OpenAI will shut down GPT-5.5 on October 14.
Source：
x.com
OpenAI announced that starting October 14, GPT-5.5 will be discontinued across all plans for ChatGPT, ChatGPT Work, and Codex. If users are using GPT-5.5 in Codex, they must switch to GPT-5.6 Sol or GPT-6 Astra.
