Qwen3-VL-4B-Instruct-W4A16-AutoRound

Model Overview

This is a 4-bit quantized version of the powerful Qwen/Qwen3-VL-4B-Instruct vision-language model.

It was optimized using Intel's AutoRound algorithm, which calibrates weights for 800 iterations to minimize quantization loss. This version retains the original FP16 vision tower, ensuring that visual capabilities (OCR, spatial reasoning, chart analysis) remain degradation-free.

Quantization Specifications

• Method: AutoRound (Advanced Weight-Only Quantization)
• Scheme: W4A16 (4-bit weights, 16-bit activations)
• Symmetric: True
• Group Size: 128
• Vision Tower: Kept in FP16 (Unquantized for max accuracy)
• Calibration: 512 samples, 800 iterations

Quickstart

1. Installation

To use this model in its native AutoRound format, you need the auto-round library.

pip install auto-round transformers torch

2. Inference Code

from transformers import AutoModelForCausalLM, AutoTokenizer, AutoProcessor
from auto_round import AutoRoundConfig

model_id = "Vishva007/Qwen3-VL-4B-Instruct-W4A16-AutoRound"

# Load Model
model = AutoModelForCausalLM.from_pretrained(
    model_id,
    device_map="auto",
    trust_remote_code=True
)
processor = AutoProcessor.from_pretrained(model_id, trust_remote_code=True)

# Prepare Input
messages = [
    {
        "role": "user",
        "content": [
            {"type": "image", "image": "https://qianwen-res.oss-cn-beijing.aliyuncs.com/Qwen-VL/assets/demo.jpeg"},
            {"type": "text", "text": "Describe this image detailly."},
        ],
    }
]

text = processor.apply_chat_template(messages, tokenize=False, add_generation_prompt=True)
image_inputs, video_inputs = process_vision_info(messages)

inputs = processor(
    text=[text],
    images=image_inputs,
    videos=video_inputs,
    padding=True,
    return_tensors="pt",
).to(model.device)

# Generate
generated_ids = model.generate(**inputs, max_new_tokens=128)
print(processor.batch_decode(generated_ids, skip_special_tokens=True))

Citation

@article{cheng2023optimize,
  title={Optimize Weight Rounding via Signed Gradient Descent for the Quantization of LLMs},
  author={Cheng, Wenhua and Zhang, Weiwei and Shen, Haihao and Cai, Yiyang and He, Xin and Lv, Kaokao},
  journal={arXiv preprint arXiv:2309.05516},
  year={2023}
}