Microsoft is moving away from exclusive reliance on OpenAI by integrating Anthropic’s Claude Sonnet 4 AI into Office 365 applications like Word, Excel, PowerPoint, and Outlook. This decision reflects growing tension between Microsoft and OpenAI, as both companies pursue independent initiatives. Microsoft’s leaders reportedly believe Anthropic’s models excel in specific capabilities, such as designing visually appealing presentations, and see value in diversifying their AI portfolio. Additionally, Microsoft is advancing its own in-house AI systems while negotiating new terms with OpenAI, whose restructuring plans remain in progress. On the other side, OpenAI is reducing dependence on Microsoft’s infrastructure by developing its own AI chips. This evolving competition marks a shakeup in the AI market.