Grok 4 is not just plausibly SOTA, the opening slide of its livestream presentation (at 2:29 in the video) slightly ambiguously suggests that Grok 4 used as much RLVR training as it had pretraining, which is itself at the frontier level (100K H100s, plausibly about 3e26 FLOPs). This amount of RLVR scaling was never claimed before (it's not being claimed very clearly here either, but it is what the literal interpretation of the slide says; also almost certainly the implied compute parity is in terms of GPU-time, not FLOPs).

Thus it's plausibly a substantially new kind of model, not just a well-known kind of model with SOTA capabilities, and so it could be unusually impactful to study its safety properties.

Another takeaway from the livestream is the following bit of AI risk attitude Musk shared (at 14:29):

It's somewhat unnerving to have intelligence created that is far greater than our own. And it'll be bad or good for humanity. I think it'll be good, most likely it'll be good. But I've somewhat reconciled myself to the fact that even if it wasn't gonna be good, I'd at least like to be alive to see it happen.