Microsoft replaces OpenAI, Anthropic models with its own AI in Excel, Outlook

**🤖💼 Microsoft is accelerating its artificial intelligence strategy by increasingly replacing third-party AI models with its own in-house technology across products such as Excel, Outlook, GitHub Copilot, and Microsoft Teams, signaling a major shift in the company's long-term AI roadmap.**

According to recent reports, Microsoft's internally developed **MAI** models are now handling tens of thousands of AI requests every week inside popular productivity applications that were previously powered primarily by OpenAI and Anthropic technologies. The transition reflects Microsoft's broader effort to reduce dependence on external AI providers while lowering the cost of delivering AI-powered services to millions of users worldwide.

The move comes as AI usage across Microsoft's ecosystem continues to grow rapidly through products such as **Copilot**, where billions of AI tokens are processed each month. Company executives have indicated that developing competitive in-house models will allow Microsoft to improve efficiency, control infrastructure costs, and optimize performance across its expanding portfolio of enterprise software.

Earlier this year, Microsoft introduced several new foundation models during its annual Build developer conference, highlighting advances in coding, reasoning, and language capabilities. Company leadership has suggested that some of these models can now compete with leading commercial AI systems while operating at significantly lower costs.

Microsoft also plans to expand the use of its proprietary AI models into additional products, including automated transcription, workplace collaboration tools, and software development platforms. The strategy reflects the company's ambition to build a vertically integrated AI ecosystem where both the software and underlying intelligence are developed internally.

The shift comes as Microsoft's relationship with OpenAI continues to evolve. While the two companies remain strategic partners, both are increasingly investing in their own independent technologies and business initiatives. OpenAI is reportedly developing its own AI hardware and enterprise platforms, while Microsoft continues expanding its proprietary AI research and cloud capabilities.

Industry analysts say the transition highlights a broader trend across the technology sector, where major companies are seeking greater control over their AI infrastructure, reducing reliance on external model providers while competing to deliver faster, more efficient, and lower-cost artificial intelligence services. As enterprise AI adoption accelerates worldwide, ownership of core AI models is becoming a key competitive advantage for the world's largest technology companies. 🚀🌍