Today we announced that Microsoft and Anthropic are expanding our partnership. As part of the partnership, Claude Sonnet 4.5, Haiku 4.5, and Opus 4.1 models are now available in public preview in Microsoft Foundry, where Azure customers can build production applications and enterprise agents.This enables companies to build with Claude, the world's best models for coding, agents, and office tasks, all while using their existing Microsoft ecosystem. Developers can also use Claude models in Microso...