That may be because they have a lot more budget and the support of one of the largest cloud providers on earth.
Offering free GPU compute to millions of people is really not an easy or cheap task.
Maybe... but not exactly what I meant in my case. I was commenting being able to get access at all, not my ability to pay. If Anthropic didn't have such a crazy application process I'd happily pay to use the API so I could learn more about it.