[Bug / Reliability] App unable to process requests / Auth 503 errors during server degradation

What version of the Codex App are you using (From “About Codex” dialog)?

Version 26.721.41059

What subscription do you have?

ChatGPT Plus / Team

What platform is your computer?

macOS 26.5.1 (macOS / Apple M3 Pro, 18 GB RAM)

What issue are you seeing?

When attempting to run prompts or submit tasks in the app, the backend fails to process requests and returns 503 Service Unavailable / Circuit Open errors. Attempting to sign out and re-authenticate via web or OAuth fails with Cloudflare and backend service errors.

Full Error Messages:

1. Prompt Execution Error:

unexpected status 503 Service Unavailable: Service Unavailable, url: https://chatgpt.com/backend-api/codex/responses, auth error: 503, auth error code: biscuit_baker_service_me_circuit_open

1. Re-authentication Browser Error:

request_id: 6e35a338-432f-46dd-b943-23768d382527

1. Google OAuth Login Error:

{"error":{"code":503,"message":"Service Unavailable.","param":null,"type":"cf_service_unavailable"}}

What steps can reproduce the bug?

1. Open any task or chat thread in the ChatGPT / Codex app.

1. Submit a prompt or trigger an agent task.

1. Observe 503 Service Unavailable error and biscuit_baker_service_me_circuit_open code.

1. Sign out of the desktop client and attempt to log back in via Google OAuth.

1. Observe the browser re-authentication failure.

What is the expected behavior?

The app should handle temporary server degradation gracefully with a clear error retry UI, and authentication should succeed once local credentials are presented without throwing raw circuit breaker outputs.

Additional information

1. Feedback ID uploaded via in-app command: 019f26b2-651f-71f3-a9ab-35dd7b863421

1. System setup: MacBook Pro (Apple M3 Pro, 18 GB RAM), running direct network connection without VPN.

1. Coincides with ongoing OpenAI status degradation on APIs/Codex components.