If you mean clearly, noticeably erratic or incoherent behaviour, then that hasn't been my experience for >=4-bit inference of 32B models, or in my R1 setup. I think the others might have been referring to this happening with smaller models (sub-24B), which suffer much more after being quantised below 4 or 5 bits.

My R1 most likely isn't as smart as the output coming from an int8 or FP16 API, but that's just a given. It still holds up pretty well for what I did try.