GPT-5.2 and GPT-5.3-Codex have been sunset in Codex with ChatGPT subscriptions
OpenAI Developer Community
June 4, 2026
please bring back chatgpt 5.3 for codex. i just switched from claude to chatgpt because of 5.3 is more capable and token efficient. if it continues like this, i might have to start trying deepseek or other chinese models
Discussion in the ATmosphere