"Unsupported value: 'low' is not supported with the 'gpt-5.2-codex-2026-01-14' model. Supported values are: 'medium'.

Resolved 💬 3 comments Opened Apr 23, 2026 by wiley-sayvant Closed Apr 23, 2026

💡 Likely answer: A maintainer (etraut-openai, contributor) responded on this thread — see the highlighted reply below.

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_

View original on GitHub ↗

3 Comments

etraut-openai contributor · 4 months ago

Yes, this model doesn't support "low". Recommend switching to "medium" or using a different model.

wiley-sayvant · 4 months ago

I had previously been using 5.2 medium by default, nothing changed in my config.

After killing and restarting, I saw a prompt to try 5.4, which I declined, and it started working again.

kentyman23 · 4 months ago

I think this should be reopened. There was a regression that make an unset verbosity for gpt-5.2-codex default to low, which isn't supported. We shouldn't have explicitly set it to the default in our config.toml. Please fix!