Unsloth-Qwen3.6-27B-NVFP4 - GGUF

Quantized GGUF versions of unsloth/Qwen3.6-27B-NVFP4 from 2026-07-10. These were generated using llama.cpp (b9859).

  • Unsloth-Qwen3.6-27B-NVFP4-A.gguf: The NVFP4 group 1 layers are preserved. The FP8 group 0 linear-attention (attn_qkv, ssm_out) and tail-MLP (layers 56–63) are converted to NVFP4, while the remaining layers are kept at Q8. The MTP draft layer is preserved at BF16. This was generated from NVFP4-Q8 using a modified llama-quantize to allow re-quantizing Q8-quantized layers to NVFP4.
  • Unsloth-Qwen3.6-27B-NVFP4-Q8.gguf: The NVFP4 group 1 layers are preserved, while the FP8 group 0 layers are converted to Q8. This was generated using a modified convert_hf_to_gguf.py to support Unsloth's differing groups.
  • Unsloth-Qwen3.6-27B-NVFP4-BF16.gguf: The NVFP4 group 1 layers are preserved, while the FP8 group 0 layers are upcast to BF16. This version is not published because it is redundant with NVFP4-Q8.

Quantizations provided

File Quantization Size
Unsloth-Qwen3.6-27B-NVFP4-A.gguf Mixed Q8/NVFP4 group 0, NVFP4 group 1 20.1 GB
Unsloth-Qwen3.6-27B-NVFP4-Q8.gguf Q8 group 0, NVFP4 group 1 23.2 GB

Perplexity test

I tested perplexity using llama-perplexity and Salesforce's wikitext-2-raw-v1.

File Ctx PPL
Unsloth-Qwen3.6-27B-NVFP4-A.gguf 512 7.5789 ± 0.05260
Unsloth-Qwen3.6-27B-NVFP4-Q8.gguf 512 7.3792 ± 0.05057
Unsloth-Qwen3.6-27B-NVFP4-BF16.gguf 512 7.3702 ± 0.05052

Evaluation

The following models were evaluated for a fair comparison of capability, size and speed.

Model Quantization Size Reason
CodeFault/Nvidia-Qwen3.6-27B-MTP-GGUF NVFP4-A1 17.9 GB Alternative NVFP4 quant.
unsloth/Qwen3.6-27B-MTP-GGUF UD-Q5_K_XL 20.4 GB Closest non-NVFP4 in size to NVFP4-A.
unsloth/Qwen3.6-27B-MTP-GGUF UD-Q6_K_XL 26 GB Closest non-NVFP4 in size to NVFP4-Q8.
unsloth/Qwen3.6-27B-NVFP4 NVFP42 25.4 GB Previous NVFP4 checkpoint from 2026-05-31.

1: My quantization of nvidia/Qwen3.6-27B-MTP.

2: unsloth/Qwen3.6-27B-NVFP4 does not provide a GGUF. I used llama.cpp's conversion which passes through Unsloth's NVFP4 tensors. This is Unsloth's previous version from 2026-05-31.

CodeFault
Unsloth
NVFP4-A
CodeFault
Unsloth
NVFP4-Q8
CodeFault
Nvidia
NVFP4-A
Unsloth
NVFP4
(2026-05-31)
Unsloth
UD-Q5_K_XL
Unsloth
UD-Q6_K_XL
Coding
HumanEval 0.8354 ± 0.0290 0.8293 ± 0.0295 0.8293 ± 0.0295 0.8110 ± 0.0307 0.8598 ± 0.0272 0.8537 ± 0.0277
HumanEval+ 0.7622 ± 0.0333 0.7622 ± 0.0333 0.7683 ± 0.0330 0.7744 ± 0.0327 0.7866 ± 0.0321 0.7805 ± 0.0324
MBPP 0.7540 ± 0.0193 0.7720 ± 0.0188 0.7280 ± 0.0199 0.7420 ± 0.0196 0.7540 ± 0.0193 0.7540 ± 0.0193
MBPP+ 0.8836 ± 0.0165 0.8915 ± 0.0160 0.8783 ± 0.0168 0.8995 ± 0.0155 0.8968 ± 0.0157 0.8836 ± 0.0165
Instruction
IFEval 0.8540 ± 0.0152 0.8577 ± 0.0150 0.8558 ± 0.0151 0.8447 ± 0.0156 0.8558 ± 0.0151 0.8447 ± 0.0156
Knowledge
ARC-Challenge 0.9735 ± 0.0047 0.9718 ± 0.0048 0.9710 ± 0.0049 0.9710 ± 0.0049 0.9684 ± 0.0051 0.9710 ± 0.0049
MMLU-Pro 0.8291 ± 0.0034 0.8288 ± 0.0034 0.8250 ± 0.0034 0.8293 ± 0.0033 0.8319 ± 0.0033
STEM & Reasoning
BIG-Bench Hard 0.9201 ± 0.0032 0.9174 ± 0.0032 0.9149 ± 0.0032 0.9131 ± 0.0033 0.9220 ± 0.0031 0.9214 ± 0.0031
GPQA Diamond
flexible
0.7929 ± 0.0289 0.7929 ± 0.0289 0.7929 ± 0.0289 0.8182 ± 0.0275 0.8131 ± 0.0278 0.7778 ± 0.0296
GSM8K 0.9151 ± 0.0077 0.9136 ± 0.0077 0.9196 ± 0.0075 0.9098 ± 0.0079 0.9128 ± 0.0078 0.9158 ± 0.0076
Hendrycks Math 0.3698 ± 0.0066 0.3624 ± 0.0066 0.3438 ± 0.0065 0.3662 ± 0.0066 0.3778 ± 0.0067 0.3876 ± 0.0067

NOTICE: These evals are actively running.

These evaluations were run using lm_eval. The models were run in instruct (non-thinking) mode with the following parameters in llama-server (b9775):

ctx-size = 32768
cache-type-k = q8_0
cache-type-v = q8_0
top-p = 0.8
top-k = 20
min-p = 0
presence-penalty = 1.5
spec_type = draft-mtp
spec_draft_n_max = 2
chat-template-kwargs = {"enable_thinking":false}

Benchmarks

Model Quant MTP n-max Prompt Len Output Len Acceptance Rate pp/s tg/s
CodeFault/Unsloth-Qwen3.6-27B-NVFP4-GGUF NVFP4-A 267 6654 2205.4 70.6
CodeFault/Unsloth-Qwen3.6-27B-NVFP4-GGUF NVFP4-A 1 267 7240 0.880 1880.7 91.8
CodeFault/Unsloth-Qwen3.6-27B-NVFP4-GGUF NVFP4-A 2 267 5842 0.856, 0.712 1853.9 109.8
CodeFault/Unsloth-Qwen3.6-27B-NVFP4-GGUF NVFP4-A 3 267 5711 0.852, 0.712, 0.596 1782.3 119.7
CodeFault/Unsloth-Qwen3.6-27B-NVFP4-GGUF NVFP4-A 4 267 9709 0.841, 0.688, 0.556, 0.462 1738.4 122.7
CodeFault/Unsloth-Qwen3.6-27B-NVFP4-GGUF NVFP4-Q8 267 6544 2077.4 63.0
CodeFault/Unsloth-Qwen3.6-27B-NVFP4-GGUF NVFP4-Q8 1 267 6596 0.876 1742.8 84.3
CodeFault/Unsloth-Qwen3.6-27B-NVFP4-GGUF NVFP4-Q8 2 267 7088 0.868, 0.724 1766.4 102.8
CodeFault/Unsloth-Qwen3.6-27B-NVFP4-GGUF NVFP4-Q8 3 267 5903 0.831, 0.675, 0.543 1785.1 108.8
CodeFault/Unsloth-Qwen3.6-27B-NVFP4-GGUF NVFP4-Q8 4 267 5785 0.837, 0.684, 0.563, 0.471 1771.2 116.3
CodeFault/Nvidia-Qwen3.6-27B-NVFP4-GGUF NVFP4-A 267 8676 2225.1 76.6
CodeFault/Nvidia-Qwen3.6-27B-NVFP4-GGUF NVFP4-A 1 267 5958 0.879 1877.0 99.5
CodeFault/Nvidia-Qwen3.6-27B-NVFP4-GGUF NVFP4-A 2 267 6708 0.856, 0.701 1897.2 119.1
CodeFault/Nvidia-Qwen3.6-27B-NVFP4-GGUF NVFP4-A 3 267 6900 0.855, 0.699, 0.559 1950.4 128.7
CodeFault/Nvidia-Qwen3.6-27B-NVFP4-GGUF NVFP4-A 4 267 5635 0.836, 0.681, 0.567, 0.483 1862.6 137.6
unsloth/Qwen3.6-27B-NVFP4 NVFP43 267 7347 2056.5 57.6
unsloth/Qwen3.6-27B-NVFP4 NVFP43 1 267 6826 0.843 1749.9 74.9
unsloth/Qwen3.6-27B-NVFP4 NVFP43 2 267 8142 0.851, 0.685 1794.7 90.1
unsloth/Qwen3.6-27B-NVFP4 NVFP43 3 267 7612 0.837, 0.671, 0.541 1787 96.4
unsloth/Qwen3.6-27B-NVFP4 NVFP43 4 267 7621 0.817, 0.620, 0.485, 0.400 1772.4 96.5
unsloth/Qwen3.6-27B-MTP-GGUF UD-Q5_K_XL 267 7866 1522.0 64.0
unsloth/Qwen3.6-27B-MTP-GGUF UD-Q5_K_XL 1 267 6977 0.866 1296.4 99.0
unsloth/Qwen3.6-27B-MTP-GGUF UD-Q5_K_XL 2 267 7418 0.850, 0.686 1383.8 115.0
unsloth/Qwen3.6-27B-MTP-GGUF UD-Q5_K_XL 3 267 9204 0.850, 0.684, 0.565 1305.6 118.9
unsloth/Qwen3.6-27B-MTP-GGUF UD-Q5_K_XL 4 267 7600 0.855, 0.677, 0.565, 0.472 1294.0 123.5
unsloth/Qwen3.6-27B-MTP-GGUF UD-Q6_K_XL 267 7180 1257.3 53.7
unsloth/Qwen3.6-27B-MTP-GGUF UD-Q6_K_XL 1 267 5868 0.876 1249.1 84.8
unsloth/Qwen3.6-27B-MTP-GGUF UD-Q6_K_XL 2 267 6104 0.864, 0.701 1232.8 102.2
unsloth/Qwen3.6-27B-MTP-GGUF UD-Q6_K_XL 3 267 5000 0.847, 0.688, 0.563 1228.7 109
unsloth/Qwen3.6-27B-MTP-GGUF UD-Q6_K_XL 4 267 7060 0.852, 0.703, 0.577, 0.474 1052.5 116.8

3: This is Unsloth's previous version from 2026-05-31.

These benchmarks were run on an RTX 5090 (limited to 480 W) using llama-cli (b9775) with the CUDA driver and a prompt to generate an Ansible playbook.

Serving with llama.cpp

It has a max context size of 262,114. This can be served using:

llama-server \
-hf CodeFault/Unsloth-Qwen3.6-27B-NVFP4-GGUF \
-hff Unsloth-Qwen3.6-27B-NVFP4-A.gguf \
--temp 0.6 \
--top-p 0.95 \
--top-k 20 \
--repeat-penalty 1.1 \
--spec-type draft-mtp \
--spec-draft-n-max 3
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