Qwen3.8 · 27B

_{EXL3 · 4.5 bpw · 18.7 GB · Dense}

[!NOTE] An ExLlamaV3 build of Qwen/Qwen3.8-27B at 4.5 bits per weight. See Quants for sibling repos at other bit‑widths or browse the collection.

Quants

BPW	Head bits	Calibration rows	Size	Status
3.8	8	250	16.6 GB	link
4.5	8	250	18.7 GB	this repo

Inference

Loader	Use it for
TabbyAPI	OpenAI‑compatible HTTP server. Drop‑in for OpenAI clients.
text‑generation‑webui	Local chat UI. Pick the ExLlamaV3 loader from the model dropdown.
ExLlamaV3	Direct Python API for embedding the model in your own code or pipeline.

Download

pip install -U huggingface_hub

hf download \
  Honkware/Qwen3.8-27B-exl3-4.5bpw \
  --local-dir ./Qwen3.8-27B-exl3-4.5bpw

Quantization recipe _{(advanced, embedded in quantization_config.json)}

Setting	Value
Format	`EXL3`
Bits per weight	`4.5`
Head bits	`8`
Calibration rows	`250`
Codebook	`mul1`
Out‑scales	`always`
Parallel mode	`enabled`

The codebook is recorded in the weights, so loaders pick it up with no configuration. mul1 needs ExLlamaV3 v0.0.3 or newer; an older build ignores the marker and decodes the weights with the wrong codebook.

Loaded automatically by every ExLlamaV3 loader; reproduced here for searchability.

License & use

[!IMPORTANT] Use and license follow the base model. Quantization adds no additional restrictions. Refer to the upstream repository for terms, citation, and safety documentation.

_{Quantized with BlockQuant · convention {org}/{model}-exl3-{bpw}bpw}