Model page
Grok-4.1 Fast Non-Reasoning
Fast non-reasoning variant of Grok-4.1 optimized for quick responses.
Key dates
We use concrete dates and keep them consistent across the site.
ChatGPT
GPT‑4o retirement (ChatGPT)
OpenAI is retiring GPT‑4o inside ChatGPT on February 13, 2026. This does not automatically imply API removal.