This latest (6-June-2026) NVFP4 quant of Qwen3.6-27B keeps quality very high, while improving KLD, tail KLD metrics, top-token stability, and probability error compared to the earlier releases. It is faster and smaller in size. It applies my RSF scale fitting technique to the Q_K quants and uses a different tensor mix layout compared to previously. 6-June-2026: changed the MTP tensors to be NVFP4, ~130tk/s tg is now possible in some configurations on 5090.

I am experimenting with a smaller verison of this model designed to be used on machines with 16GB of VRAM:
Qwen3.6-27B-NVFP4-SMALL-MTP-GGUF.
The SMALL version will be slower than this model but should maintain similar quality, although I am still evaluating it.

Feedback to improve this is appreciated.

Results below on RTX 5090 with Wikitest:

Model	Size GiB	pp512	tg128	pg32768,256
RSF NVFP4	15.27	5174.31 ± 1.30	76.61 ± 0.18	2751.93 ± 23.73

Quality Metric	Earlier NVFP4	Improved RSF NVFP4	Change
Mean PPL(Q)	7.128133 ± 0.047613	7.030348 ± 0.046636	1.37% lower
Mean PPL(base)	6.900856 ± 0.045374	6.900856 ± 0.045374	(Same Base)
PPL gap vs base	0.227277 ± 0.008252	0.129492 ± 0.006913	43.0% smaller gap
Mean PPL(Q) / PPL(base)	1.032935 ± 0.001175	1.018765 ± 0.000996	43.0% lower overhead
Mean ln(PPL(Q) / PPL(base))	0.032404 ± 0.001137	0.018591 ± 0.000978	42.6% lower
Correlation ln(PPL)	98.54%	98.91%	+0.37 pp

KLD Metric	Earlier v2	Latest RSF NVFP4	Change
Mean KLD	0.058781 ± 0.000935	0.044590 ± 0.000832	24.1% lower
99.9% KLD	4.869176	3.726478	23.5% lower
99.0% KLD	0.591435	0.422199	28.6% lower
95.0% KLD	0.165489	0.122647	25.9% lower
90.0% KLD	0.096133	0.070556	26.6% lower
Median KLD	0.019355	0.013642	29.5% lower
Maximum KLD	20.671190	24.703529	higher

Token Probability Metric	Earlier NVFP4	Improved RSF NVFP4	Change
RMS Δp	6.613 ± 0.060%	5.774 ± 0.060%	12.7% lower
Same-top probability	90.450 ± 0.076%	91.924 ± 0.071%	+1.474 pp
Top-flip weight	0.009715	0.007193	26.0% lower
Top-prob RMSE	0.080946	0.069932	13.6% lower
Entropy RMSE	0.248197	0.212250	14.5% lower

michaelw9999/Qwen3.6-27B-NVFP4-MTP-GGUF

Qwen3.6-27B RSF NVFP4 GGUF v4

michaelw9999/
Qwen3.6-27B-NVFP4-MTP-GGUF