Anthropic's Claude Opus 4.5 Arrives in Microsoft Copilot Studio
Anthropic releases Claude Opus 4.5 with enhanced reasoning and long-context handling, now available directly in Microsoft Copilot Studio. The model replaces Claude Opus 4.1 as an experimental option for developers.
Anthropic releases Claude Opus 4.5, and it is available immediately in Microsoft Copilot Studio. This new model delivers sharper reasoning, stronger long-context handling, and better performance in multi-step tasks. Additionally, Claude Opus 4.5 is coming to public preview in Microsoft Foundry.
This release highlights Microsoft's commitment to providing diverse model choices for developers building agents. Over the past 60 days, Copilot Studio adds major models like GPT-5, GPT-5.1, Claude Sonnet 4.5, and Claude Opus 4.5 on their exact release dates. Combined with new platform capabilities like agent evaluations, this makes it easier for users to test multiple models and find the perfect fit for their business needs.
Claude Opus 4.5 replaces Claude Opus 4.1 as an experimental model in Copilot Studio. Because of its experimental status, Microsoft encourages users to test it only in non-production scenarios. Administrators must opt in to use Anthropic models via the Microsoft 365 Admin Center, though existing Anthropic users require no additional action.