GPT-5.2 and GPT-5.3-Codex have been sunset in Codex with ChatGPT subscriptions

5.4 and 5.5 are probably the worst models I’ve ever seen. If OpenAI don’t realize this in time, they will lose thousands of subscriptions to Claude - mine included. They simply removed your day-to-day model, with no other reliable option: 5.4-mini is just frustating; 5.4 is already too expensive and also dumb, and 5.5 is just extra expensive.