According to @AnthropicAI, Claude Sonnet 4 and Opus 4.1 are now available in Microsoft 365 Copilot, bringing Claude’s advanced reasoning capabilities to millions of enterprise users; source: twitter.com/AnthropicAI/status/1970907112831328296 and anthropic.com/news/claude-now-available-in-microsoft-365-copilot. For trading purposes, this is confirmed product availability within Microsoft 365 Copilot, providing verifiable enterprise deployment news rather than forward-looking commentary; source: twitter.com/AnthropicAI/status/1970907112831328296 and anthropic.com/news/claude-now-available-in-microsoft-365-copilot.