Pentagon Adds ChatGPT and Elon Musk’s Grok to Military AI Platform
The Department of War is expanding GenAI.mil with secure versions of OpenAI’s ChatGPT and xAI’s Grok, creating a multi-model AI ecosystem for more than 3 million personnel
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The U.S. Department of War is bringing two of the biggest names in generative AI into its secure military environment, launching OpenAI’s ChatGPT Mil and Elon Musk’s Grok for Government on GenAI.mil.
Grok is developed by xAI, Musk’s artificial intelligence company, and is being provided to the Department through Starshield AI. The Pentagon first announced its partnership with xAI in late 2025, with plans to integrate Grok into GenAI.mil.
Both systems are accredited for Controlled Unclassified Information (CUI) at Impact Level 5 (IL5), allowing them to support secure enterprise use across the Department.
ChatGPT Mil brings chat, file analysis, projects and custom GPTs into the Department’s secure environment. It is designed primarily for document-heavy work including planning, policy, logistics and administration, with the Department saying the system will accelerate routine tasks and free personnel for higher-priority projects.
Grok for Government offers a different set of capabilities, including deep-thinking inference, adaptive reasoning modes, customizable workspaces, persistent projects and reusable “playbooks” designed to capture and scale institutional knowledge. Potential applications range from market research for acquisition teams to supply chain management.
The deployments expand GenAI.mil, which the Department describes as its premier generative AI platform. Launched nine months ago, it has already attracted more than 1.7 million unique users out of the Department’s more than 3 million personnel.
The simultaneous addition of ChatGPT and Grok also reflects an effort to avoid dependence on a single AI provider. The Department said bringing Grok onto GenAI.mil will help “eliminate vendor lock” while promoting a broader American AI ecosystem.
The move gives the Pentagon access to competing frontier AI models within the same secure environment — a significant step as the U.S. military shifts from experimenting with generative AI to deploying it across everyday operations.
Together, the deployments establish what the Department calls a multi-model ecosystem for the Joint Force, as the Pentagon pushes AI toward widespread enterprise adoption and greater decision-making capability.