Allow changing reasoning/thinking effort on the fly in the CLI with a slash command
Resolved 💬 4 comments Opened Apr 30, 2026 by enlivn Closed Apr 30, 2026
💡 Likely answer: A maintainer (github-actions[bot], contributor)
responded on this thread — see the highlighted reply below.
What variant of Codex are you using?
CLI codex-cli 0.128.0
What feature would you like to see?
To switch the model effort/reasoning, I need to quit the CLI and then resume it by passing a config flag with -c. It would be far more ergonomic to allow changing the reasoning on the fly with a slash command such as slash effort or /reasoning or /thinking.
Alternatively, you could also allow users to toggle or tweak the effort when they select the model with /model.
Additional information
_No response_
4 Comments
Potential duplicates detected. Please review them and close your issue if it is a duplicate.
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Please upvote #19357.
Thanks, @etraut-openai. I did search before opening this issue but didn't see that one.
Also, I just realized
/modeldoes let you change reasoning effort as the second step after model selection. 🤦🏾