codex - 💡(How to fix) Fix can't change model and reasoning efforts sometimes [1 comments, 2 participants]

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openai/codex#17318Fetched 2026-04-11 06:17:53
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What version of the Codex App are you using (From “About Codex” dialog)?

26.406.31014(1395)

What subscription do you have?

Pro

What platform is your computer?

Darwin 25.3.0 arm64 arm

What issue are you seeing?

https://github.com/user-attachments/assets/94180379-41e6-4eec-9e7b-e77361dcbda3

unable to set model and reasoning effort sometimes. Not always happening, the bug is limited to be happened in a few threads, does not occur everywhere. I think this bug is appeared from 1~2 versions before the current one. I'm keep seeing this, it disappears after turning off and on but little bit annoying :)

What steps can reproduce the bug?

after a few hours of use, I see this bug, not sure about the repro.

What is the expected behavior?

able to set model and reasoning effort

Additional information

No response

extent analysis

TL;DR

The issue with being unable to set the model and reasoning effort in the Codex App may be resolved by restarting the application, as this has been reported to temporarily fix the problem.

Guidance

  • The intermittent nature of the bug suggests it might be related to a resource management or caching issue within the application.
  • To help verify the cause, try to reproduce the bug and check if it consistently occurs after a certain period of inactivity or heavy usage.
  • Consider monitoring system resources (like memory and CPU usage) while the application is running to see if there are any correlations with the bug's occurrence.
  • Since the issue disappears after restarting the application, it might be worth exploring if there's a way to programmatically or manually clear caches or reset the application's state without a full restart.

Example

No specific code example can be provided without more details on the application's internal workings or APIs.

Notes

The lack of detailed steps to reproduce the bug and the absence of error messages or logs limit the ability to provide a precise fix. The guidance is based on the information that restarting the application temporarily resolves the issue.

Recommendation

Apply workaround: Given the temporary fix provided by restarting the application, and without a clear indication of a fixed version that addresses this issue, applying a workaround such as periodically restarting the application or attempting to clear its cache might be the most practical approach until a more permanent solution is found.

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