This model is not supported when using X-OpenAI-Internal-Codex-Responses-Lite.

[ZenGeekLabs]

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

This model is not supported when using X-OpenAI-Internal-Codex-Responses-Lite.

What subscription do you have?

plus

What platform is your computer?

mac

What issue are you seeing?

This model is not supported when using X-OpenAI-Internal-Codex-Responses-Lite.

What steps can reproduce the bug?

This model is not supported when using X-OpenAI-Internal-Codex-Responses-Lite.

What is the expected behavior?

This model is not supported when using X-OpenAI-Internal-Codex-Responses-Lite.

Additional information

This model is not supported when using X-OpenAI-Internal-Codex-Responses-Lite.

[github-actions]

Potential duplicates detected. Please review them and close your issue if it is a duplicate.

• Bug: "Model not supported when using X-OpenAI-Internal-Codex-Responses-Lite" error with latest models #30461
• This model is not supported when using X-OpenAI-Internal-Codex-Responses-Lite. #30422
• Codex App: GPT-5.5 fails with X-OpenAI-Internal-Codex-Responses-Lite while GPT-5.4 works #30406
• This model is not supported when using X-OpenAI-Internal-Codex-Responses-Lite. #30912
• Switching accounts causes it to fail to work #30388

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