GPT-5.2 and GPT-5.3-Codex have been sunset in Codex with ChatGPT subscriptions
OpenAI Developer Community
June 3, 2026
Could this be related to partnerships they started with eg. github (copilot) that recently announced gpt-5.3-codex will be a LTS model and their main default? perhaps partnerships with others where the model is still available?
Discussion in the ATmosphere