GenAI.mil is the War Department’s enterprise generative-AI platform launched in December 2025 to provide secure, department-wide AI tools for military, civilian and contractor personnel; its stated role is to accelerate mission execution, decision superiority and operational tempo by giving the ~3 million Department users approved generative-AI capabilities for unclassified and approved work.
OpenAI and the War Department said the plan is to deploy a custom version of ChatGPT (the announcement does not specify a public model name like “o3” or “o4”); OpenAI’s blog says it will deploy a tailored/custom ChatGPT on GenAI.mil approved for the Department’s unclassified work.
The public announcements say ChatGPT will be made available for the Department’s approved work but do not detail use with classified data; prior DOD practice and reporting indicate GenAI.mil is intended for unclassified or appropriately approved information only—the press materials do not say that ChatGPT will process classified data and raise that as an open/ unanswered security question.
Public statements do not disclose whether services will run on DoD-controlled infrastructure or OpenAI cloud or the precise data-flow architecture; OpenAI says it will deploy a custom ChatGPT on GenAI.mil (implying integration into the GenAI.mil environment) but the exact hosting and ingress/egress controls were not published in the announcement.
The public release mentions the partnership and broader safety/enterprise goals but does not list specific safeguards, testing protocols or oversight mechanisms for ChatGPT on GenAI.mil; reporting notes the DOD has funded ‘frontier AI’ contracts and emphasizes training and security as priorities, but details on model validation, red-teaming, logging, human oversight, or approval authorities were not included in the announcement.
Officials say integrating ChatGPT into GenAI.mil aims to make frontier models a standard daily tool across the Department and accelerate operational tempo; that implies more personnel will have conversational AI assistance for tasks like drafting, analysis, coding and decision support, coupled with department training—but the announcement does not provide detailed workflow changes or examples for specific job-types.