Microsoft adds Grok to Copilot across Word, Excel and PowerPoint, its first reach into a rival's productivity suite

2026-09-12 · part of Grok

What happened

Microsoft began rolling out xAI's Grok models as a selectable option inside Microsoft 365 Copilot in Word, Excel and PowerPoint, via the Microsoft Frontier Program, alongside its existing OpenAI and Anthropic options. The setting is admin-controlled and off by default; Microsoft frames it as extending the multi-model strategy it started last year by adding Anthropic's Claude to Copilot Studio. This is the first time a Grok model has shipped inside a major third-party enterprise productivity surface rather than through xAI's own products (Grok Bot, Cursor/SpaceXAI) or X itself — a distribution channel this thread has not tracked for Grok before, distinct from Grok Bot's own enterprise push (09-03, below). (Microsoft, Neowin)

Sources 2

Microsoft techcommunity.microsoft.com unrated
Neowin neowin.net unrated

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The wider story

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