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 Chungulus/Qwen3.8-27B-Q2_K-GGUF:Q2_K
# Run inference directly in the terminal:
llama cli -hf Chungulus/Qwen3.8-27B-Q2_K-GGUF:Q2_K
Install from WinGet (Windows)
winget install llama.cpp
# Start a local OpenAI-compatible server with a web UI:
llama serve -hf Chungulus/Qwen3.8-27B-Q2_K-GGUF:Q2_K
# Run inference directly in the terminal:
llama cli -hf Chungulus/Qwen3.8-27B-Q2_K-GGUF:Q2_K
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 Chungulus/Qwen3.8-27B-Q2_K-GGUF:Q2_K
# Run inference directly in the terminal:
./llama-cli -hf Chungulus/Qwen3.8-27B-Q2_K-GGUF:Q2_K
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 Chungulus/Qwen3.8-27B-Q2_K-GGUF:Q2_K
# Run inference directly in the terminal:
./build/bin/llama-cli -hf Chungulus/Qwen3.8-27B-Q2_K-GGUF:Q2_K
Use Docker
docker model run hf.co/Chungulus/Qwen3.8-27B-Q2_K-GGUF:Q2_K
Quick Links

Qwen3.8-27B Q2_K GGUF

This repository contains one independently downloadable Q2_K GGUF of Qwen/Qwen3.8-27B. It is an unmodified vanilla quantization, not a fine-tune, merge, ablation, alignment change, or chat-template modification.

The source weights are pinned to 1d4bf0f2ff6012fd82039f2fa52739d0dd7c60c0. The official checkpoint's internal Qwen3_5ForConditionalGeneration / qwen3_5 architecture identifier does not mean this is a Qwen3.5 model.

Files and conversion

  • Main model: Qwen3.8-27B-Q2_K.gguf (10.865 GB decimal)
  • Vision projector: mmproj-Qwen3.8-27B-F16.gguf
  • Complete repository size: 11.805 GB decimal
  • Quantization: Q2_K using llama.cpp K/IQ quantization
  • llama.cpp revision: 5f754ea0e2fd21e1213db7ebebfd65d938d9d69c
  • Calibration: none for K-quants; representative local prompts where required by IQ conversion
  • Source inventory: 1,199 tensors, including 333 vision tensors and 15 source MTP tensors

Validated component status

  • Text generation: passed
  • Tool calling: passed all five native-format cases
  • Vision and video: passed all three deterministic local-image cases
  • Thinking controls and chat template: preserved and checked against the locked source
  • Hybrid Gated DeltaNet/full-attention structure: retained
  • MTP tensors and metadata: retained; speculative acceleration is not advertised
  • Per-file runtime smoke: passed at 18.920043894501834 generated tokens/s on the validation host
  • Weight SHA-256: 185bc2aa1f15a34ef9d2b14f51f9edda69f4e43b5ee9e39e3c2ae8c439ddd1a5
  • Validation lineage: the same bytes passed in the combined release at f519a212d6c15cd3292b6ca835dd8ebf235642c0

validation_result.json records the exact per-file smoke result and its inherited aggregate functional gates. These split repositories do not claim a new benchmark run; they preserve byte-identical, already-validated artifacts.

Inference

git clone https://github.com/ggml-org/llama.cpp
cd llama.cpp && git checkout 5f754ea0e2fd21e1213db7ebebfd65d938d9d69c
cmake -S . -B build -DGGML_METAL=ON -DCMAKE_BUILD_TYPE=Release
cmake --build build --config Release -j

hf download Chungulus/Qwen3.8-27B-Q2_K-GGUF --local-dir ../qwen38-q2_k
cd ../qwen38-q2_k
../llama.cpp/build/bin/llama-mtmd-cli \
  -m ./Qwen3.8-27B-Q2_K.gguf \
  --mmproj ./mmproj-Qwen3.8-27B-F16.gguf \
  -p 'Describe the image.' --image ./image.png

Allow at least approximately 15 GB of available memory for the model, vision projector, and modest runtime overhead; KV-cache needs grow with context. This is planning guidance, not a measured peak-memory guarantee.

Use the source chat-template controls for enable_thinking, reasoning_effort, and preserve_thinking, together with Qwen's native tool-call format.

Limitations

Quantization can reduce quality, particularly at lower bit widths. The longest recorded validation prompt was 73 tokens; do not infer that the architectural maximum context was tested. A runtime must support the Qwen3.8 hybrid language graph, vision tower/projector, tokenizer, and retained MTP metadata rather than loading only a single language tensor.

License and attribution

The parent model and this vanilla quantization use the source model's Apache-2.0 license. See Qwen/Qwen3.8-27B.

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