Anthropic's Claude Sonnet 4.5, Haiku 4.5, and Opus 4.1 are now available in public preview in Microsoft Foundry for Azure customers (Anthropic)

https://www.anthropic.com/news/claude-in-microsoft-foundry
http://www.techmeme.com/251118/p55#a251118p55

Claude now available in Microsoft Foundry and Microsoft 365 Copilot

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.