Model page
Claude Sonnet 4.6
Anthropic's most capable Sonnet yet. Full upgrade across coding, long-context reasoning, agent planning, and design. 1M token context window in beta. Same pricing as Sonnet 4.5.
Key dates
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ChatGPT
GPT‑4o retirement (ChatGPT)
OpenAI is retiring GPT‑4o inside ChatGPT on February 13, 2026. This does not automatically imply API removal.