DeepSeek Instead of OpenAI in Copilot Cowork: Microsoft Considers Shift to Cut Costs

Microsoft is changing the economic model of Copilot Cowork on two fronts: moving to a consumption-based pricing model and considering a self-hosted and optimized version of DeepSeek V4 as a more cost-effective alternative for heavier agent workloads.

Charles Lamanna, Microsoft’s executive vice-president for Copilot, agents, and platform, stated to Axios: "We have users running hundreds of tasks a week, which is great, they are highly productive, but the consequence is that costs can escalate significantly." Currently, Copilot Cowork operates on Anthropic and OpenAI models, both of which have raised prices and discontinued flat-rate plans, making the flat fee unsustainable against agent workloads that consume tokens in a non-linear way.

DeepSeek V4 on Azure: Optional and with Safeguards
Microsoft has already worked on DeepSeek V4: the open-source model, released in April and widely adopted among developers for its low operating cost, has been optimized with additional safeguards, including modifications to reduce bias. Any integration would remain optional for enterprise customers and would run entirely on Azure, with data within Microsoft’s cloud perimeter subject to the company's security, compliance, and geographical residency controls. The indicated timeframe is weeks: Microsoft will confirm the model choice at the launch of the cheaper tier.

Multi-Model and Geopolitical Pressures
The broader strategic framework, according to Axios, is that Microsoft no longer wants to rely on a single lab. The company is building an approach that mixes and matches different engines under its own roof, dissolving the often-strained dependency relationship with OpenAI. Satya Nadella articulated this position in a public essay stating that "a frontier without an ecosystem is not stable" and that allowing a few players to dominate the AI space would be detrimental to the economy and society.

However, the choice of DeepSeek comes at a politically delicate moment. Washington has considered banning DeepSeek, has pressured Anthropic to cut access to its leading models for users outside the United States, and the dispute has escalated into crisis talks with the U.S. Department of Commerce.