Microsoft has upgraded its Copilot AI assistant by integrating Anthropic’s Claude Opus 4.1 and Claude Sonnet 4 models, announced on September 24, 2025. Users can now select between these Anthropic models and OpenAI’s offerings for complex tasks like reasoning, coding, and content creation. This diversification boosts Copilot’s versatility, reflecting a strategic shift to incorporate multiple AI sources and stay competitive.
Powering Diverse Workflows
Claude Opus 4.1 excels in deep reasoning, while Sonnet 4 balances speed and capability, ideal for coding and enterprise agents. Available in Microsoft 365 Copilot and Copilot Studio, this multi-model approach caters to business users, with admins controlling model access under Anthropic’s terms.
Who Gets It and When?
Rolling out to commercial Copilot users in the U.S. starting September 24, 2025, with global expansion planned. AI Pro and Ultra subscribers get priority access, enhancing productivity tools like Word and Excel.
A New Era of AI Collaboration
This partnership with Anthropic, valued at $183 billion, signals a broader industry trend of blending proprietary and rival AI models. It’s a step toward a more dynamic, user-driven AI ecosystem—one task at a time.
