Microsoft Entra

Claude Sonnet 4.5, Haiku 4.5, and Opus 4.1 Now Available in Microsoft Foundry and Microsoft 365 Copilot

Anthropic and Microsoft are expanding their partnership to make Claude Sonnet 4.5, Haiku 4.5, and Opus 4.1 available in public preview on Microsoft Foundry, enabling Azure customers to build production applications and enterprise agents using existing Azure agreements and billing. Claude is also being integrated into Microsoft 365 Copilot's Agent Mode in Excel, allowing users to generate formulas, analyze data, and iterate on spreadsheet solutions. The Foundry integration supports serverless deployment with Python, TypeScript, and C# SDKs, and includes capabilities such as code execution, web search, citations, vision, and prompt caching. This partnership reduces procurement friction for enterprises already invested in the Microsoft ecosystem.