https://www.vice.com/en_us/article/y3wwwb/the-defense-department-now-has-gpt-4-thanks-to-microsoft

On Wednesday, Microsoft announced it will now offer U.S. government departments access to its artificial intelligence models, such as OpenAI's GPT-4.

As stated in a blog post by Microsoft, its Azure OpenAI Service will now help Azure Government customers accelerate content generation, create summaries of reports and logs, optimize search, and simplify code.