Qwen3.8-27B-Fable-Distill — GGUF
| Model | ARC Challenge | ARC Challenge (Easy) | BoolQ |
|---|---|---|---|
| Qwen3.8-27B | 0.591 | 0.782 | 0.896 |
| Qwen3.8-27B-Fable-Distill | 0.637 | 0.832 | 0.911 |
As always, big thank you to @nightmedia for the benchmarks
GGUF conversions of TeichAI/Qwen3.8-27B-Fable-Distill,
a BF16 finetune of Qwen3.8-27B (base: Qwen/Qwen3.8-27B) trained with Unsloth + TRL.
The model was trained on a public set of chat and agent traces from Fable 5 as well as a much larger corpus of private personal Fable 5 data.
Converted with llama.cpp b6b4344e.
MTP head kept at BF16
This model ships a multi-token-prediction (nextn) head, and every quant here keeps that head unquantized at BF16 while the other 64 layers are quantized normally:
qwen35.block_count = 65 # 64 transformer layers + 1 MTP layer
qwen35.nextn_predict_layers = 1
blk.64.* = bf16 # 424.7M params, left alone
Files
| File | Bits | Size | Notes |
|---|---|---|---|
BF16/…-BF16-*.gguf |
16 | ~55 GB | Full precision, split into shards. Convert your own quants from this. |
…-Q8_0.gguf |
8 | ~29 GB | Near-lossless. |
…-Q6_K.gguf |
6 | ~23 GB | Very close to Q8_0 at meaningfully smaller size. |
…-Q5_K_M.gguf |
5 | ~20 GB | Strong quality/size balance. |
…-Q5_K_S.gguf |
5 | ~19 GB | |
…-Q4_K_M.gguf |
4 | ~17 GB | Recommended default for most users. |
…-Q4_K_S.gguf |
4 | ~16 GB | Slightly smaller than Q4_K_M. |
…-IQ4_NL.gguf |
4 | ~16 GB | Non-linear 4-bit. |
…-IQ4_XS.gguf |
4 | ~16 GB | Smallest of the 4-bit family. |
…-Q3_K_L.gguf |
3 | ~15 GB | |
…-Q3_K_M.gguf |
3 | ~14 GB | |
…-Q3_K_S.gguf |
3 | ~13 GB | |
…-Q2_K.gguf |
2 | ~11 GB | Noticeable quality loss. |
mmproj-F32.gguf |
32 | 1.8 GB | Vision projector, full precision. |
mmproj-BF16.gguf |
16 | 0.9 GB | Vision projector, bfloat16. |
mmproj-F16.gguf |
16 | 0.9 GB | Vision projector, float16. Fine for nearly everyone. |
Usage
Text:
llama-cli -m Qwen3.8-27B-Fable-Distill-Q4_K_M.gguf -c 8192 -p "Hello"
Vision — pass the projector alongside the model:
llama-mtmd-cli -m Qwen3.8-27B-Fable-Distill-Q4_K_M.gguf \
--mmproj mmproj-F16.gguf \
--image photo.jpg -p "Describe this image."
Server:
llama-server -m Qwen3.8-27B-Fable-Distill-Q4_K_M.gguf --mmproj mmproj-F16.gguf
Server + MTP:
llama-server -m Qwen3.8-27B-Fable-Distill-Q4_K_M.gguf --mmproj mmproj-F16.gguf --spec-type draft-mtp --spec-draft-n-max 3
Notes
- The model is multimodal (image-text-to-text). Without an
mmproj-*.ggufyou get a text-only model. Three precisions are provided;F16is the usual choice,BF16matches the source weights' dtype, andF32is there if you want the projector left entirely unquantized. - Qwen3.5-family chat template with thinking support: it accepts
enable_thinkingand areasoning_effortoflow,mediumorxhigh(the template's own default isxhigh, which thinks at length every turn). - Base model sampling recommendations:
temperature 1.0,top_p 0.95,top_k 20.
The data for this model was easily formatted, validated, and masked using Teich
This qwen3_5 model was trained 2x faster with Unsloth and Huggingface's TRL library.