GPT-5.2 and GPT-5.3-Codex have been sunset in Codex with ChatGPT subscriptions
OpenAI Developer Community
June 2, 2026
If this truly is the case, then the ChatGPT website needs updating as it still says you can access the Codex agent via a Plus / Pro / Business plan which is seriously confusing. I was about to upgrade to Pro to get more usage of Codex but I’m not sure what’s happening at this stage.
Discussion in the ATmosphere