Microsoft tests usage-based Copilot Cowork pricing and outlines openness to cheaper open-source AI models

Microsoft has begun moving Copilot Cowork to a usage-based pricing structure, a shift that aligns with how many enterprises are trying to manage AI costs as usage grows. The change was reported by Yahoo Finance on Wednesday, describing it as a new approach to billing for the product, which is aimed at workplace knowledge work.

In the same report, Microsoft also indicated it could broaden the model options behind Copilot. Rather than treating proprietary frontier systems from vendors such as OpenAI and Anthropic as the default, Microsoft “floated” DeepSeek and other open-source models as potential lower-cost alternatives that could be swapped into Copilot workflows.

DeepSeek is an open-source AI model family that has drawn attention for delivering high-performance natural language capabilities at costs that are often discussed as meaningfully lower than those of some closed, premium models. In enterprises, the appeal is less about brand and more about total cost of ownership, especially when workloads are measured in high volumes of prompts, document processing, and iterative drafting.

Copilot Cowork sits inside Microsoft’s broader Copilot ecosystem, which includes AI features that draft text, summarize information, and assist with research and analysis inside Microsoft work tools. While Microsoft has not disclosed in the Yahoo Finance report how it will balance model quality, latency, and cost under the new pricing approach, a usage-based structure typically means customers pay more directly for how intensively they use AI assistance.

The pricing change comes as AI vendors face sustained pressure to show that copilots can be deployed at scale without runaway operating expenses. Enterprises often want predictable budgets and clearer levers for controlling AI spend, such as setting usage caps or tying billing to demand, rather than paying for fixed capacity that may not be fully utilized.

The report’s suggestion that open-source models could replace or supplement certain closed frontier models adds another layer to Microsoft’s strategy. If customers perceive that open-source options can deliver adequate output for some tasks, Microsoft could route lower-stakes workloads to cheaper models while reserving higher-end models for the most difficult prompts.

Still, key details are not provided in the Yahoo Finance post. It does not specify the exact billing units Microsoft uses for Copilot Cowork, the price points customers will see, or which model families could be eligible for routing in production. It also does not clarify whether Microsoft would offer the same configuration across all regions and tenants, or how it would handle differences in safety filters, compliance tooling, and enterprise governance for open-source systems.

For customers and markets, the main question now is whether Microsoft’s cost controls will be matched by product transparency and performance consistency. Watch for Microsoft to explain the practical mechanics of the usage-based pricing and to clarify how Copilot decides which models to use, because that will determine whether cost savings translate into reliable outcomes for enterprise users.