ChatGPT Goes to 3 Million US Soldiers — Joining GenAI.mil [2026]

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ChatGPT Rolls Out to 3 Million US Military Personnel — 3 Key Takeaways

  • OpenAI’s ChatGPT has been added to the US Department of Defense’s GenAI.mil platform.
  • Accessible to 3 million military personnel, with 1.1 million currently active users.
  • Joins Google Gemini and xAI Grok as the third AI model on the platform.

ChatGPT Joins GenAI.mil

The US Department of Defense has announced a partnership with OpenAI to add ChatGPT to GenAI.mil.[OpenAI] GenAI.mil is the Department of Defense’s dedicated generative AI platform, launched in December 2024 with Google Gemini. xAI Grok was added just before Christmas, and ChatGPT is the third to join.[Breaking Defense]

Currently, 1.1 million people are using it, and it will be expanded to 3 million personnel across the military.[DefenseScoop]

Security and Data Isolation

This ChatGPT is different from the commercial version. It runs in a government cloud, and data is isolated within the government environment. It is also not used for OpenAI model training.[OpenAI] Currently, it only handles non-secret sensitive data, and classified approval is in progress. It stems from a contract worth up to $200 million signed by the CDAO in June 2025.[Breaking Defense]

Prospects for AI Military Use

The growth rate of securing 1.1 million users in just two months since its launch is impressive. Secretary of Defense Haghesse is encouraging, “Use AI, go to GenAI.mil.” As the military use of generative AI becomes more widespread, discussions about accuracy and security are also expected to increase.

Frequently Asked Questions (FAQ)

Q: Who can use GenAI.mil?

A: Approximately 3 million military personnel, civil servants, and contractors affiliated with the US Department of Defense are eligible. Currently, 1.1 million are active users, and the entire military has designated it as the official AI platform. The general public cannot access it.

Q: How is ChatGPT on GenAI.mil different from the regular version?

A: It runs in a government-dedicated cloud, and data is isolated within the government environment. It is not used for training OpenAI’s public models. Currently, only non-secret sensitive data can be processed, and classified processing is pending approval.

Q: What AI models are available on GenAI.mil?

A: There are currently three. It started with Google Gemini, and xAI Grok was added. ChatGPT joined as the third in February 2026. All three models are government-customized, unlike commercial versions.

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