diff --git a/src/CodexAcpServer.ts b/src/CodexAcpServer.ts
index 0865c984..058ef099 100644
--- a/src/CodexAcpServer.ts
+++ b/src/CodexAcpServer.ts
@@ -168,6 +168,23 @@ export class CodexAcpServer implements acp.Agent {
     }
 
     async getOrCreateSession(request: acp.NewSessionRequest | acp.ResumeSessionRequest): Promise<[SessionId, SessionModelState, SessionModeState]> {
+        try {
+            return await this.tryCreateSession(request);
+        } catch (e) {
+            const error = e instanceof Error ? e : new Error(String(e));
+            await this.handleError(error);
+            throw e;
+        }
+    }
+
+    async handleError(e: Error){
+        if (e.message.includes("log out")) {
+            await this.runWithProcessCheck(() => this.codexAcpClient.logout());
+            throw RequestError.internalError(`${(e.message)}\n\nYou have been logged out. Please try again.`);
+        }
+    }
+
+    async tryCreateSession(request: acp.NewSessionRequest | acp.ResumeSessionRequest): Promise<[SessionId, SessionModelState, SessionModeState]> {
         await this.checkAuthorization();
         const requestedMcpServers = request.mcpServers ?? [];
         const mcpServerStartupVersion = requestedMcpServers.length > 0
diff --git a/src/__tests__/CodexACPAgent/new-session-logout.test.ts b/src/__tests__/CodexACPAgent/new-session-logout.test.ts
new file mode 100644
index 00000000..88835ef1
--- /dev/null
+++ b/src/__tests__/CodexACPAgent/new-session-logout.test.ts
@@ -0,0 +1,23 @@
+import {describe, expect, it, vi} from "vitest";
+import {createCodexMockTestFixture} from "../acp-test-utils";
+
+describe("New session logout handling", () => {
+    it("logs out when newSession fails with an error containing log out", async () => {
+        const fixture = createCodexMockTestFixture();
+        const codexAcpAgent = fixture.getCodexAcpAgent();
+        const codexAcpClient = fixture.getCodexAcpClient();
+        const codexAppServerClient = fixture.getCodexAppServerClient();
+        vi.spyOn(codexAcpClient, "authRequired").mockResolvedValue(false);
+
+        const errorMessage = `Internal error: "failed to reload config: Your access token could not be refreshed because your refresh token was already used. Please log out and sign in again."`;
+        vi.spyOn(codexAppServerClient, "threadStart").mockRejectedValue(new Error(errorMessage));
+
+        const logoutSpy = vi.spyOn(codexAcpClient, "logout").mockResolvedValue();
+
+        await expect(codexAcpAgent.newSession({cwd: "", mcpServers: []}))
+            .rejects.toMatchObject({
+                data: expect.stringContaining("You have been logged out. Please try again."),
+            });
+        expect(logoutSpy).toHaveBeenCalledOnce();
+    });
+});