OpenAIfeature
July 30, 2026·Source

Codex Auto Review on GPT-5.6 Luna

Codex now runs its automatic code review on GPT-5.6 Luna instead of GPT-5.4, in both the ChatGPT app and the Codex CLI.

  • Auto review moves from GPT-5.4 to GPT-5.6 Luna in the ChatGPT app and the Codex CLI
  • OpenAI expects the swap plus Luna's lower price to make auto review roughly 10 times cheaper to run
  • OpenAI applied the change on its side, there is no setting to flip

Best for

Teams that let Codex review every pull request and were watching what it cost them.

When to use it

Nothing to switch on. It applies the next time auto review runs.

Who benefits

Anyone using Codex auto review in the ChatGPT app or the Codex CLI.

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Codex Auto Review on GPT-5.6 Luna | OpenAI | Chasing Next