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AI summary
Written by AI from the official notes. Check them for exact details.GPT-5.5 is retired from Codex for ChatGPT users, effective October 14, 2026.
- GPT-5.5 retires for ChatGPT users on October 14, 2026.
- Use GPT-6.1 Sol for new tasks and configurations.
- API key authenticated sessions remain unaffected.
- Update all settings that use GPT-5.5.
Why it matters: Administrators and users should transition to GPT-6.1 Sol to ensure continued functionality.
Full release notes
Effective October 14, 2026, at noon PDT (19:00 UTC), GPT-5.5 retires from Codex for users signed in with ChatGPT. The OpenAI API and Codex sessions authenticated with an API key aren't affected.
Use GPT-6.1 Sol (gpt-6.1-sol) when available to your plan and client. Update workspace defaults, saved model settings, managed configurations, custom agents, scheduled tasks, and scripts that still select gpt-5.5.
See GPT-5.5 retirement for plan-specific replacements and workspace model availability for administrator guidance.