Microsoft is set to incorporate Anthropic’s Claude models into its Office 365 suite, marking a significant expansion beyond its current reliance on OpenAI’s technology for Copilot functionalities in Word, Excel, Outlook, and PowerPoint. A report from The Information suggests that this announcement is expected in the near future.
Until now, Microsoft has relied heavily on OpenAI’s models to drive its productivity features. The inclusion of Anthropic indicates a strategic shift aimed at broadening its AI collaboration. Reports indicate that Microsoft will pay Amazon for access to Anthropic’s Claude Sonnet 4 model via AWS, contrasting with its arrangement with OpenAI, where no additional costs are incurred due to a multibillion-dollar investment.
Microsoft insists that this initiative does not imply any issues with OpenAI, despite speculation around tensions related to the AI company’s proposed transition to a public benefit corporation and its pursuit of greater autonomy. A representative from Microsoft indicated to The Information that OpenAI will continue to serve as their partner in frontier models, affirming a commitment to their long-term alliance.
It is reported that Microsoft executives believe Claude Sonnet 4 outperforms OpenAI’s GPT-5 in specific tasks, particularly in producing polished outputs such as visually appealing PowerPoint presentations. Interestingly, Claude Sonnet 4 is not Anthropic’s leading model, signifying that Microsoft sees considerable potential in its overall capabilities.
This move aligns with Microsoft’s overarching strategy of diversifying its AI resources and ensuring self-sufficiency. The company already provides various models, including xAI’s Grok and Anthropic’s Claude, via GitHub Copilot and has initiated the development of its own models such as MAI-Voice-1 and MAI-1-preview.
On the other hand, OpenAI is also working on initiatives aimed at reducing its dependence on Microsoft. The company recently introduced a job platform designed to compete with LinkedIn and reportedly plans to commence mass production of proprietary AI chips in partnership with Broadcom by 2026, enabling the operation of training and inference on its own hardware.
Even with the introduction of Anthropic’s models, Microsoft has confirmed that the pricing for Copilot will remain consistent at $30 per user per month.