https://san.com/cc/no-the-nsa-wasnt-hacked-by-ai-heres-what-...

If this article is accurate, it sounds like Mythos via Anthropic had proven itself to be a security risk. This explains the dual speak around it being both essential and a supply chain risk, since if it were hacked by another country it would compromise security.

Not being any riskier than any other "blackbox" AI is still sufficiently dangerous and I suppose the difference, without knowing more about what the government tested, was that they knew Mythos could do these things as they had evaluated it themselves.