Microsoft launches Copilot Cowork

Summary

Charles Lamanna, who runs agents, platform, and business applications at Microsoft, used the Copilot Cowork launch to argue that agentic AI is moving beyond developers and into the broader population of Office users, hundreds of millions of people who have never thought in terms of automations.

Copilot Cowork

Copilot Cowork extends Microsoft 365 Copilot from chat into background task execution, covering delegation, long-running workflows, tool use, and calendar management. Microsoft also announced Agent 365, an IT governance layer that lets administrators manage and deploy agents from Microsoft and third parties. That governance layer is a direct response to enterprise anxiety about employees spinning up agents that send emails and create documents at scale.

Multi-model routing

Lamanna is explicit that no single model wins every task. For standard chat inside Microsoft 365 Copilot, the auto-router defaults to OpenAI models, which Microsoft believes best fit its work-context grounding. For Cowork's long-running agentic tasks such as code generation, terminal use, and extended background runs, Microsoft routes to Anthropic's Claude family. More models from Microsoft's own MAI lab are coming. Users get one Copilot surface, and Microsoft decides which model handles which job.

Go-to-market

Lamanna argues sales and finance teams are easier to convert than engineers because they are already metric-driven. Engineers have historically resisted clean measurement of impact, but a sales rep knows their quota, attainment, and revenue per head on day one. Microsoft says M365 Copilot delivered a nearly 10% increase in revenue per seller in published experiments, and that agents handling accounts reconciliation automated roughly 30% of all back-office finance work in one documented case study. Those are the numbers Lamanna expects to open CFO budgets.

Token budgets

Seats still dominate Microsoft's M365 revenue model, but Lamanna says the shift toward consumption pricing is underway. Microsoft already runs large consumption businesses through Azure, so the commercial infrastructure exists. The near-term operational question for enterprise IT is governance, specifically how many tokens each user or department can spend. Lamanna expects that to evolve into something resembling an expense-approval hierarchy, with token budgets becoming a standard line item in department planning.

Calendar demo

Lamanna's most concrete personal example involved asking Cowork to scan his calendar three months out. It declined 17 meetings on his behalf after analyzing his reporting relationships, whether he was optional or required, and the meeting topics. He reviewed all 17, agreed with every recommendation, and described watching the meetings disappear from Outlook as the product's clearest magic moment so far.

Adoption curve

Lamanna draws a direct parallel to GitHub Copilot, where developers who gained agentic coding tools found them impossible to give up. He expects the same dynamic to play out for information workers within nine months. Rather than asking Office users to adopt a new environment, Microsoft is bringing Cowork to where they already work, inside Excel, PowerPoint, Outlook, and Windows.