xAI's Grok AI models have quietly become a fixture inside the Microsoft ecosystem — and the latest announcement makes them even easier to reach. As of September 12, 2026, Grok confirmed that its models are now available to try directly within Microsoft Copilot, extending a partnership that has been building across Microsoft's product suite for most of this year.
What exactly is available in Microsoft Copilot?
Grok models are now selectable inside Microsoft Copilot, giving users the ability to run queries through xAI's AI rather than defaulting to Microsoft's own models. The integration follows earlier groundwork: according to Microsoft's documentation, Grok 4.1 Fast became available in Copilot Studio for US-based builders in preview starting February 19, 2026 — a fast-reasoning, text-generation model built for large context windows and deep tool use.
Is this the same as GitHub Copilot?
No — these are distinct products. GitHub Copilot received Grok 4.5 in August 2026, followed quickly by Grok 4.6, which rolled out on August 14, two days after its general release. Grok 4.6 is accessible across eight development surfaces including VS Code, JetBrains IDEs, Xcode, Eclipse, and the Copilot CLI. The September 12 announcement specifically concerns Microsoft Copilot — the general-purpose AI assistant — rather than the developer-focused GitHub product.
Which Copilot plans support Grok?
Based on what has been documented for the GitHub Copilot integration, Grok 4.6 supports Copilot Pro, Pro+, Max, Business, and Enterprise plans. The broader Copilot Studio availability requires an organization administrator to explicitly opt in — it is not enabled by default. Microsoft has not yet published a full tier breakdown for the general Copilot integration announced today.
What about privacy — does Microsoft or xAI see my data?
This is worth paying close attention to. According to Microsoft's documentation for Copilot Studio, customer data is not retained or used to train xAI's models when accessed through that environment. However, xAI's models are hosted outside Microsoft-managed infrastructure and are governed by xAI's own Enterprise Terms of Service and Data Protection Addendum — not Microsoft's standard data handling terms. For the Office add-ins (Word, Excel, PowerPoint, Outlook), documents are sent to xAI's servers; the Grok Business tier, launched in late 2025, keeps company data private and out of training pipelines.
How far does the Microsoft-Grok integration actually go?
Further than most people realize. Beyond Copilot and GitHub Copilot, xAI has shipped dedicated add-ins for four core Office applications: Grok for PowerPoint (June 16), Word (June 18), Excel (July 20), and Outlook (July 21) — all available through the Microsoft Marketplace. The PowerPoint, Word, and Excel add-ins are free for Microsoft 365 users; Outlook is available to paid X and SuperGrok subscribers. Connectors for Outlook Mail and Calendar, Microsoft Teams, SharePoint, and OneDrive were in place by May 2026, enabling automated office workflows through Grok Bot.
What does this mean for people who use Copilot daily?
It means Grok is no longer just an X platform feature — it is becoming a genuine workplace AI option for anyone already inside the Microsoft 365 orbit. The ability to switch models inside Copilot gives users a practical way to compare outputs, route specific tasks to the model best suited for them, and reduce dependency on any single provider. For developers, Grok 4.6's API pricing — $2 per million input tokens and $6 per million output tokens, according to published rates — positions it as a cost-competitive option relative to other frontier models available through the same interface.
The Copilot integration is live now. If you have access to Microsoft Copilot, Grok's models should be selectable from within the interface — no separate account required beyond whatever plan you already hold.
Sources & reporting notes
The links below identify the material source records used for this report.
- @grok on X (2026-09-12T15:56:36.000Z) — Direct source
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