diff --git a/packages/opencode/src/provider/transform.ts b/packages/opencode/src/provider/transform.ts
index 411afc81b7dd..4c084982ce82 100644
--- a/packages/opencode/src/provider/transform.ts
+++ b/packages/opencode/src/provider/transform.ts
@@ -1142,13 +1142,13 @@ export function options(input: {
 
   if (input.model.api.id.includes("gpt-5") && !input.model.api.id.includes("gpt-5-chat")) {
     if (!input.model.api.id.includes("gpt-5-pro")) {
-      result["reasoningEffort"] = "medium"
       if (
         input.model.api.npm === "@ai-sdk/openai" ||
         input.model.api.npm === "@ai-sdk/azure" ||
         input.model.api.npm === "@ai-sdk/github-copilot" ||
         input.model.api.npm === "@ai-sdk/amazon-bedrock/mantle"
       ) {
+        result["reasoningEffort"] = "medium"
         result["reasoningSummary"] = "auto"
       }
       if (input.model.api.npm === "@ai-sdk/openai" || input.model.api.npm === "@ai-sdk/amazon-bedrock/mantle") {