Anthropic announces that Sonnet 4-5 is deprecated and will be fully decommissioned on November 30, 2026
Source: https://platform.claude.com/docs/en/about-claude/model-deprecations Columns on the screenshot above are API Model Name, Current state, Deprecated, Tentative retirement date
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- 2026-09-30 18:46 · r/ClaudeAI
Anthropic announces that Sonnet 4-5 is deprecated and will be fully decommissioned on November 30, 2026