Microsoft is set to revamp its Office 365 suite by incorporating AI models from Anthropic. This shift aims to enhance various features in Office 365 Copilot.
As part of this initiative, Microsoft has been using Anthropic’s Claude model for several Copilot functions, according to sources familiar with the project. This move comes after internal testing showed that Anthropic’s model outperformed OpenAI when it came to creating PowerPoint presentations and managing complex Excel tasks.
This integration means that Microsoft will combine Anthropic’s technology with OpenAI’s across its key business software, which currently serves over 430 million paying users globally.
While OpenAI’s prominent GPT-5 is still employed for many Copilot tasks, Anthropic’s Claude Sonnet 4 is taking over more advanced responsibilities like automation in spreadsheets and designing presentations.
The partnership between Microsoft and OpenAI has been under strain as they engage in complex negotiations over OpenAI’s restructuring and its potential public listing. Microsoft, being a major investor, is particularly concerned about its ownership stake and the level of access it will maintain to future AI models from OpenAI.
This ongoing negotiation, along with regulatory checks in California, has postponed OpenAI’s IPO until at least 2026, and this uncertainty complicates financial plans for its investors and employees.
Investors, including SoftBank, are seeking clarity on the situation, yet OpenAI’s nonprofit founders assert their intention to keep control to ensure they focus on developing AI for societal benefit.
When approached for comment, OpenAI declined to respond, as did Anthropic and Amazon Web Services, which provides the infrastructure for the Claude model.
A Microsoft spokesperson mentioned that OpenAI remains a key partner in the region’s AI framework and is committed to ongoing collaboration.
Unlike their partnership with OpenAI, where Microsoft utilizes some functionalities for no cost due to its significant investment, Microsoft is paying AWS for access to Anthropic’s technology.
Amazon is a major supporter of Anthropic, emphasizing the significance of this deal, especially since Microsoft also relies on competing cloud and productivity services.
The subscription price for Office 365 Copilot remains at $30 per user monthly. Analysts project that these additional features currently generate over $1 billion annually, assuming about 1% of Office 365 users are subscribed.
Some enterprises have hesitated to adopt these services, expressing concerns over AI-generated errors in presentations and spreadsheets. However, Microsoft insiders report that Anthropic’s superior performance has persuaded management to proceed with this integration.
Recently, CEO Satya Nadella elevated Charles Lamanna to oversee business applications, including Copilot. Lamanna has been actively integrating the Anthropic models into operations in recent weeks.
The changes extend beyond the Office suite. Earlier this year, Microsoft revealed that GitHub Copilot would also use advanced features from Anthropic, moving away from being solely reliant on OpenAI.
Reports suggest that Microsoft is also exploring alternatives to the consumer-focused Copilot app, particularly as it competes with ChatGPT, which has a larger user base.
The competition between OpenAI and Anthropic is heating up, as both companies are developing productivity tools that pose direct challenges to Microsoft’s offerings.
While OpenAI’s model can generate Excel sheets and PowerPoint presentations, Anthropic has recently announced a similar capability.
Interestingly, despite this rivalry, Microsoft is leveraging technology from both companies to enhance its flagship products. This dual approach underlines the ongoing significance of OpenAI and the growing impact of Anthropic in the enterprise sector.
This article is awaiting responses from Microsoft, Anthropic, and OpenAI.
