I'm pretty sure these large models are run on Nvidia GPUs, not some unobtainable piece of secret kit. You could go down the street and buy from AMD or a number of other vendors to push out FLOPs if you wanted or needed, but you'll need a thick wallet to shell out for a cluster of GPUs to run these models. The reason people don't run the big Chinese models at home is that they can't afford the hardware, not that it isn't publicly available. This tech is essentially a large amount of matrix multiplications afterall.

I think the larger problem is that restricting US AI companies gives the Chinese a leg up because they now have a window open where they can become the source of the most powerful models available due to government restrictions rather than on technical merits. All Anthropic customers just got a downgrade last evening, for example. While the Chinese are able to serve the world or whoever, the US corporations will be limited to the US market, or whatever the powers that be will allow. This restrictiveness could turn out to be disadvantageous to American companies since people will migrate to wherever they can get the most powerful models.