On August 31 (local time), the US Department of Defense announced the introduction of "ChatGPT Mil," a customized version of OpenAI's ChatGPT.
PartnershipsUnited States Department of DefenseGenAI.milChatGPT MilGeminiGrok
US Department of Defense Deploys Military Version of ChatGPT, Expanding to Three Models Including Gemini and Grok
This article is a translation. Read the Japanese original
The Department will deploy the model on "GenAI.mil," an AI platform used by 3 million people, including military personnel. The Department stated that each function has been optimized to meet the needs of combatants.
In addition to chat capabilities, ChatGPT Mil allows for chat management on a project-by-project basis and customization functions for specific tasks. It is intended to support administrative work, such as handling documents containing non-classified information.
On the same day, the Department announced that a customized version of SpaceX's AI service, "Grok," would also be made available on GenAI.mil.
With this latest addition, AI from three different companies will be available on GenAI.mil, joining the customized version of Google's "Gemini," which has been integrated since the platform's launch in December 2025.
Source: “軍事向けChatGPT”導入、米国防総省 「Gemini」「Grok」の計3モデルが利用可能に (ITmedia AI+, 2026-09-01)