Microsoft Copilot adds GPT-6 Sol and Claude Opus 5.5 across its apps

Mike Tholfsen @mtholfsenOriginally posted 2026.09.23

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Today we're adding Claude Opus 5.5 and GPT-6 Sol to Microsoft Copilot across Word, Excel, PowerPoint, Chat, Copilot Cowork, and Copilot Studio. With model choice in Copilot, our customers can benefit from the unique strengths of different models, combined with Work IQ, to ground responses in the context of their work. Learn more ⬇️ https://techcommunity.microsoft.com/blog/microsoft-copilot-blog/more-models-one-copilot/4559035