Qwen3-VL-4B-Instruct-NVFP4

Qwen3-VL-4B-Instruct-NVFP4

This is a quantized version of Qwen/Qwen3-VL-4B-Instruct using SmoothQuant + NVFP4 across all text linear layers.

Quantization Strategy

SmoothQuant

Applied with strength 0.8 for activation smoothing before quantization:

• Q/K/V projections ← input_layernorm
• Gate/Up projections ← post_attention_layernorm

Model Details

• Base Model: Qwen/Qwen3-VL-4B-Instruct (4.4B parameters)
• Quantization Method: compressed-tensors (llm-compressor)
• Model Size: ~4.1 GB (reduced from ~8.9 GB BF16, ~54% compression)
• Calibration: 512 samples from flickr30k, max_seq_length=2048

Usage with vLLM

vllm serve JEILDLWLRMA/Qwen3-VL-4B-Instruct-NVFP4 \
    --quantization compressed-tensors \
    --kv-cache-dtype fp8 \
    --gpu-memory-utilization 0.9 \
    --max-model-len 8192

from vllm import LLM, SamplingParams

llm = LLM(
    model="JEILDLWLRMA/Qwen3-VL-4B-Instruct-NVFP4",
    quantization="compressed-tensors",
    trust_remote_code=True,
    kv_cache_dtype="fp8",
    max_model_len=8192,
)

sampling_params = SamplingParams(temperature=0.7, top_p=0.95)
prompts = ["Your prompt here"]
outputs = llm.generate(prompts, sampling_params)

Usage with Transformers

from transformers import AutoProcessor, Qwen3VLForConditionalGeneration
import torch

model_id = "JEILDLWLRMA/Qwen3-VL-4B-Instruct-NVFP4"
processor = AutoProcessor.from_pretrained(model_id)
model = Qwen3VLForConditionalGeneration.from_pretrained(
    model_id,
    torch_dtype=torch.bfloat16,
    device_map="auto",
    trust_remote_code=True,
)

License

Apache 2.0, same as the base model.