At the end of the day it's not really a decision at all, the government has a lot of men with guns, Anthropic has (presumably) low numbers to zero of men with guns.
You don't really have a choice if the government decides to play hardball
There are other things that can happen. For example, Anthropic could secretly transfer a copy of the model to a Chinese company in exchange for a large sum of yuan at a Chinese bank. Both parts of the transaction would be invisible to US authorities. I don't think this is a likely occurrence but if you think it's impossible then you need to think outside the box more.
