gen';
diff --git a/packages/openapi-ts-tests/main/test/__snapshots__/3.1.x/enum-names-values-javascript-PascalCase/types.gen.ts b/packages/openapi-ts-tests/main/test/__snapshots__/3.1.x/enum-names-values-javascript-PascalCase/types.gen.ts
index 3c67387665..0122fb7916 100644
--- a/packages/openapi-ts-tests/main/test/__snapshots__/3.1.x/enum-names-values-javascript-PascalCase/types.gen.ts
+++ b/packages/openapi-ts-tests/main/test/__snapshots__/3.1.x/enum-names-values-javascript-PascalCase/types.gen.ts
@@ -46,6 +46,23 @@ export const Arrays = {
 
 export type Arrays = typeof Arrays[keyof typeof Arrays];
 
+export const DecimalVarnames = {
+    /**
+     * 101.147
+     */
+    101147: 'FM',
+    /**
+     * 90.20
+     */
+    9020: 'PS',
+    /**
+     * 90.35
+     */
+    9035: 'B/ILT'
+} as const;
+
+export type DecimalVarnames = typeof DecimalVarnames[keyof typeof DecimalVarnames];
+
 export type MyFooRef = {
     foo?: Array<MyFoo2>;
 };
diff --git a/packages/openapi-ts-tests/main/test/__snapshots__/3.1.x/enum-names-values-javascript-SCREAMING_SNAKE_CASE/index.ts b/packages/openapi-ts-tests/main/test/__snapshots__/3.1.x/enum-names-values-javascript-SCREAMING_SNAKE_CASE/index.ts
index 29fc485089..954b92a250 100644
--- a/packages/openapi-ts-tests/main/test/__snapshots__/3.1.x/enum-names-values-javascript-SCREAMING_SNAKE_CASE/index.ts
+++ b/packages/openapi-ts-tests/main/test/__snapshots__/3.1.x/enum-names-values-javascript-SCREAMING_SNAKE_CASE/index.ts
@@ -1,3 +1,3 @@
 // This file is auto-generated by @hey-api/openapi-ts
 
-export { _110, Arrays, type ClientOptions, Foo, MyFoo, MyFoo2, type MyFooRef, Numbers } from './types.gen';
+export { _110, Arrays, type ClientOptions, DecimalVarnames, Foo, MyFoo, MyFoo2, type MyFooRef, Numbers } from './types.gen';
diff --git a/packages/openapi-ts-tests/main/test/__snapshots__/3.1.x/enum-names-values-javascript-SCREAMING_SNAKE_CASE/types.gen.ts b/packages/openapi-ts-tests/main/test/__snapshots__/3.1.x/enum-names-values-javascript-SCREAMING_SNAKE_CASE/types.gen.ts
index f2ed061add..1bacdff676 100644
--- a/packages/openapi-ts-tests/main/test/__snapshots__/3.1.x/enum-names-values-javascript-SCREAMING_SNAKE_CASE/types.gen.ts
+++ b/packages/openapi-ts-tests/main/test/__snapshots__/3.1.x/enum-names-values-javascript-SCREAMING_SNAKE_CASE/types.gen.ts
@@ -46,6 +46,23 @@ export const Arrays = {
 
 export type Arrays = typeof Arrays[keyof typeof Arrays];
 
+export const DecimalVarnames = {
+    /**
+     * 101.147
+     */
+    '101_147': 'FM',
+    /**
+     * 90.20
+     */
+    '90_20': 'PS',
+    /**
+     * 90.35
+     */
+    '90_35': 'B/ILT'
+} as const;
+
+export type DecimalVarnames = typeof DecimalVarnames[keyof typeof DecimalVarnames];
+
 export type MyFooRef = {
     foo?: Array<MyFoo2>;
 };
diff --git a/packages/openapi-ts-tests/main/test/__snapshots__/3.1.x/enum-names-values-javascript-camelCase/index.ts b/packages/openapi-ts-tests/main/test/__snapshots__/3.1.x/enum-names-values-javascript-camelCase/index.ts
index 29fc485089..954b92a250 100644
--- a/packages/openapi-ts-tests/main/test/__snapshots__/3.1.x/enum-names-values-javascript-camelCase/index.ts
+++ b/packages/openapi-ts-tests/main/test/__snapshots__/3.1.x/enum-names-values-javascript-camelCase/index.ts
@@ -1,3 +1,3 @@
 // This file is auto-generated by @hey-api/openapi-ts
 
-export { _110, Arrays, type ClientOptions, Foo, MyFoo, MyFoo2, type MyFooRef, Numbers } from './types.gen';
+export { _110, Arrays, type ClientOptions, DecimalVarnames, Foo, MyFoo, MyFoo2, type MyFooRef, Numbers } from './types.gen';
diff --git a/packages/openapi-ts-tests/main/test/__snapshots__/3.1.x/enum-names-values-javascript-camelCase/types.gen.ts b/packages/openapi-ts-tests/main/test/__snapshots__/3.1.x/enum-names-values-javascript-camelCase/types.gen.ts
index 10a93a00ce..15560a1869 100644
--- a/packages/openapi-ts-tests/main/test/__snapshots__/3.1.x/enum-names-values-javascript-camelCase/types.gen.ts
+++ b/packages/openapi-ts-tests/main/test/__snapshots__/3.1.x/enum-names-values-javascript-camelCase/types.gen.ts
@@ -46,6 +46,23 @@ export const Arrays = {
 
 export type Arrays = typeof Arrays[keyof typeof Arrays];
 
+export const DecimalVarnames = {
+    /**
+     * 101.147
+     */
+    101147: 'FM',
+    /**
+     * 90.20
+     */
+    9020: 'PS',
+    /**
+     * 90.35
+     */
+    9035: 'B/ILT'
+} as const;
+
+export type DecimalVarnames = typeof DecimalVarnames[keyof typeof DecimalVarnames];
+
 export type MyFooRef = {
     foo?: Array<MyFoo2>;
 };
diff --git a/packages/openapi-ts-tests/main/test/__snapshots__/3.1.x/enum-names-values-javascript-ignore-null/index.ts b/packages/openapi-ts-tests/main/test/__snapshots__/3.1.x/enum-names-values-javascript-ignore-null/index.ts
index 29fc485089..954b92a250 100644
--- a/packages/openapi-ts-tests/main/test/__snapshots__/3.1.x/enum-names-values-javascript-ignore-null/index.ts
+++ b/packages/openapi-ts-tests/main/test/__snapshots__/3.1.x/enum-names-values-javascript-ignore-null/index.ts
@@ -1,3 +1,3 @@
 // This file is auto-generated by @hey-api/openapi-ts
 
-export { _110, Arrays, type ClientOptions, Foo, MyFoo, MyFoo2, type MyFooRef, Numbers } from './types.gen';
+export { _110, Arrays, type ClientOptions, DecimalVarnames, Foo, MyFoo, MyFoo2, type MyFooRef, Numbers } from './types.gen';
diff --git a/packages/openapi-ts-tests/main/test/__snapshots__/3.1.x/enum-names-values-javascript-ignore-null/types.gen.ts b/packages/openapi-ts-tests/main/test/__snapshots__/3.1.x/enum-names-values-javascript-ignore-null/types.gen.ts
index 27c7378767..8cdda8b5d9 100644
--- a/packages/openapi-ts-tests/main/test/__snapshots__/3.1.x/enum-names-values-javascript-ignore-null/types.gen.ts
+++ b/packages/openapi-ts-tests/main/test/__snapshots__/3.1.x/enum-names-values-javascript-ignore-null/types.gen.ts
@@ -45,6 +45,23 @@ export const Arrays = {
 
 export type Arrays = typeof Arrays[keyof typeof Arrays];
 
+export const DecimalVarnames = {
+    /**
+     * 101.147
+     */
+    101.147: 'FM',
+    /**
+     * 90.20
+     */
+    '90.20': 'PS',
+    /**
+     * 90.35
+     */
+    90.35: 'B/ILT'
+} as const;
+
+export type DecimalVarnames = typeof DecimalVarnames[keyof typeof DecimalVarnames];
+
 export type MyFooRef = {
     foo?: Array<MyFoo2>;
 };
diff --git a/packages/openapi-ts-tests/main/test/__snapshots__/3.1.x/enum-names-values-javascript-preserve/index.ts b/packages/openapi-ts-tests/main/test/__snapshots__/3.1.x/enum-names-values-javascript-preserve/index.ts
index 29fc485089..954b92a250 100644
--- a/packages/openapi-ts-tests/main/test/__snapshots__/3.1.x/enum-names-values-javascript-preserve/index.ts
+++ b/packages/openapi-ts-tests/main/test/__snapshots__/3.1.x/enum-names-values-javascript-preserve/index.ts
@@ -1,3 +1,3 @@
 // This file is auto-generated by @hey-api/openapi-ts
 
-export { _110, Arrays, type ClientOptions, Foo, MyFoo, MyFoo2, type MyFooRef, Numbers } from './types.gen';
+export { _110, Arrays, type ClientOptions, DecimalVarnames, Foo, MyFoo, MyFoo2, type MyFooRef, Numbers } from './types.gen';
diff --git a/packages/openapi-ts-tests/main/test/__snapshots__/3.1.x/enum-names-values-javascript-preserve/types.gen.ts b/packages/openapi-ts-tests/main/test/__snapshots__/3.1.x/enum-names-values-javascript-preserve/types.gen.ts
index 1a540d8799..b18cf8b6c7 100644
--- a/packages/openapi-ts-tests/main/test/__snapshots__/3.1.x/enum-names-values-javascript-preserve/types.gen.ts
+++ b/packages/openapi-ts-tests/main/test/__snapshots__/3.1.x/enum-names-values-javascript-preserve/types.gen.ts
@@ -46,6 +46,23 @@ export const Arrays = {
 
 export type Arrays = typeof Arrays[keyof typeof Arrays];
 
+export const DecimalVarnames = {
+    /**
+     * 101.147
+     */
+    101.147: 'FM',
+    /**
+     * 90.20
+     */
+    '90.20': 'PS',
+    /**
+     * 90.35
+     */
+    90.35: 'B/ILT'
+} as const;
+
+export type DecimalVarnames = typeof DecimalVarnames[keyof typeof DecimalVarnames];
+
 export type MyFooRef = {
     foo?: Array<MyFoo2>;
 };
diff --git a/packages/openapi-ts-tests/main/test/__snapshots__/3.1.x/enum-names-values-javascript-snake_case/index.ts b/packages/openapi-ts-tests/main/test/__snapshots__/3.1.x/enum-names-values-javascript-snake_case/index.ts
index 29fc485089..954b92a250 100644
--- a/packages/openapi-ts-tests/main/test/__snapshots__/3.1.x/enum-names-values-javascript-snake_case/index.ts
+++ b/packages/openapi-ts-tests/main/test/__snapshots__/3.1.x/enum-names-values-javascript-snake_case/index.ts
@@ -1,3 +1,3 @@
 // This file is auto-generated by @hey-api/openapi-ts
 
-export { _110, Arrays, type ClientOptions, Foo, MyFoo, MyFoo2, type MyFooRef, Numbers } from './types.gen';
+export { _110, Arrays, type ClientOptions, DecimalVarnames, Foo, MyFoo, MyFoo2, type MyFooRef, Numbers } from './types.gen';
diff --git a/packages/openapi-ts-tests/main/test/__snapshots__/3.1.x/enum-names-values-javascript-snake_case/types.gen.ts b/packages/openapi-ts-tests/main/test/__snapshots__/3.1.x/enum-names-values-javascript-snake_case/types.gen.ts
index 765fd48c8a..5538120b36 100644
--- a/packages/openapi-ts-tests/main/test/__snapshots__/3.1.x/enum-names-values-javascript-snake_case/types.gen.ts
+++ b/packages/openapi-ts-tests/main/test/__snapshots__/3.1.x/enum-names-values-javascript-snake_case/types.gen.ts
@@ -46,6 +46,23 @@ export const Arrays = {
 
 export type Arrays = typeof Arrays[keyof typeof Arrays];
 
+export const DecimalVarnames = {
+    /**
+     * 101.147
+     */
+    '101_147': 'FM',
+    /**
+     * 90.20
+     */
+    '90_20': 'PS',
+    /**
+     * 90.35
+     */
+    '90_35': 'B/ILT'
+} as const;
+
+export type DecimalVarnames = typeof DecimalVarnames[keyof typeof DecimalVarnames];
+
 export type MyFooRef = {
     foo?: Array<MyFoo2>;
 };
diff --git a/packages/openapi-ts-tests/main/test/__snapshots__/3.1.x/enum-names-values-typescript-PascalCase/index.ts b/packages/openapi-ts-tests/main/test/__snapshots__/3.1.x/enum-names-values-typescript-PascalCase/index.ts
index 85ccf45bd1..3a940a53cc 100644
--- a/packages/openapi-ts-tests/main/test/__snapshots__/3.1.x/enum-names-values-typescript-PascalCase/index.ts
+++ b/packages/openapi-ts-tests/main/test/__snapshots__/3.1.x/enum-names-values-typescript-PascalCase/index.ts
@@ -1,3 +1,3 @@
 // This file is auto-generated by @hey-api/openapi-ts
 
-export { _110, type Arrays, type ClientOptions, type Foo, MyFoo, MyFoo2, type MyFooRef, Numbers } from './types.gen';
+export { _110, type Arrays, type ClientOptions, DecimalVarnames, type Foo, MyFoo, MyFoo2, type MyFooRef, Numbers } from './types.gen';
diff --git a/packages/openapi-ts-tests/main/test/__snapshots__/3.1.x/enum-names-values-typescript-PascalCase/types.gen.ts b/packages/openapi-ts-tests/main/test/__snapshots__/3.1.x/enum-names-values-typescript-PascalCase/types.gen.ts
index 17261bdc85..5d8ef6132f 100644
--- a/packages/openapi-ts-tests/main/test/__snapshots__/3.1.x/enum-names-values-typescript-PascalCase/types.gen.ts
+++ b/packages/openapi-ts-tests/main/test/__snapshots__/3.1.x/enum-names-values-typescript-PascalCase/types.gen.ts
@@ -38,6 +38,21 @@ export type Arrays = [
     'baz'
 ];
 
+export enum DecimalVarnames {
+    /**
+     * 101.147
+     */
+    _101147 = 'FM',
+    /**
+     * 90.20
+     */
+    _9020 = 'PS',
+    /**
+     * 90.35
+     */
+    _9035 = 'B/ILT'
+}
+
 export type MyFooRef = {
     foo?: Array<MyFoo2>;
 };
diff --git a/packages/openapi-ts-tests/main/test/__snapshots__/3.1.x/enum-names-values-typescript-SCREAMING_SNAKE_CASE/index.ts b/packages/openapi-ts-tests/main/test/__snapshots__/3.1.x/enum-names-values-typescript-SCREAMING_SNAKE_CASE/index.ts
index 85ccf45bd1..3a940a53cc 100644
--- a/packages/openapi-ts-tests/main/test/__snapshots__/3.1.x/enum-names-values-typescript-SCREAMING_SNAKE_CASE/index.ts
+++ b/packages/openapi-ts-tests/main/test/__snapshots__/3.1.x/enum-names-values-typescript-SCREAMING_SNAKE_CASE/index.ts
@@ -1,3 +1,3 @@
 // This file is auto-generated by @hey-api/openapi-ts
 
-export { _110, type Arrays, type ClientOptions, type Foo, MyFoo, MyFoo2, type MyFooRef, Numbers } from './types.gen';
+export { _110, type Arrays, type ClientOptions, DecimalVarnames, type Foo, MyFoo, MyFoo2, type MyFooRef, Numbers } from './types.gen';
diff --git a/packages/openapi-ts-tests/main/test/__snapshots__/3.1.x/enum-names-values-typescript-SCREAMING_SNAKE_CASE/types.gen.ts b/packages/openapi-ts-tests/main/test/__snapshots__/3.1.x/enum-names-values-typescript-SCREAMING_SNAKE_CASE/types.gen.ts
index 4dadefd72e..d1d9943a93 100644
--- a/packages/openapi-ts-tests/main/test/__snapshots__/3.1.x/enum-names-values-typescript-SCREAMING_SNAKE_CASE/types.gen.ts
+++ b/packages/openapi-ts-tests/main/test/__snapshots__/3.1.x/enum-names-values-typescript-SCREAMING_SNAKE_CASE/types.gen.ts
@@ -38,6 +38,21 @@ export type Arrays = [
     'baz'
 ];
 
+export enum DecimalVarnames {
+    /**
+     * 101.147
+     */
+    '101_147' = 'FM',
+    /**
+     * 90.20
+     */
+    '90_20' = 'PS',
+    /**
+     * 90.35
+     */
+    '90_35' = 'B/ILT'
+}
+
 export type MyFooRef = {
     foo?: Array<MyFoo2>;
 };
diff --git a/packages/openapi-ts-tests/main/test/__snapshots__/3.1.x/enum-names-values-typescript-camelCase/index.ts b/packages/openapi-ts-tests/main/test/__snapshots__/3.1.x/enum-names-values-typescript-camelCase/index.ts
index 85ccf45bd1..3a940a53cc 100644
--- a/packages/openapi-ts-tests/main/test/__snapshots__/3.1.x/enum-names-values-typescript-camelCase/index.ts
+++ b/packages/openapi-ts-tests/main/test/__snapshots__/3.1.x/enum-names-values-typescript-camelCase/index.ts
@@ -1,3 +1,3 @@
 // This file is auto-generated by @hey-api/openapi-ts
 
-export { _110, type Arrays, type ClientOptions, type Foo, MyFoo, MyFoo2, type MyFooRef, Numbers } from './types.gen';
+export { _110, type Arrays, type ClientOptions, DecimalVarnames, type Foo, MyFoo, MyFoo2, type MyFooRef, Numbers } from './types.gen';
diff --git a/packages/openapi-ts-tests/main/test/__snapshots__/3.1.x/enum-names-values-typescript-camelCase/types.gen.ts b/packages/openapi-ts-tests/main/test/__snapshots__/3.1.x/enum-names-values-typescript-camelCase/types.gen.ts
index 73e0c57a97..300dea7a66 100644
--- a/packages/openapi-ts-tests/main/test/__snapshots__/3.1.x/enum-names-values-typescript-camelCase/types.gen.ts
+++ b/packages/openapi-ts-tests/main/test/__snapshots__/3.1.x/enum-names-values-typescript-camelCase/types.gen.ts
@@ -38,6 +38,21 @@ export type Arrays = [
     'baz'
 ];
 
+export enum DecimalVarnames {
+    /**
+     * 101.147
+     */
+    _101147 = 'FM',
+    /**
+     * 90.20
+     */
+    _9020 = 'PS',
+    /**
+     * 90.35
+     */
+    _9035 = 'B/ILT'
+}
+
 export type MyFooRef = {
     foo?: Array<MyFoo2>;
 };
diff --git a/packages/openapi-ts-tests/main/test/__snapshots__/3.1.x/enum-names-values-typescript-const/index.ts b/packages/openapi-ts-tests/main/test/__snapshots__/3.1.x/enum-names-values-typescript-const/index.ts
index 85ccf45bd1..3a940a53cc 100644
--- a/packages/openapi-ts-tests/main/test/__snapshots__/3.1.x/enum-names-values-typescript-const/index.ts
+++ b/packages/openapi-ts-tests/main/test/__snapshots__/3.1.x/enum-names-values-typescript-const/index.ts
@@ -1,3 +1,3 @@
 // This file is auto-generated by @hey-api/openapi-ts
 
-export { _110, type Arrays, type ClientOptions, type Foo, MyFoo, MyFoo2, type MyFooRef, Numbers } from './types.gen';
+export { _110, type Arrays, type ClientOptions, DecimalVarnames, type Foo, MyFoo, MyFoo2, type MyFooRef, Numbers } from './types.gen';
diff --git a/packages/openapi-ts-tests/main/test/__snapshots__/3.1.x/enum-names-values-typescript-const/types.gen.ts b/packages/openapi-ts-tests/main/test/__snapshots__/3.1.x/enum-names-values-typescript-const/types.gen.ts
index 18729b813e..98a95b1e52 100644
--- a/packages/openapi-ts-tests/main/test/__snapshots__/3.1.x/enum-names-values-typescript-const/types.gen.ts
+++ b/packages/openapi-ts-tests/main/test/__snapshots__/3.1.x/enum-names-values-typescript-const/types.gen.ts
@@ -38,6 +38,21 @@ export type Arrays = [
     'baz'
 ];
 
+export const enum DecimalVarnames {
+    /**
+     * 101.147
+     */
+    _101147 = 'FM',
+    /**
+     * 90.20
+     */
+    _9020 = 'PS',
+    /**
+     * 90.35
+     */
+    _9035 = 'B/ILT'
+}
+
 export type MyFooRef = {
     foo?: Array<MyFoo2>;
 };
diff --git a/packages/openapi-ts-tests/main/test/__snapshots__/3.1.x/enum-names-values-typescript-preserve/index.ts b/packages/openapi-ts-tests/main/test/__snapshots__/3.1.x/enum-names-values-typescript-preserve/index.ts
index 85ccf45bd1..3a940a53cc 100644
--- a/packages/openapi-ts-tests/main/test/__snapshots__/3.1.x/enum-names-values-typescript-preserve/index.ts
+++ b/packages/openapi-ts-tests/main/test/__snapshots__/3.1.x/enum-names-values-typescript-preserve/index.ts
@@ -1,3 +1,3 @@
 // This file is auto-generated by @hey-api/openapi-ts
 
-export { _110, type Arrays, type ClientOptions, type Foo, MyFoo, MyFoo2, type MyFooRef, Numbers } from './types.gen';
+export { _110, type Arrays, type ClientOptions, DecimalVarnames, type Foo, MyFoo, MyFoo2, type MyFooRef, Numbers } from './types.gen';
diff --git a/packages/openapi-ts-tests/main/test/__snapshots__/3.1.x/enum-names-values-typescript-preserve/types.gen.ts b/packages/openapi-ts-tests/main/test/__snapshots__/3.1.x/enum-names-values-typescript-preserve/types.gen.ts
index f9011b1e2f..64951d4290 100644
--- a/packages/openapi-ts-tests/main/test/__snapshots__/3.1.x/enum-names-values-typescript-preserve/types.gen.ts
+++ b/packages/openapi-ts-tests/main/test/__snapshots__/3.1.x/enum-names-values-typescript-preserve/types.gen.ts
@@ -38,6 +38,21 @@ export type Arrays = [
     'baz'
 ];
 
+export enum DecimalVarnames {
+    /**
+     * 101.147
+     */
+    '_101.147' = 'FM',
+    /**
+     * 90.20
+     */
+    '_90.20' = 'PS',
+    /**
+     * 90.35
+     */
+    '_90.35' = 'B/ILT'
+}
+
 export type MyFooRef = {
     foo?: Array<MyFoo2>;
 };
diff --git a/packages/openapi-ts-tests/main/test/__snapshots__/3.1.x/enum-names-values-typescript-snake_case/index.ts b/packages/openapi-ts-tests/main/test/__snapshots__/3.1.x/enum-names-values-typescript-snake_case/index.ts
index 85ccf45bd1..3a940a53cc 100644
--- a/packages/openapi-ts-tests/main/test/__snapshots__/3.1.x/enum-names-values-typescript-snake_case/index.ts
+++ b/packages/openapi-ts-tests/main/test/__snapshots__/3.1.x/enum-names-values-typescript-snake_case/index.ts
@@ -1,3 +1,3 @@
 // This file is auto-generated by @hey-api/openapi-ts
 
-export { _110, type Arrays, type ClientOptions, type Foo, MyFoo, MyFoo2, type MyFooRef, Numbers } from './types.gen';
+export { _110, type Arrays, type ClientOptions, DecimalVarnames, type Foo, MyFoo, MyFoo2, type MyFooRef, Numbers } from './types.gen';
diff --git a/packages/openapi-ts-tests/main/test/__snapshots__/3.1.x/enum-names-values-typescript-snake_case/types.gen.ts b/packages/openapi-ts-tests/main/test/__snapshots__/3.1.x/enum-names-values-typescript-snake_case/types.gen.ts
index e74fd5c76d..323f1e8709 100644
--- a/packages/openapi-ts-tests/main/test/__snapshots__/3.1.x/enum-names-values-typescript-snake_case/types.gen.ts
+++ b/packages/openapi-ts-tests/main/test/__snapshots__/3.1.x/enum-names-values-typescript-snake_case/types.gen.ts
@@ -38,6 +38,21 @@ export type Arrays = [
     'baz'
 ];
 
+export enum DecimalVarnames {
+    /**
+     * 101.147
+     */
+    '101_147' = 'FM',
+    /**
+     * 90.20
+     */
+    '90_20' = 'PS',
+    /**
+     * 90.35
+     */
+    '90_35' = 'B/ILT'
+}
+
 export type MyFooRef = {
     foo?: Array<MyFoo2>;
 };
diff --git a/packages/openapi-ts-tests/main/test/__snapshots__/3.1.x/enum-names-values/index.ts b/packages/openapi-ts-tests/main/test/__snapshots__/3.1.x/enum-names-values/index.ts
index 1ff6265c6e..d90ac69bc5 100644
--- a/packages/openapi-ts-tests/main/test/__snapshots__/3.1.x/enum-names-values/index.ts
+++ b/packages/openapi-ts-tests/main/test/__snapshots__/3.1.x/enum-names-values/index.ts
@@ -1,3 +1,3 @@
 // This file is auto-generated by @hey-api/openapi-ts
 
-export type { _110, Arrays, ClientOptions, Foo, MyFoo, MyFoo2, MyFooRef, Numbers } from './types.gen';
+export type { _110, Arrays, ClientOptions, DecimalVarnames, Foo, MyFoo, MyFoo2, MyFooRef, Numbers } from './types.gen';
diff --git a/packages/openapi-ts-tests/main/test/__snapshots__/3.1.x/enum-names-values/types.gen.ts b/packages/openapi-ts-tests/main/test/__snapshots__/3.1.x/enum-names-values/types.gen.ts
index 143540e0b8..241da3a3a3 100644
--- a/packages/openapi-ts-tests/main/test/__snapshots__/3.1.x/enum-names-values/types.gen.ts
+++ b/packages/openapi-ts-tests/main/test/__snapshots__/3.1.x/enum-names-values/types.gen.ts
@@ -22,6 +22,8 @@ export type Arrays = [
     'baz'
 ];
 
+export type DecimalVarnames = 'FM' | 'PS' | 'B/ILT';
+
 export type MyFooRef = {
     foo?: Array<MyFoo2>;
 };
diff --git a/packages/openapi-ts/src/ts-dsl/utils/name.ts b/packages/openapi-ts/src/ts-dsl/utils/name.ts
index ecb8ec171b..465c7b41a4 100644
--- a/packages/openapi-ts/src/ts-dsl/utils/name.ts
+++ b/packages/openapi-ts/src/ts-dsl/utils/name.ts
@@ -10,7 +10,15 @@ import { reserved } from './reserved';
 export const safeAccessorName = (name: string): string => {
   regexp.number.lastIndex = 0;
   if (regexp.number.test(name)) {
-    return name.startsWith('-') ? `'${name}'` : name;
+    if (name.startsWith('-')) {
+      return `'${name}'`;
+    }
+    // If Number() conversion loses precision (e.g. trailing zeros),
+    // quote the name to preserve the original string
+    if (String(Number(name)) !== name) {
+      return `'${name}'`;
+    }
+    return name;
   }
 
   regexp.typeScriptIdentifier.lastIndex = 0;
@@ -33,9 +41,16 @@ export const safePropName = (
 ): TsDsl<ts.StringLiteral | ts.NumericLiteral> | IdTsDsl => {
   regexp.number.lastIndex = 0;
   if (regexp.number.test(name)) {
-    return name.startsWith('-')
-      ? (new LiteralTsDsl(name) as TsDsl<ts.StringLiteral>)
-      : (new LiteralTsDsl(Number(name)) as TsDsl<ts.NumericLiteral>);
+    if (name.startsWith('-')) {
+      return new LiteralTsDsl(name) as TsDsl<ts.StringLiteral>;
+    }
+    const num = Number(name);
+    // If Number() conversion loses precision (e.g. trailing zeros),
+    // preserve the original string as a quoted property key
+    if (String(num) !== name) {
+      return new LiteralTsDsl(name) as TsDsl<ts.StringLiteral>;
+    }
+    return new LiteralTsDsl(num) as TsDsl<ts.NumericLiteral>;
   }
 
   regexp.typeScriptIdentifier.lastIndex = 0;
diff --git a/specs/2.0.x/enum-names-values.json b/specs/2.0.x/enum-names-values.json
index 8097b1fcac..6e681d6b46 100644
--- a/specs/2.0.x/enum-names-values.json
+++ b/specs/2.0.x/enum-names-values.json
@@ -28,6 +28,11 @@
     "Arrays": {
       "enum": [["foo"], ["bar"], ["baz"]],
       "type": "array"
+    },
+    "DecimalVarnames": {
+      "enum": ["FM", "PS", "B/ILT"],
+      "type": "string",
+      "x-enum-varnames": ["101.147", "90.20", "90.35"]
     }
   }
 }
diff --git a/specs/3.0.x/enum-names-values.json b/specs/3.0.x/enum-names-values.json
index e498cf7c5a..cd28d48007 100644
--- a/specs/3.0.x/enum-names-values.json
+++ b/specs/3.0.x/enum-names-values.json
@@ -30,6 +30,11 @@
       "Arrays": {
         "enum": [["foo"], ["bar"], ["baz"]],
         "type": "array"
+      },
+      "DecimalVarnames": {
+        "enum": ["FM", "PS", "B/ILT"],
+        "type": "string",
+        "x-enum-varnames": ["101.147", "90.20", "90.35"]
       }
     }
   }
diff --git a/specs/3.1.x/enum-names-values.yaml b/specs/3.1.x/enum-names-values.yaml
index 36ef57e853..d7be496fa3 100644
--- a/specs/3.1.x/enum-names-values.yaml
+++ b/specs/3.1.x/enum-names-values.yaml
@@ -45,6 +45,16 @@ components:
         - - bar
         - - baz
       type: array
+    DecimalVarnames:
+      enum:
+        - FM
+        - PS
+        - B/ILT
+      type: string
+      x-enum-varnames:
+        - '101.147'
+        - '90.20'
+        - '90.35'
     MyFooRef:
       type: object
       properties: