Microsoft will add Anthropic’s AI models to its Copilot assistant for business users, expanding beyond OpenAI technology.

The update, launching September 24, 2025, follows a deal to bring Anthropic’s AI to Microsoft Office apps like Word, Excel, and Outlook.

Copilot users can now choose between OpenAI’s models and Anthropic’s Claude Opus 4.1 and Claude Sonnet 4 for research and custom AI tools.

Opus 4.1 is designed for complex reasoning and planning, while Sonnet 4 handles routine development and large-scale data tasks.

The move shows Microsoft’s AI partnerships are becoming less exclusive, signaling a broader shift in its strategy.

🔗 Source: TechCrunch