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(Updated) Microsoft 365 Copilot: Declarative agents model upgrade to GPT-5.1 [MC1194070]
Message ID: MC1194070 (Updated) Updated January 15, 2026: We have updated the timeline. Thank you for your patience. [Introduction] Microsoft 365 Copilot declarative agents are upgrading to the GPT-5.1 model, which uses an “auto” architecture. The orchestrator will automatically select the…






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