By Craig Hale
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Craig Hale
25 September 2025
Copilot users can now use Claude models, should they want to
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(Image credit: Microsoft)
Microsoft Copilot is gaining access to Anthropic’s Claude models
They’ll be hosted on AWS, and accessed via an API
Office apps could soon get Claude models, too
Microsoft has added Anthropic’s Claude Sonnet 4 and Claude Opus 4.1 to the selection available for Copilot users, marking a major shift as it pivots away from exclusively offering OpenAI models.
Anthropic’s models will be available across two areas at first – a new ‘Try Claude’ button appears in the researcher agent experience, and will also be available in Copilot Studio, where users can opt for Claude models to help with building custom AI agents.
Business & Industry Copilot President Charles Lamanna announced the change in a blog post, noting Microsoft’s “commitment to bring the best AI innovation from across the industry” to Copilot.
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You don’t have to explain everything to Claude anymore – it’s finally in your apps
Anthropic is adding Claude Code to business plans – so now all your workers can enjoy a major AI boost
Claude AI just became the ultimate work companion, and it might tempt me to switch from ChatGPT
Microsoft now offers Anthropic models for Copilot
Claude models have started rolling out to users on the Frontier program, Microsoft 365 Copilot and Copilot Studio users can opt in, but there is a key difference between the Anthropic and OpenAI offerings.
Anthropic’s models will not be hosted on Azure, but rather they will be accessed via an API and hosted on AWS infrastructure.
Though it marks a shift for consumer and enterprise models within the Microsoft ecosystem, developers have already had access to other models, and indeed GitHub Copilot in VS Code recently started favoring Claude Sonnet 4 over OpenAI models.
With Claude outperforming OpenAI models in Excel and PowerPoint tasks, it could just be a matter of time before alternatives start to become available within Microsoft’s productivity suite.
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“This is just the beginning,” Lamanna said. “And stay tuned: Anthropic models will bring even more powerful experiences to Microsoft 365 Copilot.”
All of this comes after OpenAI and Microsoft parted ways. Once exclusive partners, OpenAI has now signed up with Google Cloud and others for compute, so it was only natural that Microsoft would begin using other AI models too.
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With several years’ experience freelancing in tech and automotive circles, Craig’s specific interests lie in technology that is designed to better our lives, including AI and ML, productivity aids, and smart fitness. He is also passionate about cars and the decarbonisation of personal transportation. As an avid bargain-hunter, you can be sure that any deal Craig finds is top value!
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You don’t have to explain everything to Claude anymore – it’s finally in your apps
Anthropic is adding Claude Code to business plans – so now all your workers can enjoy a major AI boost
Claude AI just became the ultimate work companion, and it might tempt me to switch from ChatGPT
Anthropic launches Claude for Financial Services to give research analysts an AI boost
Anthropic takes the fight to ChatGPT – offers Claude AI tools to US government for just $1
What if Clippy and AI Cloud intelligence had a baby? It would probably look like Microsoft’s new Copilot Appearance feature
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