Microsoft and Anthropic have expanded their partnership to make Claude models, including Sonnet 4.5, Haiku 4.5, and Opus 4.1, available in Microsoft Foundry, enabling Azure customers to develop production applications and enterprise agents using these advanced models. The integration allows developers to utilize Claude's capabilities within the existing Microsoft ecosystem, including Microsoft 365 Copilot, where Claude enhances research and custom agent development, as well as in Excel for tasks like formula generation and data analysis. By providing serverless deployment through Microsoft Foundry, developers can start building immediately without additional vendor contracts, using their existing Azure agreements. Claude models support a variety of applications, from sophisticated reasoning and autonomous coding to customer support automation and specialized reasoning tasks, with support for multiple programming languages and capabilities such as code execution and web search. These integrations aim to streamline AI adoption for enterprises already invested in Microsoft technologies, offering scalable, efficient, and cost-effective AI solutions.