Pentagon AI: ChatGPT & Grok Join, Ending Google Exclusivity

The U.S. Department of Defense has added OpenAI's "ChatGPT Mil" and "Grok for Government" to its generative AI platform, GenAI.mil. This ends the platform's exclusive reliance on Google Gemini, which had been in place since December 2025. What's interesting is that this creates a multi-model system, allowing military and civilian personnel to choose between different AI models. This move is driven by the Chief Digital and Artificial Intelligence Office to avoid dependence on a single AI vendor. The platform now has over 1.7 million registered users, and this rapid growth highlighted the need for more diverse AI capabilities. Both new models are certified under Impact Level 5, a security standard for handling sensitive unclassified information. They operate in a secure government cloud, separate from public versions. The bottom line is that the military is diversifying its AI tools to enhance operational flexibility and security.