I ran the preview model around 2,126,605,070 tokens for $22.04 USD for the last couple of days. Kind of shocked.
It did a decent job refactoring https://github.com/mmastrac/diffgemma to create a CUDA support backbone, it's struggling a bit to port metal kernels to CUDA unattended (it hasn't managed to get numbers to match over >1 layer).
It successfully ported a root exploit to an older Android phone that GLM5.3Flash and DSv4Flash were struggling a bit on, though I didn't start it from scratch and it picked up some of their work.
FWIW it feels like a slightly-north of Opus 4.8 model, not quite Opus 5, not fable. It thinks in circles far less than DSv4F. The API version is insanely fast - was getting ~400 tok/s at times.