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nunchaku-ai/
nunchaku-qwen-image

Name: nunchaku-qwen-image
Availability: InStock

mit-han-lab/svdquant-datasets

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This repository contains Nunchaku-quantized versions of Qwen-Image, designed to generate high-quality images from text prompts, advances in complex text rendering. It is optimized for efficient inference while maintaining minimal loss in performance.

News

[2025-08-27] 🔥 Release 4-bit 4/8-step lightning Qwen-Image!
[2025-08-15] 🚀 Release 4-bit SVDQuant quantized Qwen-Image model with rank 32 and 128!

Model Details

Model Description

Developed by: Nunchaku Team
Model type: text-to-image
License: apache-2.0
Quantized from model: Qwen-Image

Model Files

Data Type: INT4 for non-Blackwell GPUs (pre-50-series), NVFP4 for Blackwell GPUs (50-series). Rank: r32 for faster inference, r128 for better quality but slower inference.

Base Models

Standard inference speed models for general use

Data Type	Rank	Model Name
INT4	r32	`svdq-int4_r32-qwen-image.safetensors`
	r128	`svdq-int4_r128-qwen-image.safetensors`
NVFP4	r32	`svdq-fp4_r32-qwen-image.safetensors`
	r128	`svdq-fp4_r128-qwen-image.safetensors`

4-Step Distilled Models

4-step distilled models fused with Qwen-Image-Lightning-4steps-V1.0 LoRA using LoRA strength = 1.0

Data Type	Rank	Model Name	Comment
INT4	r32	`svdq-int4_r32-qwen-image-lightningv1.0-4steps.safetensors`	Fused with Qwen-Image-Lightning-4steps-V1.0 LoRA
	r128	`svdq-int4_r128-qwen-image-lightningv1.0-4steps.safetensors`	Fused with Qwen-Image-Lightning-4steps-V1.0 LoRA. Better quality, slower inference
NVFP4	r32	`svdq-fp4_r32-qwen-image-lightningv1.0-4steps.safetensors`	Fused with Qwen-Image-Lightning-4steps-V1.0 LoRA
	r128	`svdq-fp4_r128-qwen-image-lightningv1.0-4steps.safetensors`	Fused with Qwen-Image-Lightning-4steps-V1.0 LoRA. Better quality, slower inference

8-Step Distilled Models

8-step distilled models fused with Qwen-Image-Lightning-8steps-V1.1 LoRA using LoRA strength = 1.0

Data Type	Rank	Model Name	Comment
INT4	r32	`svdq-int4_r32-qwen-image-lightningv1.1-8steps.safetensors`	Fused with Qwen-Image-Lightning-8steps-V1.1 LoRA
	r128	`svdq-int4_r128-qwen-image-lightningv1.1-8steps.safetensors`	Fused with Qwen-Image-Lightning-8steps-V1.1 LoRA. Better quality, slower inference
NVFP4	r32	`svdq-fp4_r32-qwen-image-lightningv1.1-8steps.safetensors`	Fused with Qwen-Image-Lightning-8steps-V1.1 LoRA
	r128	`svdq-fp4_r128-qwen-image-lightningv1.1-8steps.safetensors`	Fused with Qwen-Image-Lightning-8steps-V1.1 LoRA. Better quality, slower inference

Model Sources

Inference Engine: nunchaku
Quantization Library: deepcompressor
Paper: SVDQuant: Absorbing Outliers by Low-Rank Components for 4-Bit Diffusion Models
Demo: demo.nunchaku.tech

Usage

Diffusers Usage: See qwen-image.py and qwen-image-lightning.py.
ComfyUI Usage: See nunchaku-qwen-image.json.

Performance

Citation

bibtex

@inproceedings{
  li2024svdquant,
  title={SVDQuant: Absorbing Outliers by Low-Rank Components for 4-Bit Diffusion Models},
  author={Li*, Muyang and Lin*, Yujun and Zhang*, Zhekai and Cai, Tianle and Li, Xiuyu and Guo, Junxian and Xie, Enze and Meng, Chenlin and Zhu, Jun-Yan and Han, Song},
  booktitle={The Thirteenth International Conference on Learning Representations},
  year={2025}
}

nunchaku-ai/nunchaku-qwen-image