`--config model_reasoning_effort="high"` fails

What version of Codex is running?

codex-cli 0.57.0

What subscription do you have?

Business

Which model were you using?

gpt-5-codex high

What platform is your computer?

Darwin 25.0.0 arm64 arm

What issue are you seeing?

Trying to use high reason resulted in prompt to log out. Tried again and same message. Log out and log in resolved it and now able to use gpt-5-codex high

What steps can reproduce the bug?

❯ codex codex --config model_reasoning_effort="high"
╭────────────────────────────────────────────────╮
│ >_ OpenAI Codex (v0.57.0)                      │
│                                                │
│ model:     gpt-5-codex high   /model to change │
│ directory: ~/Developer/conc                    │
╰────────────────────────────────────────────────╯

  To get started, describe a task or try one of these commands:

  /init - create an AGENTS.md file with instructions for Codex
  /status - show current session configuration
  /approvals - choose what Codex can do without approval
  /model - choose what model and reasoning effort to use
  /review - review any changes and find issues


› codex


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What is the expected behavior?

_No response_

Additional information

_No response_