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Microsoft Copilot Blog
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Expanding model choice in Copilot with Grok

Xia_Song's avatar
Xia_Song
Icon for Microsoft rankMicrosoft
Sep 12, 2026

Today we are expanding model choice in Copilot with the addition of Grok models from SpaceXAI1. This continues our commitment to bring the latest AI innovation in the industry to Copilot, tuned for work and tailored to business needs. 

Adding SpaceXAI as a subprocessor 

To support access to SpaceXAI models in Copilot, SpaceXAI has been added to Microsoft's Online Services Subprocessor List. Access to SpaceXAI models is managed through a dedicated administrative setting that is disabled by default.

Organizations that want to use these models enable the setting first, and administrators keep transparency and control over the data processed by SpaceXAI models in supported Copilot experiences.

Access to Grok models is rolling out through the Microsoft Frontier Program in Microsoft Word, Excel, and PowerPoint. We are starting with a focused release to gather customer feedback and learn how customers use the model across common productivity scenarios.

Grok is not available to Frontier customers in the European Union (EU), European Free Trade Association (EFTA), and the United Kingdom during the preview.

Expanding based on customer feedback and usage 

Our multi-model strategy gives customers access to leading AI models while maintaining the trusted Copilot experience, and what we learn in the public preview shapes what comes next. We will evaluate customer feedback, usage patterns, and product fit before broadening model availability across additional Copilot experiences and surfaces.

Before models are made available to customers, Microsoft evaluates them through testing, safety validation, and Responsible AI reviews. 

1 Grok is the model family from SpaceXAI available as a preview to eligible Frontier customers in the coming week with admin opt-in. 

Updated Sep 14, 2026
Version 2.0

5 Comments

  • Will Wilson's avatar
    Will Wilson
    Iron Contributor
    Sep 17, 2026

    How is this enabled exactly?  We are on Frontier and under the subprocessor section in Copilot settings I do not see anything for Grok or SpaceX.  Just curious where exactly this is enabled?

  • LegalCheck_OlafKoglin's avatar
    LegalCheck_OlafKoglin
    Copper Contributor
    Sep 14, 2026

    Thanks, xiasong. To avoid any confusion - and please correct me if I am wrong: 

    https://learn.microsoft.com/en-us/microsoft-365/copilot/connect-to-ai-models states that SpaceXAI (Grok) is not covered by Microsoft's Data Protection Addendum (DPA = https://use365.ms/DPA ). 

    "When your organization chooses to use a SpaceXAI model, your organization is choosing to share your data with SpaceXAI to power Copilot Studio features. This data is processed outside all Microsoft managed environments and audit controls, therefore Microsoft's customer agreements, including the Product Terms and Data Processing Addendum don't apply."

    This is wrong. As SpaceXAI, LLC has been listed in the Online Services Subprocessor List as an "Artificial Intelligence Subprocessor", it is covered by the DPA. SpaceXAI is a subprocessor (or sub-subprocessor for some MS customers) under the DPA customers hold with Microsoft.

    The DPA includes - for most online services - a Data Processing Agreement as defined in Art. 28 GDPR.

    • KurtShintaku's avatar
      KurtShintaku
      Icon for Microsoft rankMicrosoft
      Sep 14, 2026

      I think the article you're referring to is "old" and not relevant to this announcement.  (https://learn.microsoft.com/en-us/microsoft-365/copilot/connect-to-ai-models) In case you weren't aware, SpaceXAI Grok has been available to enable within Copilot Studio for over 6 months but WITHOUT a subprocessor agreement, just like Mistral.  It was basically deployable "at your own risk".

      That was then.  With this announcement - assuming it follows the same pattern as Anthropic's subprocessing agreement - SpaceXAI Grok will be available (initially to Frontier customers as it rolls out) under a subprocessor agreement specifically for Word, Excel & PowerPoint use, providing coverage by Microsoft's Product Terms and the Microsoft Data Processing Addendum.  In other words, data privacy, no-training-of-AI-models, stateless/no data storage by the subprocessor, etc. etc. etc. (I don't think this announcement impacts Copilot Studio - at least not immediately)

      I think because this announcement is "Frontier only", the product group has not published a learn.microsoft.com article like they have for Anthropic or OpenAI entitled "SpaceXAI as a subprocessor in Microsoft Online Services" and all you're seeing is the old "Connect to SpaceXAI models" article from months ago.