Grok models land in Microsoft Copilot across Word, Excel and PowerPoint as a subprocessor
xAI
Microsoft is rolling xAI's Grok models into Copilot inside Word, Excel and PowerPoint, with xAI acting as a subprocessor handling prompts under Microsoft's data-processing terms. Reports note system prompts keep Grok outputs strictly work-appropriate.
Why it matters
Microsoft's productivity suite, previously an OpenAI stronghold, now ships a second frontier lab's models to hundreds of millions of Office users — a concrete diversification of Microsoft's AI supply chain.
Importance: 3/5
Second frontier lab's models shipped to hundreds of millions of Office users