Codex CLI can change model thinking effort while working
Resolved 💬 2 comments Opened Jun 10, 2026 by Whyaremax Closed Jun 12, 2026
What version of Codex CLI is running?
codex-cli 0.139.0
What subscription do you have?
Pro
Which model were you using?
gpt-5.5
What platform is your computer?
Microsoft Windows NT 10.0.28120.0 x64
What terminal emulator and version are you using (if applicable)?
Powershell
Codex doctor report
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}What issue are you seeing?
You're allowed to change model thinking effort while model is finishing user's request
What steps can reproduce the bug?
Tell Codex do something
While agent is working, press alt+, or alt+. corresponded to decrease or increase effort
What is the expected behavior?
Expected to prompt change effort is disabled (or similar message)
Additional information
This could be a intended feature, but I believe its an oversight.
This issue has 2 comments on GitHub. Read the full discussion on GitHub ↗