selecting gpt 5.5 shows error "model metadata not found"
Open 💬 10 comments Opened Apr 23, 2026 by pdeva
💡 Likely answer: A maintainer (github-actions[bot], contributor)
responded on this thread — see the highlighted reply below.
What version of Codex CLI is running?
0.123.0
What subscription do you have?
chatgpt plus
Which model were you using?
5.5
What platform is your computer?
Darwin 25.4.0 arm64 arm
What terminal emulator and version are you using (if applicable)?
ghostty
What issue are you seeing?
seeing this error when using the cli
<img width="1326" height="373" alt="Image" src="https://github.com/user-attachments/assets/479ccf18-ab62-4206-b63a-fe9a078d170b" />
even though using the desktop app, on the same computer, with the same login works fine
<img width="774" height="681" alt="Image" src="https://github.com/user-attachments/assets/5d54f143-e44b-4ffb-88b1-982a139882c9" />
What steps can reproduce the bug?
select gpt 5.5 and msg the cli
What is the expected behavior?
_No response_
Additional information
_No response_
10 Comments
Potential duplicates detected. Please review them and close your issue if it is a duplicate.
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Same issue here.
Try upgrading to latest codex cli version 0.124.0
https://developers.openai.com/codex/cli#cli-setup
https://developers.openai.com/codex/changelog#github-release-312880358
It is already the latest version.
Same issue
Model metadata for
gpt-5.5not found. Defaulting to fallback metadata; this can degrade performance and cause issues.My thread ID 019dbed7-9d5b-70c1-9b1e-9de27d3e4d42
same issue over here
Same issue coming on 0.124.0
When using the model gpt-5.5, the system reports:
Model metadata for
gpt-5.5not found. Defaulting to fallback metadata; this can degrade performance and cause issues.This indicates that the runtime cannot locate the metadata definition for gpt-5.5 and is falling back to a generic configuration.
Yes, this is also the prompt. Will there be any issues if I keep using it?
At least the model should accurately tell what version of GPT it is.
It just says GPT-5.
So it's tough to know if I'm using GPT 5.4 or 5.5 because of a bug in your UI code.