Microsoft announced Copilot Cowork on March 9, 2026 — a new AI agent embedded in Microsoft 365 Copilot and built in close collaboration with Anthropic. The feature is designed to handle long-running, multi-step tasks autonomously, moving across Outlook, Teams, Excel, and PowerPoint from a single user request.

What It Does

Cowork takes a delegated task — like preparing for a client meeting — and converts it into a plan that runs in the background. It can schedule prep time on the calendar, pull relevant emails and files, generate a briefing document, run supporting data analysis, and produce a client-ready deck, checking in at key steps before applying any changes.

Microsoft says the agent is grounded in "Work IQ," the company's organizational context layer that connects user communications, meeting history, and file activity across M365 apps.

The Anthropic Angle

Microsoft worked directly with Anthropic to bring the technology behind Claude Cowork — Anthropic's own desktop agent launched on Mac in January and Windows in February — into the M365 platform. Anthropic's Claude Sonnet models are now also available in mainline Copilot Chat for all Frontier program users.

Context

Anthropic's Claude Cowork launch in January triggered a reported $285 billion selloff in enterprise software stocks and contributed to a 14%+ decline in Microsoft's own share price as investors repriced productivity SaaS incumbents. Microsoft's Copilot Cowork is, in part, the company's answer to that threat.

Pricing and Availability

Copilot Cowork is currently in Research Preview with select customers. Broader access rolls out through Microsoft's Frontier program in late March. Two new enterprise tiers go generally available on May 1:

  • Agent 365 — $15 per user per month
  • M365 E7 "Frontier Suite" — $99 per user per month