What does this question mean? Of course they are state-of-the-art. After all, they are the most recent and most advanced models out of Anthropic. If/when they release a new version of their models, Mythos/Fable will cease to be state-of-the-art, as the new ones become it.

It means Mythos/Fable was the strongest model globally, not just the newest model from a company.