AtomicChat/Qwen3.5-9B-GGUF overview

---

license: apache-2.0

license_link: https://huggingface.co/Qwen/Qwen3.5-9B/blob/main/LICENSE

thumbnail: https://huggingface.co/AtomicChat/Qwen3.5-9B-GGUF/resolve/main/hero.png

base_model:

• Qwen/Qwen3.5-9B

base_model_relation: quantized

quantized_by: AtomicChat

pipeline_tag: text-generation

library_name: gguf

tags:

• atomic-chat
• qwen3.5
• qwen
• gguf
• llama.cpp
• quantized

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<a href="https://atomic.chat" style="flex:0 1 auto; min-width:0;"><img src="https://huggingface.co/AtomicChat/Qwen3.5-9B-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/Qwen3.5-9B-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/Qwen3.5-9B-GGUF/resolve/main/pill_github_v3.png" alt="GitHub" style="width:100%; height:auto; max-width:141px;"></a>

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<img src="https://huggingface.co/AtomicChat/Qwen3.5-9B-GGUF/resolve/main/hero.png" alt="Qwen3.5 9B" style="width:100%; max-width:100%; height:auto; margin-bottom:0.6em;"/>

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<a href="https://huggingface.co/Qwen/Qwen3.5-9B"><strong>Base model: Qwen/Qwen3.5-9B</strong></a>

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Qwen3.5 9B, self-quantized to GGUF by Atomic Chat. Built straight from Qwen's original weights with a per-tensor importance matrix, so this is not a repack of somebody else's files. Runs fully offline.

Highlights

• 9.7B parameters: the weights this repo quantizes.
• Context length: 262,144 tokens (256K), as published by Qwen.
• 32 layers: Dense decoder.
• Modalities: the base model handles Text, Image; this repo ships text-only quants, it carries no vision projector.
• Full imatrix ladder: every quant is calibrated with an importance matrix.
• Unified Vision-Language Foundation: Early fusion training on multimodal tokens achieves cross-generational parity with Qwen3 and outperforms Qwen3-VL models across reasoning, coding, agents, and visual understanding benchmarks.
• Efficient Hybrid Architecture: Gated Delta Networks combined with sparse Mixture-of-Experts deliver high-throughput inference with minimal latency and cost overhead.

> [!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 9B chat template is applied. Without it the model can emit malformed turns.

Model Overview

| Property | Value |

|---|---|

| Base model | Qwen/Qwen3.5-9B |

| Parameters | 9.7B |

| Layers | 32 |

| Context length | 262,144 tokens (256K) |

| Vocabulary | 248,320 |

| Modalities | Text, Image in the base model; text only in this repo, it ships no vision projector |

| Architecture | Dense decoder, 16 attention heads over 4 KV heads, Qwen3_5ForConditionalGeneration |

| This repo | GGUF quants (imatrix). Quants: Q4_K_M, UD-Q4_K_XL, Q5_K_M, Q6_K, Q8_0 |

<img src="https://huggingface.co/AtomicChat/Qwen3.5-9B-GGUF/resolve/main/benchmark.png" alt="Qwen3.5 9B benchmark scores" style="width:100%; max-width:900px;"/>

Scores are Qwen's published results for the base Qwen/Qwen3.5-9B, not our own measurements. Quantization preserves the large majority of this; Q4_K_M and up stay close to full precision.

Choosing a quant

| Quant | Size | Notes |

|---|---|---|

| Q4_K_M | 5.6 GB | Recommended default. Best balance of size, speed and quality. |

| UD-Q4_K_XL | 6.4 GB | Dynamic. Embeddings and output kept at Q8_0 for higher quality at a Q4 footprint. |

| Q5_K_M | 6.5 GB | Higher quality, low loss. |

| Q6_K | 7.4 GB | Near lossless, noticeably lighter than Q8_0. |

| Q8_0 | 9.5 GB | Effectively lossless, reference quality. |

> [!TIP]

> Pick the largest file that fits your (V)RAM with room for context. Q4_K_M or UD-Q4_K_XL is the sweet spot for most setups; Q6_K or Q8_0 for maximum fidelity.

Get started

Run Qwen3.5 9B locally with:

• Atomic Chat: the easiest path. Open the app, search AtomicChat/Qwen3.5-9B-GGUF, pick a quant, hit Use this model.
• llama.cpp: llama-server -hf AtomicChat/Qwen3.5-9B-GGUF:Q4_K_M --jinja -c 8192
• Ollama: ollama run hf.co/AtomicChat/Qwen3.5-9B-GGUF:Q4_K_M
• LM Studio / Jan: search the repo id, download any quant.

Best practices

| Parameter | Value |

|---|---|

| temperature | 1.0 |

| top_p | 0.95 |

| top_k | 20 |

| min_p | 0.0 |

| repetition_penalty | 1.0 |

Qwen's recommended sampling configuration for Qwen/Qwen3.5-9B.

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/Qwen3.5-9B-GGUF:Q4_K_M \
    --jinja -ngl 99 -c 8192 -fa on

How these were made

1. Download Qwen/Qwen3.5-9B (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.
5. UD-Q4_K_XL additionally pins the token-embedding and output tensors to Q8_0.

License

Original model by Qwen, released under the Apache 2.0 license. Full terms: Apache 2.0. Quantized by Atomic Chat.