📌 Key Takeaways
- Anthropic models are now available in Microsoft 365 Copilot.
- Researcher adds Claude Opus 4.1, Copilot Studio adds Sonnet 4 and Opus 4.1.
- You can switch models in Researcher and pick per agent in Studio.
- Access starts via the Frontier Program for opted-in, licensed customers.
- Anthropic models are hosted outside Microsoft-managed environments under Anthropic terms.
Claude Arrives In Microsoft 365 Copilot For Researcher And Studio
Microsoft is expanding model choice inside Microsoft 365 Copilot. Teams can now use Anthropic’s Claude alongside existing options, starting in the Researcher agent and in Copilot Studio for building custom agents.
Researcher exposes Claude Opus 4.1 as a selectable reasoning model, while Copilot Studio adds Claude Sonnet 4 and Claude Opus 4.1 so builders can choose models per task, mix providers, and orchestrate multi-agent flows.
“We’re expanding the models that power Microsoft 365 Copilot with the addition of Anthropic models.”
— Charles Lamanna, President, Business & Industry Copilot
Today we’re expanding Microsoft 365 Copilot with the addition of Anthropic’s Claude models. Customers can now use both OpenAI and Claude — starting in Researcher and Copilot Studio, and coming to more experiences soon.
Our multi-model approach goes beyond choice. It’s all about… pic.twitter.com/IwHQfczs86
— Satya Nadella (@satyanadella) September 24, 2025
How It Works In Researcher
The Researcher agent now lets users switch between providers for deep, multi-step work. After opt-in, a clear control appears to try Claude for long-form analysis across web sources and work content. You can move back to the previous model at any time.
“Once you opt in, you’ll be able to switch between OpenAI and Anthropic models in Researcher with ease.”
— Microsoft
What Builders Get In Copilot Studio
In Copilot Studio, Sonnet 4 and Opus 4.1 appear in the model picker. You can assign models to specific tools or sub-tasks, and combine providers in a multi-agent pattern without leaving Studio. This keeps agent design, testing, and routing in one place.
“Build, orchestrate, and manage agents powered by Anthropic models for deep reasoning, workflow automation, and flexible agentic tasks.”
Rollout, Hosting, And Admin Steps
Anthropic models are rolling out now through the Frontier Program to customers with Microsoft 365 Copilot licenses who opt in. Admins can enable access in the Microsoft 365 admin center.
Anthropic models are hosted outside Microsoft-managed environments and are subject to Anthropic’s terms.
Third-party coverage shows the same details in product screenshots, including a visible “Try Claude” control in Researcher and model options inside Studio.
Why This Matters
Model flexibility lets teams pick the best tool for a given job, then adjust as requirements change.
That may mean using one provider for long-context reasoning inside Researcher, another for Studio tasks that need faster orchestration, all within the Microsoft 365 environment.
Quick Start
- Confirm you hold Microsoft 365 Copilot licenses, then opt in to the Frontier Program.
- In Researcher, select Claude Opus 4.1, run a real analysis task, and compare outputs.
- In Copilot Studio, assign Sonnet 4 or Opus 4.1 to a specific agent step and test routing.
Conclusion
Anthropic models are now part of the Microsoft 365 Copilot toolkit. Researcher adds a switchable option for deep work, Copilot Studio adds new picks for agent design, and admins can enable access today through the Frontier Program.
Start with a side-by-side trial on a real task, then lock in routing rules based on quality, latency, and cost.
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