Grok Models in Copilot for Word, Excel, and PowerPoint (Preview)

Microsoft is previewing SpaceXAI's Grok models inside Microsoft 365 Copilot for a limited group of Frontier program customers.

Rolling out first in Word, Excel, and PowerPoint for eligible Frontier customers
Off by default, so an admin has to turn on a dedicated setting before anyone can use Grok models
SpaceXAI has been added to Microsoft's list of subprocessors, which matters for companies that review where their data is processed
Not available in the EU, EFTA countries, or the UK
Microsoft calls it a focused release and says wider rollout depends on customer feedback and usage

Comparing Grok's output against the other models already available in Copilot for documents, spreadsheets, and decks.

Your organization is in Microsoft's Frontier program and wants to test another model family inside the Office apps.

IT admins and AI leads deciding which models their company allows in Copilot.

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