product · May 14, 2026
Microsoft Retires Claude Sonnet 4.5 in Copilot Studio with Auto-Migration to 4.6
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Microsoft announced the retirement of Claude Sonnet 4.5 in Copilot Studio on May 13, 2026. Automatic migration to Claude Sonnet 4.6 begins on May 30, 2026, following an evaluation period through May 29. Admins can enable a 30-day extension via settings before the deadline. The update ensures continued support for Anthropic models in agent development. Claude Sonnet 4.5 powered agents since March 2025, now replaced by the enhanced 4.6 version for better performance.
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