How to use from
llama.cpp
Install (macOS, Linux)
curl -LsSf https://llama.app/install.sh | sh
# Start a local OpenAI-compatible server with a web UI:
llama serve -hf michaelw9999/Qwen3.6-27B-NVFP4-MXFP6-MTP-GGUF:NVFP4
# Run inference directly in the terminal:
llama cli -hf michaelw9999/Qwen3.6-27B-NVFP4-MXFP6-MTP-GGUF:NVFP4
Install from WinGet (Windows)
winget install llama.cpp
# Start a local OpenAI-compatible server with a web UI:
llama serve -hf michaelw9999/Qwen3.6-27B-NVFP4-MXFP6-MTP-GGUF:NVFP4
# Run inference directly in the terminal:
llama cli -hf michaelw9999/Qwen3.6-27B-NVFP4-MXFP6-MTP-GGUF:NVFP4
Use pre-built binary
# Download pre-built binary from:
# https://github.com/ggerganov/llama.cpp/releases
# Start a local OpenAI-compatible server with a web UI:
./llama-server -hf michaelw9999/Qwen3.6-27B-NVFP4-MXFP6-MTP-GGUF:NVFP4
# Run inference directly in the terminal:
./llama-cli -hf michaelw9999/Qwen3.6-27B-NVFP4-MXFP6-MTP-GGUF:NVFP4
Build from source code
git clone https://github.com/ggerganov/llama.cpp.git
cd llama.cpp
cmake -B build
cmake --build build -j --target llama-server llama-cli
# Start a local OpenAI-compatible server with a web UI:
./build/bin/llama-server -hf michaelw9999/Qwen3.6-27B-NVFP4-MXFP6-MTP-GGUF:NVFP4
# Run inference directly in the terminal:
./build/bin/llama-cli -hf michaelw9999/Qwen3.6-27B-NVFP4-MXFP6-MTP-GGUF:NVFP4
Use Docker
docker model run hf.co/michaelw9999/Qwen3.6-27B-NVFP4-MXFP6-MTP-GGUF:NVFP4
Quick Links

Changed GGML TYPE to 50, latest mxfp6 build is required

Model Card for Model ID

This is my best model yet! It offers incredibly fast performance with incredible quality.
This is the MXFP6 enhanced version of michaelw9999/Qwen3.6-27B-NVFP4-MTP-GGUF.

It was quantized with my work-in-progress advanced-gguf-quantizer

Why add MXFP6 tensors into the NVFP4?
MXFP6 has vastly superior quality compared to NVFP4.
Only a relatively small portion of this model is MXFP6, though; it's used to boost the quality up, where needed.
Most of the model is NVFP4, some small numbers of tensors are Q4_K.
How much MXFP6 to inject to get close to BF16 in real world usage and benchmarks vs raw numbers remains TBD.
This model is almost as fast as the primary NVFP4 model, and just a tiny bit bigger, but the results are further improved: See this chart (thanks to@raulgdm) with the NVFP4/MXFP6 blend's improvement over the all original model:

Qwen3.6-27B Quantization Benchmarks
Benchmark Samples Q6_K (150K) NVFP4-Q8_0 (27/05) NVFP4 1f (29/05) NVFP4 1f updated (30/05) NVFP4/MXFP6 (w/ repack)
GSM8K5188.2%86.3%88.2%88.2%96.1%
ARC Easy30100%100%100%100%100%
HellaSwag3063.3%66.7%73.3%73.3%86.7%
PIQA20100%100%100%100%100%
HumanEval pass@116485.4%84.8%86.0%85.4%87.2%
Average—87.9%88.2%90.4%90.4%94.0%
PPL ratio (WikiText-2 full KLD)———1.131.1051.0269
PPL ratio = Mean PPL(Q)/PPL(base) = 1.026890 from the full KLD/PPL run.


For more context, see:

https://github.com/ggml-org/llama.cpp/discussions/22498 and https://github.com/ggml-org/llama.cpp/discussions/23853

You must install the unofficial MXFP6 CUDA build of llama.cpp for this model to work.

For best performance and quality, use NVFP4-Repack with MXFP6 from:
https://github.com/michaelw9999/llama.cpp/tree/nvfp4repack_mxfp6_cuda
Without NVFP4 repack:
https://github.com/michaelw9999/llama.cpp/tree/mxfp6-cuda

These branches are updated regularly.
NVFP4 repack preloads all tensors into a CUDA tile to boost speed. It is a tiny bit slower on first load, then provides ~10% prefill boost with a small reduction in token gen seen on larger models, and an increase on smaller models.
However, it also enables NVFP4 input scale, which boosts model correctness.


Model Performance on 5090 with MXFP6-CUDA branch
This model should be faster than the NVFP4-only version, as the MTP tensors are MXFP6.

| qwen35 27B NVFP4-MXFP6|  15.23 GiB |    27.32 B | CUDA       |  99 | pp512 |       5180.83 ± 2.14  |
| qwen35 27B NVFP4-MXFP6|  15.23 GiB |    27.32 B | CUDA       |  99 | tg128 |         76.56 ± 0.27

Model Performance on 5090 (with NVFP4 Repack)

| qwen35 27B NVFP4-MXFP6|  15.23 GiB |    27.32 B | CUDA       |  99 |  pp512 |      5675.78 ± 94.88 |
| qwen35 27B NVFP4-MXFP6|  15.23 GiB |    27.32 B | CUDA       |  99 |  tg128 |         73.71 ± 1.24 

Model Quality
Running the ppl/kld test on the standard wiki.test:
With NVFP4-Repack

====== Perplexity statistics ======
Mean PPL(Q)                   :   7.081974 ±   0.047190
Mean PPL(base)                :   6.900856 ±   0.045374
Cor(ln(PPL(Q)), ln(PPL(base))):  98.63%
Mean ln(PPL(Q)/PPL(base))     :   0.025907 ±   0.001098
Mean PPL(Q)/PPL(base)         :   1.026246 ±   0.001127
Mean PPL(Q)-PPL(base)         :   0.181118 ±   0.007867

====== KL divergence statistics ======
Mean    KLD:   0.054232 ±   0.000890
Maximum KLD:  25.507811
99.9%   KLD:   4.043683
99.0%   KLD:   0.546427
95.0%   KLD:   0.152158
90.0%   KLD:   0.088751
Median  KLD:   0.018002
10.0%   KLD:   0.000454
 5.0%   KLD:   0.000123
 1.0%   KLD:   0.000016
 0.1%   KLD:   0.000002
Minimum KLD:  -0.000066

====== Token probability statistics ======
Mean    Δp: -0.213 ± 0.017 %
Maximum Δp: 99.434%
99.9%   Δp: 46.017%
99.0%   Δp: 15.815%
95.0%   Δp:  7.191%
90.0%   Δp:  4.217%
75.0%   Δp:  0.866%
Median  Δp: -0.002%
25.0%   Δp: -0.963%
10.0%   Δp: -4.442%
 5.0%   Δp: -7.884%
 1.0%   Δp: -20.542%
 0.1%   Δp: -61.177%
Minimum Δp: -99.506%
RMS Δp    :  6.427 ± 0.059 %
Same top p: 90.779 ± 0.075 %

Without NVFP4 Repack:

====== Perplexity statistics ======
Mean PPL(Q)                   :   7.088015 ±   0.047272
Mean PPL(base)                :   6.900856 ±   0.045374
Cor(ln(PPL(Q)), ln(PPL(base))):  98.68%
Mean ln(PPL(Q)/PPL(base))     :   0.026760 ±   0.001081
Mean PPL(Q)/PPL(base)         :   1.027121 ±   0.001111
Mean PPL(Q)-PPL(base)         :   0.187159 ±   0.007769

====== KL divergence statistics ======
Mean    KLD:   0.054489 ±   0.000910
Maximum KLD:  20.432301
99.9%   KLD:   4.555052
99.0%   KLD:   0.521524
95.0%   KLD:   0.151849
90.0%   KLD:   0.087985
Median  KLD:   0.017979
10.0%   KLD:   0.000450
 5.0%   KLD:   0.000121
 1.0%   KLD:   0.000016
 0.1%   KLD:   0.000002
Minimum KLD:  -0.000051

====== Token probability statistics ======
Mean    Δp: -0.209 ± 0.017 %
Maximum Δp: 99.650%
99.9%   Δp: 46.285%
99.0%   Δp: 15.675%
95.0%   Δp:  7.215%
90.0%   Δp:  4.196%
75.0%   Δp:  0.861%
Median  Δp: -0.002%
25.0%   Δp: -0.963%
10.0%   Δp: -4.445%
 5.0%   Δp: -7.878%
 1.0%   Δp: -20.604%
 0.1%   Δp: -57.880%
Minimum Δp: -99.882%
RMS Δp    :  6.386 ± 0.060 %
Same top p: 90.855 ± 0.075 %
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