Qwen 3.5 397B is the best local coder I have used until now
r/LocalLLaMA
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Generative AI
Open Source AI
Omg, this thing is amazing. I have tried all its smaller silbings 122b/35b/27b, gpt-oss 120b, StepFun 3.5, MiniMax M2.5, Qwen Coder 80B and also the new Super Nemotron 120b. None even come close to the knowledge and the bugfreeness of the big Qwen 3.5. Ok, it is the slowest of them all but what I am losing in token generation speed I am gaining, by not needing multiple turns to fix its issues, and by not waiting in endless thinking. And yes, in contrast to its smaller silblings or to StepFun 3.5, its thinking is actually very concise.