GPT-5.2 and GPT-5.3-Codex have been sunset in Codex with ChatGPT subscriptions
OpenAI Developer Community
June 13, 2026
Yup, not sure what happened to 5.3 codex, they ruined the community and project becomes nightmares because 5.5 and 5.4 only show pieces and burning the tokens. never hear something from @OpenAI_Support what they are thinking and deciding they should listen
Discussion in the ATmosphere