Where did you hear this? All the results I can find say the opposite that the US would buy anything.
[1] https://media.defense.gov/2026/Jan/12/2003855671/-1/-1/0/art...
[2] https://www.govinfo.gov/content/pkg/DCPD-202500170/pdf/DCPD-...
I get it. These models can be powerful. But will they be useful is a different question.
i would argue that no one knows answer to that yet.