Separate model selection for Plan vs Execute modes (e.g., GPT-5-high for planning + GPT-5-Codex execute)

Resolved 💬 4 comments Opened Oct 23, 2025 by proxlavee Closed Dec 31, 2025

💡 Likely answer: A maintainer (github-actions[bot], contributor) responded on this thread — see the highlighted reply below.

What feature would you like to see?

Allow Codex to use one model for planning and a different one for execution. Example: use a gpt5-high to outline a solution, then switch to a gpt5-codex to implement.

Note : i know plan mode does not exist yet.

Additional information

_No response_

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4 Comments

github-actions[bot] contributor · 10 months ago

Potential duplicates detected. Please review them and close your issue if it is a duplicate.

#5197
#4897
#4882
#4488

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proxlavee · 10 months ago

Not duplicate.

etraut-openai contributor · 7 months ago

This feature hasn't received many upvotes or additional posts in a long time, so I'm going to close it out.

dhishan-dayspring · 4 months ago

@proxlavee The feature you requested is live now.