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Anthropic retires claude-sonnet-4-5 on 30 November 2026: what to change

On 30 November 2026, Anthropic removes claude-sonnet-4-5 from the API, together with its dated version. From that day, API calls to it fail. Anthropic's recommended replacement (as of 13 November 2026): claude-sonnet-5-5. What retires, and what replaces it Anthropic lists this model on its deprecat…

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Timeline · 2 reports

  1. 2026-11-14 05:40 · DEV Community — AI
    Claude Sonnet 4.5 retires on 30 November: find it in your code
  2. 2026-11-13 22:11 · DEV Community — AI
    Anthropic retires claude-sonnet-4-5 on 30 November 2026: what to change

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