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codex - 💡(How to fix) Fix "Unsupported value: 'low' is not supported with the 'gpt-5.2-codex-2026-01-14' model. Supported values are: 'medium'. [2 comments, 2 participants]

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openai/codex#19188•Fetched 2026-04-24 05:59:10
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wiley-sayvantwiley-sayvant
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etraut-openaietraut-openaiwiley-sayvantwiley-sayvant
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Error Message

"error": {

Code Example

› test

■ {
  "error": {
    "message": "Unsupported value: 'low' is not supported with the 'gpt-5.2-codex-2026-01-14' model. Supported values are: 'medium'.",
    "type": "invalid_request_error",
    "param": "text.verbosity",
    "code": "unsupported_value"
  }
}
RAW_BUFFERClick to expand / collapse

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

v0.124.0

What subscription do you have?

none, using azure

What platform is your computer?

Darwin 25.3.0 arm64 arm

What issue are you seeing?

After moving from v0.122.0 to v0.124.0 I'm seeing this for all queries

› test

■ {
  "error": {
    "message": "Unsupported value: 'low' is not supported with the 'gpt-5.2-codex-2026-01-14' model. Supported values are: 'medium'.",
    "type": "invalid_request_error",
    "param": "text.verbosity",
    "code": "unsupported_value"
  }
}

What steps can reproduce the bug?

Install v0.224.0, target codex 52

What is the expected behavior?

No response

Additional information

No response

extent analysis

TL;DR

The issue is likely due to an unsupported verbosity value 'low' with the 'gpt-5.2-codex-2026-01-14' model in Codex App v0.124.0.

Guidance

  • The error message indicates that the 'low' verbosity value is not supported with the specified model, and only 'medium' is allowed.
  • To mitigate this, try changing the text.verbosity parameter to 'medium' in your queries.
  • Verify that the issue is resolved by checking the response for successful query execution without the "unsupported_value" error.
  • If the issue persists, ensure that you are using the correct model and version, as specified in the error message.

Notes

The solution assumes that the 'medium' verbosity value is a suitable replacement for 'low' in the context of the queries being executed.

Recommendation

Apply workaround: change the text.verbosity parameter to 'medium', as it is the only supported value for the 'gpt-5.2-codex-2026-01-14' model.

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#API routing#API middleware#SSR setup#ISR setup#authentication setup

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