Overview
- The Information reports Microsoft will announce the change in the coming weeks, adding Anthropic models to Copilot features.
- Anthropic’s Claude Sonnet 4 will be used alongside OpenAI models across Word, Excel, Outlook and PowerPoint.
- Developers found Claude performed better on certain tasks, including financial functions in Excel and creating more visually polished PowerPoint slides, compared with GPT-5.
- Microsoft will pay Amazon Web Services to access Anthropic’s models, while Copilot pricing remains $30 per user per month.
- Microsoft says OpenAI remains its partner on frontier models as it also builds in-house systems and integrates other third-party models such as DeepSeek on Azure.