Qwen3.5-4B-DFlash-GGUF

<center> <div style="display:flex; justify-content:center; align-items:center; gap:2%; max-width:560px; margin:0 auto;"> <a href="https://atomic.chat?utm_source=huggingface&utm_medium=referral&utm_campaign=hf_qwen3_5_4b_dflash&utm_content=btn_atomic" style="flex:0 1 auto; min-width:0;"><img src="https://huggingface.co/AtomicChat/Qwen3.5-4B-DFlash-GGUF/resolve/main/pill_atomic_v3.png" alt="Atomic Chat" style="width:100%; height:auto; max-width:186px;"></a> <a href="https://discord.gg/8wGSsvmg4V" style="flex:0 1 auto; min-width:0;"><img src="https://huggingface.co/AtomicChat/Qwen3.5-4B-DFlash-GGUF/resolve/main/pill_discord_v3.png" alt="Join Discord" style="width:100%; height:auto; max-width:184px;"></a> <a href="https://github.com/AtomicBot-ai/Atomic-Chat" style="flex:0 1 auto; min-width:0;"><img src="https://huggingface.co/AtomicChat/Qwen3.5-4B-DFlash-GGUF/resolve/main/pill_github_v3.png" alt="GitHub" style="width:100%; height:auto; max-width:141px;"></a> </div> <br/> <img src="https://huggingface.co/AtomicChat/Qwen3.5-4B-DFlash-GGUF/resolve/main/hero.png" alt="Qwen3.5 4B Dflash" style="width:100%; max-width:100%; height:auto; margin-bottom:0.6em;"/> <div style="display:flex; justify-content:center; gap:0.5em;"> <a href="https://huggingface.co/z-lab/Qwen3.5-4B-DFlash"><strong>Base model: z-lab/Qwen3.5-4B-DFlash</strong></a> </div> </center>

Qwen3.5 4B Dflash, self-quantized to GGUF by Atomic Chat. Built straight from Z Lab's original weights with a per-tensor importance matrix, so this is not a repack of somebody else's files. Runs fully offline.

Highlights

• 0.6B parameters: the weights this repo quantizes.
• Context length: 262,144 tokens (256K), as published by Z Lab.
• 6 layers: Dense decoder, hybrid sliding-window (4096) and global attention.
• Full imatrix ladder: every quant is calibrated with an importance matrix.

[!NOTE] These GGUFs are self-quantized from the original weights, not a repack. The importance matrix keeps low-bit quants closer to the full-precision model.

[!IMPORTANT] Always pass --jinja so the Qwen3.5 4B Dflash chat template is applied. Without it the model can emit malformed turns.

Model Overview

Choosing a quant

[!TIP] Pick the largest file that fits your (V)RAM with room for context. Q8_0 is the sweet spot for most setups; Q6_K or Q8_0 for maximum fidelity.

Get started

Run Qwen3.5 4B Dflash locally with:

• Atomic Chat: the easiest path. Open the app, search AtomicChat/Qwen3.5-4B-DFlash-GGUF, pick a quant, hit Use this model.
• llama.cpp: llama-server -hf AtomicChat/Qwen3.5-4B-DFlash-GGUF:Q8_0 --jinja -c 8192
• Ollama: ollama run hf.co/AtomicChat/Qwen3.5-4B-DFlash-GGUF:Q8_0
• LM Studio / Jan: search the repo id, download any quant.

Best practices

The base model card does not state sampling defaults.

Run in llama.cpp

git clone https://github.com/ggml-org/llama.cpp
cmake llama.cpp -B llama.cpp/build -DBUILD_SHARED_LIBS=OFF -DGGML_CUDA=ON
cmake --build llama.cpp/build --config Release -j --target llama-cli llama-server

./llama.cpp/build/bin/llama-server \
    -hf AtomicChat/Qwen3.5-4B-DFlash-GGUF:Q8_0 \
    --jinja -ngl 99 -c 8192 -fa on

How these were made

1. Download z-lab/Qwen3.5-4B-DFlash (original weights).
2. Convert to f16 GGUF with llama.cpp.
3. Build an importance matrix over our calibration corpus.
4. Quantize the ladder with --imatrix.

License

Original model by Z Lab, released under the Apache 2.0 license. Quantized by Atomic Chat.