codex - 💡(How to fix) Fix Allow changing reasoning/thinking effort on the fly in the CLI with a slash command [4 comments, 3 participants]

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openai/codex#20477Fetched 2026-05-01 05:42:46
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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.

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No response

extent analysis

TL;DR

Implementing a slash command, such as /effort or /reasoning, could allow users to change the model effort or reasoning on the fly without quitting the CLI.

Guidance

  • Consider adding a new slash command to the existing CLI interface to handle effort or reasoning changes dynamically.
  • Evaluate the current /model command to see if it can be extended to include effort or reasoning toggles.
  • Review the codex-cli documentation and codebase to determine the best approach for implementing dynamic configuration changes.
  • Assess the potential impact of introducing new commands or modifying existing ones on the overall user experience and CLI functionality.

Notes

The feasibility of this feature request depends on the internal architecture and design of the codex-cli tool, which is not fully detailed in the issue.

Recommendation

Apply workaround: Implement a new slash command or modify the existing /model command to allow for dynamic effort or reasoning changes, as this seems to be a targeted solution to the reported ergonomic issue.

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codex - 💡(How to fix) Fix Allow changing reasoning/thinking effort on the fly in the CLI with a slash command [4 comments, 3 participants]