OpenAI retiring GPT-5.5 on October 14: you may need to update your workflow

OpenAI will end support for GPT-5.5 in ChatGPT, ChatGPT Work, and Codex on October 14, 2026, across all plans. ChatGPT conversations will move to a new default model, while Codex developers must manually switch to GPT-5.6 Sol. API access to GPT-5.5 remains for now.

• Shutdown affects ChatGPT, ChatGPT Work, and Codex on all plans
• Codex developers advised to migrate to GPT-5.6 Sol
• API with key will continue to work unchanged
• GPT-5.5 launched April 23, 2026 and lasted less than six months