Anthropic Claude Sonnet 4.5 end of life
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There are 11 days until Anthropic Claude Sonnet 4.5 end of life, on Tuesday, 29 September 2026.
Anthropic Claude Sonnet 4.5 reaches end of life on September 29, 2026: upstream support ends and no further security fixes are expected. It was released on September 29, 2025.
- Where
- Worldwide
Date source
Last verified Sep 18, 2026
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