Claude AI Models from Anthropic Integrated into Microsoft 365 Copilot

October 21, 2025

Details

  • Anthropic’s Claude Sonnet 4 and Claude Opus 4.1 models are now integrated into Microsoft 365 Copilot, following Microsoft’s announcement in September 2025 and a subsequent statement from Anthropic in October. The rollout is happening through Microsoft’s Frontier Program to licensed customers who opt in.
  • The integration allows Microsoft 365 Copilot users, particularly enterprises, to access Claude models within the Researcher agent and Copilot Studio. Researcher leverages Opus 4.1 for complex research tasks, while both Sonnet 4 and Opus 4.1 are available in Copilot Studio for building customized enterprise AI agents and automations.
  • Enterprise administrators must enable Claude model access via the Microsoft 365 admin center, after which users can select Claude alongside other AI models through a dropdown. Microsoft’s approach positions Claude alongside the existing OpenAI GPT-5 model within its flagship productivity suite.
  • Anthropic models are hosted outside Microsoft-managed clouds and operate under Anthropic’s separate terms. Integration is powered by Anthropic’s open Model Context Protocol (MCP), enabling secure connections to third-party enterprise data. The expansion also includes a Microsoft 365 connector for Claude Team and Enterprise customers.
  • The addition supports Microsoft's broader strategy of expanding beyond exclusive reliance on OpenAI by integrating more AI model choices for customers. Claude Sonnet 4.5 support was introduced shortly after the initial rollout, giving organizations increased flexibility in their enterprise AI deployments.

Impact

This move represents Microsoft’s push toward a federated, multi-model AI ecosystem, empowering enterprises to mix and match AI models to suit specialized tasks. It heightens competition with Google Workspace and other cloud rivals by reducing vendor lock-in and boosting operational resilience. As organizations seek adaptable AI tools, Microsoft’s integration strategy signals a trend toward greater model diversity across productivity platforms.

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