I'm 99.9% sure Opus 4.7 is a smaller model than 4.6.

Too many signs between the sudden jump in TPS (biggest smoking gun for me), new tokenenizer, commentary about Project Mythos from Ant employees, etc.

It looks like their new Sonnet was good enough to be labeled Opus and their new Opus was good enough to be labeled Mythos.

They'll probably continue post-training and release a more polished version as Opus 5