Microsoft built Copilot Cowork on Anthropic's Claude model and agentic framework. The $13B OpenAI partner just shipped its flagship AI feature on someone else's engine.

Microsoft has filed an amicus brief in support of Anthropic's lawsuit against the Department of Defense. The suit calls for the court to issue a temporary restraining order against the Pentagon's designation of the company as a supply chain risk,

Microsoft’s filing seeks to protect its own business exposure while backing Anthropic’s fight against the Pentagon’s supply-chain risk designation, analysts say.

(Corrects to say Claude Cowork, not Cloud Cowork, in paragraph 5) By Aditya Soni March 9 (Reuters) - Microsoft is adding Anthropic's AI technology to its Copilot service to tap growing demand for autonomous agents,

Microsoft claimed that designating Anthropic as a 'supply chain risk' would impact AI systems using tech that it supplies to the US military.

Copilot Cowork operates in the cloud, inside Microsoft 365's infrastructure, and draws on something Claude Cowork simply cannot access: the full graph of a user's enterprise work data.

Microsoft is launching Copilot Cowork, a new AI assistant built with Anthropic that can run tasks in the background and work across Microsoft 365 apps, as part of a broader wave of updates including a new $99-per-user E7 licensing tier.

Microsoft launched Copilot Cowork on Monday, an enterprise AI agent built on Anthropic's technology and named after the Anthropic product that wiped hundreds of billions off Microsoft's market cap. Why it matters: Anthropic invented the product that threatened Microsoft's stock,