It's pretty easy for the US to functionally ban chinese models. They only have to target US firms like inference providers or the biggest users, and pretty much the whole domestic market will fall into line. They don't actually care about the final few %.

Regardless of whether or not adversaries are using them, the US has by far the most compute available, and we've now hit the line where major providers are no longer releasing their best models. The public gets the "current" level of intelligence, while the US government gets to control access to the actual frontier of non-public AI. From their perspective, their enemies using GLM5.3 while they have GPT6 and Mythos6 or whatever is a fine trade.

I don't support a ban at all, nor the US's behavior, I'm just pointing out some facts that change the argument.