Gpt-5-codex medium model incorrectly sets Reasoning Effort to none instead of medium

What version of Codex is running?

codex-cli 0.36.0

Which model were you using?

gpt-5-codex medium

What platform is your computer?

Windows

What steps can reproduce the bug?

1. Configure or select one of the built-in codex models: low, medium, high — these map to Reasoning Effort: low|medium|high as expected.

1. Try to set the newer model identifier gpt-5-codex medium.

1. Inspect the /status Reasoning Effort field.

What is the expected behavior?

When selecting gpt-5-codex with the medium variant, the CLI should set Reasoning Effort to medium (same mapping as the old medium model).
Reasoning Effort: medium

What do you see instead?

When selecting gpt-5-codex medium, the CLI reports Reasoning Effort: none (or omits it), i.e. the mapping to medium is lost and the field becomes none.
Reasoning Effort: none

<img width="836" height="205" alt="Image" src="https://github.com/user-attachments/assets/2d5a10b1-36d7-4a68-b7f3-4581bbab46b9" />

Additional information

_No response_