OpenAI Sunsets GPT-5.2 and GPT-5.3-Codex in Codex for ChatGPT Subscribers

OpenAI has removed GPT-5.2 and GPT-5.3-Codex from availability in Codex for users accessing it through ChatGPT subscriptions. The change took effect around June 2, 2026, with users reporting the models disappeared from the VS Code extension and CLI without clear prior notice in some cases. Details of the Change Users on the OpenAI Community forum...