Now they have Muse Spark 1.3, which is somewhere between Sonnet and Flable (Opus tier in my experience) in intelligence, but is very fast at 200+ tok/s.
I have been using Muse Spark 1.3 contrib (the one that shares your data for training but is much cheaper) via OpenCode Go $10/mo plan for coding and the thing flies, it's a pleasure to use. I think the only faster acessible model currently is Gemini 3.8 Flash which is around 250-280 tok/s.