gah could model naming be any more confusing? "Claude Fable 5: a Mythos-class model" "we're also launching Claude Mythos 5" what is the 5? how is mythos both

gah could model naming be any more confusing? "Claude Fable 5: a Mythos-class model" "we're also launching Claude Mythos 5" what is the 5? how is mythos both a model category and a model name?