The US military will reportedly use Elon Musk’s Grok AI in its classified systems

The US Department of Defense has reportedly reached a deal to use Elon Musk’s Grok in its classified systems, according to Axios. That follows news that the Pentagon is currently in a dispute with another AI company, Anthropic, over limits on its technology for things like mass surveillance.

Last year, the White ordered Grok, along with ChatGPT, Gemini and Anthropic’s Claude to be approved for government use. Up until now, though, only Anthropic’s model has been allowed for the military’s most sensitive tasks in intelligence, weapons development and battlefield operations. Claude was reportedly used in the Venezuelan raid in which the US military exfiltrated the country’s president, Nicolás Maduro, and his wife.

However, the Pentagon demanded that Anthropic make Claude available for “all lawful purposes” including mass surveillance and the development of fully autonomous weapons. Anthropic reportedly refused to offer its tech for those things, even with a “safety stack” built into that model.

xAI, by contrast, agreed to a standard that would allow the DoD to employ its AI for any purpose it deems “lawful.” However, the xAI model is not considered by officials to be as cutting-edge or reliable as Anthropic’s Claude, and they admit that replacing Claude with Grok would be a challenge. The Pentagon is reportedly also negotiating deals with OpenAI and Gemini, both of which it considers to be on par with Anthropic.

xAI had announced a version of Grok for US government agencies in July 2025. Shortly before that, though, the chatbot started spouting fascist propaganda and antisemitic rhetoric while dubbing itself “MechaHitler.” All of that followed a public spat between Musk and Trump over the president’s spending bill, after which GSA approval of Grok seemed to stall. Earlier this week, Anthropic accused three Chinese AI labs of abusing Claude’s AI with “distillation attacks” to improve their own models.

The US military will reportedly use Elon Musk’s Grok AI in its classified systems