Desktop app model picker does not show gpt-5.5 even when backend reports it available
Summary
The Codex desktop app model picker does not show gpt-5.5, even though the app backend reports that model as available and the current config is already set to gpt-5.5.
This looks like a desktop UI / model-filtering issue rather than a backend availability problem.
Reproduction
- Start the Codex desktop app.
- Open the model picker before starting a new chat.
- Observe that
gpt-5.5is missing from the selectable models.
Expected behavior
If the backend reports gpt-5.5 in the available model list, the desktop app should display it in the picker and allow selecting it.
Actual behavior
The desktop app picker does not show gpt-5.5, so a new chat falls back to another model (for example gpt-5.4) even when gpt-5.5 is otherwise recognized by the app runtime.
Evidence
- The app backend
model/listresponse includesgpt-5.5. - The app backend
config/readresponse shows the configured model isgpt-5.5. - The desktop picker still does not display
gpt-5.5.
Additional notes
This may be related to the same class of desktop model-filtering / feature-flag issues discussed in:
- CLI-3934
- [#10873](<https://github.com/openai/codex/issues/10873>)
From local inspection, the frontend appears to apply an additional filtering step before rendering the picker, so this may be a UI-side gating/regression rather than a provider/config problem.
3 Comments
Potential duplicates detected. Please review them and close your issue if it is a duplicate.
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I am seeing what looks like the same issue on Windows Codex App, but with a newer app version.
Environment:
What happened:
GPT-5.5 was previously available for me in the Windows Codex App and I had been using it since release. Today I had to uninstall/reinstall the Windows app after switching the app from Windows-native mode to WSL mode, which left the app in a broken state. Reinstalling did not fully reset the broken state, and I had to use Codex CLI to inspect/repair the app configuration/state manually.
After getting the app working again, GPT-5.5 disappeared from the Windows App model picker.
Before I changed config.toml back to gpt-5.4, the config was still pointing to:
model = "gpt-5.5"
When the app tried to use it, it returned:
{"type":"error","status":400,"error":{"type":"invalid_request_error","message":"The 'gpt-5.5' model requires a newer version of Codex. Please upgrade to the latest app or CLI and try again."}}
But the app appears to already be on the latest Store version:
winget upgrade Codex -s msstore
returns:
No available upgrade found.
No newer package versions are available from the configured sources.
Troubleshooting already tried:
This does not seem to be an account entitlement issue, because GPT-5.5 works in CLI. It looks like the Windows Desktop App is either applying an app-specific model filter/version gate incorrectly, or it has persistent app state after reinstall/WSL-mode switching that causes GPT-5.5 to be hidden/refused.
I've resolved the issue by completely wiping Codex App from my PC. And I do mean completely, not just uninstall. All the shared stuff with CodexCLI must also be deleted. I've also deleted CodexCLI for good measure.
Hope it helps you. Cheers!