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Can someone explain what this all means? Has codex just been updated to use chat-gpt 5 ? Or is this just extra info?

Even shorter version:

- New coding-specialist model called GPT-5-Codex, coming soon to the API but for now available in their Codex CLI, VS Code and Codex Cloud products

- New code review product (part of Codex Cloud) that can review PRs for you

- New model promises better code review, less pointless comments and can vary its reasoning effort for simple vs complex tasks

The pelican is not so convincing though :)

So a bit in line with what Theo mentioned in his video that he was not happy with the ui capabilities

Good point I forgot about the pelican!

Amazing thank you

It is a new version of GPT-5 that's been primarily optimized for coding. Hence this confusing name - GPT-5-Codex.

This model is available inside all OpenAI codex products. Yet to be available on Api

The model is supposed to be better at code reviews and Comments than the other GPT-5 variant. It can also think/work upto 7 hours.

Amazing cheers