Which is also very interesting! What is the mechanism for that? Was it some weird form of collusion, which seems unlikely given that all these labs are bitter competitors? What did they do for this very specific thing to happen?

Was it distillation, which is already happening in this adversarial setting? If so how much did they really distill from each other for this to happen, and what are the labs doing about it?

Or is everyone just routing to Claude in their backend? ;-)

No matter how I slice it I run into pretty low probability scenarios, which is why I find it very curious!