Qwen3.6 was the first model I ran locally that seemed smart, but qwen3-coder:30b is way, way more responsive and more accurate for writing code according to my tests, including human-eval. If you can run one than you can almost certainly run the other. If you haven't tried qwen3-coder I would definitely recommend it. It feels positively snappy compared to every other local model I've tried. All you need is 32G VRAM and some heat dissipation.