I don't see this as that different. Anthropic was the first one to get involved in the "AI models must be approved" regime. OpenAI just has the advantage of being second.

(To be clear: I do not like this new paradigm)

OpenAI was already holding models back because "dAnGeR" before anyone knew or cared about them. It's always been a PR gag and Anthropic just so happens to be better at marketing than making frontier models available to a general audience, much to their own dismay.