No doubt Anthropic Mythos/Fable are frontier. I also miss having access as it uncovered some "evals repellant" regressions on my personal pet factory.

OTOH for most of my day to day work I've come to realize that faster ~ Opus 4.6 / GPT 5.3 level capabilities could be the sweet spot as scaffolding has to be put in place right after clean specs and constant review anyways. The latest chinese models and GLM 5.2 in particular felt on-par on that front.