Model page
Kimi K2 Thinking
Moonshot AI's open-source thinking model via Fireworks. 1T MoE, step-by-step reasoning, tool use. SOTA on HLE, BrowseComp. 256k context. Does not support web search or image input.
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.