Claude Opus 5.5 Comes to Microsoft Foundry for Long-Running Coding and Knowledge Work
Microsoft, Tuesday, September 22nd, 2026
Claude Opus 5.5 is now available in Microsoft Foundry, bringing Anthropic's most capable model to enterprise coding and knowledge-work agents.
Microsoft has made Claude Opus 5.5 available in Microsoft Foundry for developers and enterprises building AI applications and agents.
The model advances Opus 5 across agentic coding, knowledge work, and long-running tasks, while making its actions and decisions easier for people to review and trust.
It can trace bugs across a codebase, refactor and review code, and carry tasks through investigation, implementation and validation over long agentic sessions. Microsoft also notes Claude Opus 5.5 uses fewer tokens for the same work, with lower per-token prices and cheaper cache reads.