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Pentagon rolls out ChatGPT Mil and Grok for Government, skips Claude

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Pentagon rolls out ChatGPT Mil and Grok for Government, skips Claude

The Pentagon has launched ChatGPT Mil and Grok for Government, customized versions of OpenAI's ChatGPT and xAI's Grok, giving 3 million civilian and military Department of Defense personnel access to generative AI tools built for what the department calls "warfighter needs." Both tools join GenAI.mil, a centralized, secure portal the department launched last year that offered Google Gemini when it first went live. GenAI.mil is meant to let Department of Defense employees use commercial frontier AI models without routing sensitive government data through ordinary consumer channels; the department says the official military version is exempt from the data collection that is hard to avoid in consumer tech products. The portal has already onboarded more than 1.7 million unique users out of the department's 3 million personnel, according to the Department of Defense.

ChatGPT Mil grew out of OpenAI's OpenAI for Government program and will feel familiar to commercial ChatGPT users, centered on chat, files, projects, and custom GPTs. The department says it will support document-heavy, routine unclassified work such as administrative tasks, logistics, planning, and policy, with more features to come over time. Grok for Government is pitched in more explicitly militaristic terms. It runs on Starshield AI, SpaceX's secure satellite network built on its existing Starlink technology, and the department says it will give the military "immediate productivity gains, stronger knowledge continuity and more secure and efficient collaboration," letting personnel "execute missions faster and with greater precision across numerous operational contexts, ranging from market research analysis for acquisition professionals to supply-chain management for logisticians."

Anthropic's Claude is notably absent from the new lineup. The rollout follows a dispute between Anthropic and the Pentagon after Anthropic refused to give the Pentagon unrestricted use of its AI tools and instead insisted on certain safety guardrails. The Trump administration responded by labeling Anthropic a supply-chain risk, a designation Anthropic is currently fighting in court. The Pentagon has also struck AI-related deals with Amazon Web Services, Microsoft, Nvidia, and Reflection AI as part of its broader push to use AI tools without sacrificing security.

Key facts

  • ChatGPT Mil and Grok for Government are now live on GenAI.mil, giving 3 million Department of Defense civilian and military personnel access to customized versions of ChatGPT and Grok.
  • GenAI.mil, launched last year and originally offering Google Gemini, has already onboarded more than 1.7 million unique users out of that 3 million.
  • ChatGPT Mil, built through OpenAI's OpenAI for Government program, focuses on chat, files, projects, and custom GPTs for unclassified administrative and logistics work.
  • Grok for Government runs on SpaceX's Starshield AI satellite network and is positioned for mission execution, acquisition research, and supply-chain management.
  • Anthropic's Claude is absent: Anthropic refused the Pentagon unrestricted use of its tools over safety guardrails, and the Trump administration labeled it a supply-chain risk, a designation Anthropic is fighting in court.

Why it matters

This is one of the largest institutional AI deployments to date by user count: 3 million Department of Defense personnel now have sanctioned access to commercial frontier models through a government-controlled portal. It also makes visible a rare case of a leading AI lab, Anthropic, being effectively cut out of a major government platform over a dispute about how its tools could be used.

Who it affects

Department of Defense civilian and military personnel who can now use ChatGPT Mil or Grok for Government for their daily work. OpenAI and xAI gain a foothold in defense computing through their government-tailored products. Anthropic is directly affected by its exclusion and by the supply-chain-risk designation it is contesting in court. Other vendors, including Amazon Web Services, Microsoft, Nvidia, and Reflection AI, are also part of the Pentagon's wider AI supplier base.

How to use it

ChatGPT Mil is aimed at unclassified, document-heavy routine work: administrative tasks, logistics, planning, and policy, through a chat, files, projects, and custom GPTs interface familiar to commercial ChatGPT users. Grok for Government is framed for operational uses spanning market research analysis for acquisition professionals to supply-chain management for logisticians, delivered over the Starshield AI satellite network. No pricing or licensing terms are disclosed for either tool.

How solid is it

The account comes from the Department of Defense's own press release and TechCrunch's reporting, with the 3 million and 1.7 million user figures both attributed to the department. No independent verification of usage or effectiveness is offered, and no named officials are quoted; all Pentagon statements are attributed to the department or its press release rather than to a person.

Risks and caveats

The 1.7 million and 3 million figures describe adoption of the GenAI.mil portal as a whole, not usage specific to ChatGPT Mil or Grok for Government, which have only just launched. The source does not specify what safety guardrails Anthropic insisted on, nor give a calendar date for either this launch or GenAI.mil's original debut. Anthropic's supply-chain-risk designation is still being litigated, so its outcome, and Claude's potential future status on GenAI.mil, remains unresolved.

“Starshield AI's Grok for Government will provide the warfighter with immediate productivity gains, stronger knowledge continuity and more secure and efficient collaboration”

— U.S. Department of Defense press release