---
license: apache-2.0
base_model: Qwen/Qwen3.5-4B
pipeline_tag: image-text-to-text
library_name: rkllm
tags:
- rkllm
- rockchip
- rk3576
- rk3588
- qwen
- qwen3.5
- multimodal
---

# Qwen3.5-4B-RKLLM

RKLLM/RKNN-converted Qwen3.5-4B multimodal artifacts for Rockchip RK3576 and RK3588 NPUs.

This is a VLM conversion: each supported platform requires both the `.rkllm` language model and the matching `.rknn` vision encoder. The pair must come from the same platform directory. These are hardware-specific artifacts, not Transformers checkpoints.

## Base model

- Upstream model: [Qwen/Qwen3.5-4B](https://huggingface.co/Qwen/Qwen3.5-4B)
- License: Apache-2.0
- Model type: VLM (vision-language model)

## Conversion and variants

### Toolkit version

**RKLLM Toolkit: v1.3.0** · **RKNN vision conversion: paired `.rknn` encoder**

Use a matching pair for the exact target SoC.

| Target | Quantization | RKLLM language model | RKLLM SHA256 | RKNN vision encoder | RKNN SHA256 |
| --- | --- | --- | --- | --- | --- |
| RK3576 | W4A16 (g128) | [Qwen3.5-4B_RK3576_w4a16_g128.rkllm](RK3576/Qwen3.5-4B_RK3576_w4a16_g128.rkllm) | `aa4d34b42752a0e491ed891ce4b7f32a745631601a65b175f743f971bdb33482` | [Qwen3.5-4B_vision_RK3576.rknn](RK3576/Qwen3.5-4B_vision_RK3576.rknn) | `6692f52adaa7ee0ba892c7cbba01979750cb82cff8061a571f56e9d84c6d98a2` |
| RK3576 | W8A8 | [Qwen3.5-4B_RK3576_w8a8.rkllm](RK3576/Qwen3.5-4B_RK3576_w8a8.rkllm) | `736f4b1065b481bae9cbd86e6c9ed30222abba9c5a3cb2d8d68dd92037d82dfe` | [Qwen3.5-4B_vision_RK3576.rknn](RK3576/Qwen3.5-4B_vision_RK3576.rknn) | `6692f52adaa7ee0ba892c7cbba01979750cb82cff8061a571f56e9d84c6d98a2` |
| RK3588 | W8A8 | [Qwen3.5-4B_RK3588_w8a8.rkllm](RK3588/Qwen3.5-4B_RK3588_w8a8.rkllm) | `715566bbee72b25d8c4912f6cf6256a8ac264a754511573a99a541487bbc06b4` | [Qwen3.5-4B_vision_RK3588.rknn](RK3588/Qwen3.5-4B_vision_RK3588.rknn) | `c286ef69266c11a2a2cedd881ad6a40415c17c8924962f07454359bb6d60e2ba` |

The root `Qwen3.5-4B_vision.onnx` is the vision conversion input; use the platform-specific `.rknn` encoder for deployment.

## Usage

Download both files for the target platform:

```bash
hf download HanzoHuang/Qwen3.5-4B-RKLLM \
  RK3576/Qwen3.5-4B_RK3576_w4a16_g128.rkllm \
  RK3576/Qwen3.5-4B_vision_RK3576.rknn \
  --local-dir Qwen3.5-4B-RKLLM
```

Use them with the RKLLM VLM runtime. For a Docker API, see [Hanzo-Huang/rkllm-docker](https://github.com/Hanzo-Huang/rkllm-docker) and set `MODEL_KIND=vlm` with both model files.

## Limitations

The vision encoder and language model are SoC-specific and must be kept as a matching pair. Validate image preprocessing, memory use, and runtime compatibility on your device.

## Acknowledgements

Thanks to the Qwen Team, Rockchip, and the RKLLM/RKNN community.