Claude in Microsoft 365 Copilot
Microsoft added Claude Sonnet 4 and Opus 4.1 to Microsoft 365 Copilot's Researcher agent and Copilot Studio, alongside OpenAI models.
Enterprise customers can pick Claude for deep research (Researcher agent) and agent building (Copilot Studio) alongside existing model options, which Anthropic framed as reaching millions of enterprise users. Inference only, but it suggests Microsoft was widening its model sources beyond OpenAI.
- Date
- Wednesday, 24 September 2025
- Lab
- Anthropic
- Kind
- product
- Access
- closed API
Announced by Microsoft; Anthropic's post is the second-party account. Later steps were Claude in Microsoft Foundry and an Anthropic-Microsoft-NVIDIA partnership (not opened here).
Sources
This record was checked against its sources on 6 October 2026. How we check