Elon Musk has welcomed Microsoft’s decision to bring his artificial intelligence company’s Grok models into Microsoft Copilot, expanding the reach of Grok across one of the world’s largest workplace software ecosystems.
Musk wrote on X on September 12, “Grok available in Microsoft Copilot,” responding to Microsoft CEO Satya Nadella’s announcement that the company was adding Grok to Copilot.
Nadella said the move would provide “More model choice” in Copilot and welcomed Grok to the platform. The integration initially focuses on Microsoft Copilot experiences in Word, Excel and PowerPoint, with the rollout beginning with customers participating in Microsoft’s Frontier program, according to reports tracking Microsoft’s announcement.
Musk also highlighted the potential productivity benefits of the integration. In a follow-up post, he said his Excel spreadsheets and PowerPoint presentations would be “10 times better” with Grok, describing the improvements as AI-powered.
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The move marks another step in Microsoft’s strategy of making Copilot a multi-model platform rather than relying exclusively on a single AI model provider. Microsoft has already expanded Copilot with models from companies including OpenAI and Anthropic, while Grok gives users access to technology developed by Musk’s AI business.
Grok’s arrival also builds on an expanding relationship between Microsoft and Musk’s AI operations. Microsoft previously made Grok models available through Azure AI Foundry and Copilot Studio, giving developers and businesses access to xAI models within Microsoft’s cloud ecosystem.
For Microsoft, the broader model strategy could give Copilot users more flexibility in selecting AI systems for different tasks. For Musk’s AI business, integration into Word, Excel and PowerPoint places Grok directly inside applications used daily by businesses, students and professionals.
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The development comes as competition among leading AI companies intensifies. Microsoft remains closely linked to OpenAI while expanding its access to other models, while Musk’s AI business continues to push Grok beyond its origins on X and into enterprise software.
The latest integration could therefore give Grok a much wider workplace audience while strengthening Microsoft’s position as a platform where users can access multiple competing AI models.