Claude models are now available in Microsoft Foundry and Microsoft 365 Copilot, thanks to a new partnership between Microsoft and Anthropic. The public preview includes Claude Sonnet 4.5, Haiku 4.5, and Opus 4.1. This integration allows Azure customers to develop applications and enterprise agents using Claude’s advanced capabilities, streamlining deployment without the hassle of separate vendor contracts and billing systems. Developers can leverage Claude through serverless deployment in Microsoft Foundry, using existing Azure agreements. They can access the models via APIs and SDKs in Python, TypeScript, and C#. Sonnet 4.5 is touted as the leading coding model, ideal for complex tasks and multi-step workflows. Haiku 4.5 offers fast performance at a lower cost, suitable for high-volume applications like customer support. Opus 4.1 excels in specialized reasoning tasks requiring meticulous attention to detail. This rollout includes features like code execution, web search, and prompt caching, enhancing the functionality of applications built with Claude. For businesses already using Microsoft products, this partnership simplifies the integration of AI capabilities, reducing procurement timelines. The models are part of a broader trend of increasing investment in enterprise AI, highlighted by Anthropic’s recent $30 billion funding round, which positions the company as a leader in the market.