Archive · 16 Sep 2026
OpenAI Retires GPT-5.5 From ChatGPT and Codex October 14
GPT-5.5 will no longer be available in ChatGPT, ChatGPT Work, or Codex after October 14.
The retirement applies to access through plan-based authentication across all plans.
OpenAI is directing Codex users toward GPT-5.6 Sol or GPT-6 Astra.
Developers using the API can continue accessing GPT-5.5.
Users should check whether they access GPT-5.5 through a subscription or an API key before the deadline.
- Who
- OpenAI, ChatGPT, ChatGPT Work, and Codex users and developers.
- What
- GPT-5.5 will be retired from ChatGPT, ChatGPT Work, and Codex when accessed through plan-based authentication.
- When
- October 14.
- Where
- Within ChatGPT, ChatGPT Work, and Codex; API access remains available.
- Why
- OpenAI is updating its model lineup and directing users toward newer systems.
- Retirement date
- October 14
- Affected products
- ChatGPT, ChatGPT Work, and Codex
- Affected access method
- Plan-based authentication across all plans
- API availability
- Developers can continue accessing GPT-5.5 through the API
- Suggested Codex alternatives
- GPT-5.6 Sol and GPT-6 Astra
- Key user action
- Check whether GPT-5.5 is accessed through a subscription or an API key