Automatic code reviews with OpenAI Codex

Published: 04 November 2025
on channel: OpenAI

74,346

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Maja Trębacz and Romain Huet show you how to set up Codex to automatically review new pull requests in GitHub and in the Codex CLI, and discuss the research approach we used to train our models to generate quality code reviews.

Timestamps:

00:00 Intro
01:23 Automatic code review in GitHub
02:34 Codex code review vs static analysis
03:31 Training models for high-signal code reviews
04:18 How OpenAI uses Codex code review
05:57 Customizing code review with AGENTS.md
06:58 Code reviews in the Codex CLI

Try it yourself:
Code review: http://chatgpt.com/codex/code-review

Learn more:
Codex: openai.com/codex
Developer docs: https://developers.openai.com/codex/c...

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