Mohammed Husain, OpenAI’s Strategic Delivery Lead for Cyber, said at the Defense One Tech Summit in Virginia that the company expects to launch ChatGPT on GenAI.mil, the US Department of Defense’s enterprise-wide generative AI platform, in early July. The deployment would extend ChatGPT access to more than 3 million defence, civilian, and military personnel.
According to Husain, the version of ChatGPT deployed on GenAI.mil will be certified to handle Controlled Unclassified Information (CUI) and operate at Impact Level 5 (IL5), a Defense Department cloud security classification for systems processing sensitive unclassified information. Husain said OpenAI continues to coordinate with the Pentagon’s Chief Digital and Artificial Intelligence Office (CDAO) on the rollout.
The Department of Defense launched GenAI.mil in December 2025, initially centred on Gemini for Government, before announcing plans to integrate models from OpenAI and xAI. Outside GenAI.mil, federal agencies have had access to ChatGPT since at least January 2025 through ChatGPT Gov.
In August 2025, OpenAI and the General Services Administration reached a OneGov agreement that reduced the price of ChatGPT access for federal agencies. Most recently, OpenAI’s GPT-5.4 model became available to federal government users on Amazon Bedrock and AWS GovCloud earlier this month.
Husain said that as the Department of Defense adopts more capable models, token consumption, the units used by AI systems to process and generate information, is likely to increase, particularly for higher-value tasks.
He pointed to Amazon’s early June announcement that OpenAI’s GPT-5.5, GPT-5.4, and Codex models are now available on Amazon Bedrock as an example of broader access to more capable, token-intensive models.
Husain said token efficiency, measured by the cost of completing tasks rather than raw processing speed, is expected to become an increasingly important consideration in government AI deployments as model capabilities advance.
Why does this matter?
The planned rollout highlights how frontier AI models are moving from experimental deployments into core government and defence infrastructure. Rather than relying on a single provider, the Pentagon is building an ecosystem that includes models from OpenAI, Google and xAI, reflecting a broader strategy of integrating commercial AI capabilities into operational environments.
The development also illustrates the growing institutionalisation of relationships between leading AI companies and national security organisations. As advanced AI systems become embedded in government workflows, questions around security, procurement, oversight, interoperability, and strategic dependence on private-sector AI providers are likely to become increasingly important.
The deployment of ChatGPT on GenAI.mil, therefore, represents not only a technology upgrade but also a step in the evolving governance of AI within national security institutions.
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