" We have reviewed a report that we believe is the basis of the government's directive and validated that the level of capability displayed there is widely available from other models (including OpenAI’s GPT-5.5)"
The administration just doesn't like anthropic. OpenAI is in bed with the trump Administration.
What they know right now is that the model is so advanced the US government has to ban it, and the model comes out of Anthropic. Not Google. Not OpenAI.