They aren't "Just as accurate". What you see with these quants is the providers only ever show performance on already saturated benchmarks. You'll see labs put out 1-bit quants Deepseek v4.1 claiming only 1% degradation because they're only showing the benchmarks which tell that story. Then you look at the performance on those same benchmarks for significantly weaker models like Qwen3.8-27B even and it's virtually the same because that benchmark is saturated.

I like these quants as much as the next guy when they're all I can run but I have both R9700 with 32GB VRAM and a 5060 Ti with only 16GB VRAM and so I run both Q6 Unlsoth quants and ISTA IQ3_XXS quants and yeah there is an absolute world of difference in realworld performance.

IMHO I think it's pretty scummy behavior from the quant providers to frame these quants this way. Just be honest about where the degradation is really occurring on the non-saturated benchmarks.

I don't know, it hallucinates quite badly - confuses js with python.

Multiple teams and efforts are now making Qwen 3.8 27b work much faster on Mac and CUDA and the inference speed is doubling almost every week. There's now ongoing competition about who will make it work faster with exactly the same byte output at https://mlx.fast . TensorFold is the project to follow.