codex - 💡(How to fix) Fix Model switching broken f/ new thread creation [1 comments, 2 participants]

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openai/codex#19374Fetched 2026-04-25 06:10:28
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Error Message

5.5 model cannot be chosen as the active model from the model switcher dropdown, during new thread creation. If something is happening, it is not visible on the front end, and no error or other message appears to notify me of any change or the lack thereof.

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

Version 26.422.21637 (2056)

What subscription do you have?

PRO $100/mo

What platform is your computer?

macOS 15.6.1 (24G90)

What issue are you seeing?

5.5 model cannot be chosen as the active model from the model switcher dropdown, during new thread creation. If something is happening, it is not visible on the front end, and no error or other message appears to notify me of any change or the lack thereof.

What steps can reproduce the bug?

Uploaded thread: c27964bb-f5a8-4866-bbad-8b82589116e9

What is the expected behavior?

Model selector input updates to 5.5

Additional information

Level of annoying = 9/10

extent analysis

TL;DR

The issue may be resolved by checking the model switcher dropdown configuration or the thread creation process for any limitations or restrictions on selecting the 5.5 model.

Guidance

  • Verify that the 5.5 model is properly configured and enabled in the Codex App settings.
  • Check the thread creation process for any specific requirements or constraints that might prevent the 5.5 model from being selected.
  • Review the uploaded thread (c27964bb-f5a8-4866-bbad-8b82589116e9) for any potential issues or inconsistencies that could be causing the problem.
  • Ensure that the PRO subscription ($100/mo) includes access to the 5.5 model and that there are no subscription-related restrictions.

Notes

The issue may be specific to the Version 26.422.21637 (2056) of the Codex App or the macOS 15.6.1 (24G90) platform, and further investigation may be needed to determine the root cause.

Recommendation

Apply workaround: Try selecting a different model and then switching back to the 5.5 model to see if it resolves the issue, as this may help identify if the problem is specific to the model selection process.

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codex - 💡(How to fix) Fix Model switching broken f/ new thread creation [1 comments, 2 participants]