GPT-6 Sol and Claude Opus 5.5 roll out across six Microsoft Copilot surfaces

Josh Cook | Microsoft MVP @FlowAltDeleteOriginally posted 2026.09.23

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One announcement. SIX Copilot surfaces. Claude Opus 5.5 and GPT-6 Sol are rolling out across Word, Excel, PowerPoint, Chat, Cowork and Copilot Studio. The question for admins: WHO can use each model, where, and under which policy? In Cowork, the Anthropic model control is tenant-wide. Auto chooses from models your organization allows. Map the access before you tell everyone to switch models. https://techcommunity.microsoft.com/blog/microsoft-copilot-blog/more-models-one-copilot/4559035