Model Architecture: Qwen3VLForConditionalGeneration
- Input: Text, Image
- Output: Text
Model Optimizations:
- Weight quantization: FP8
- Activation quantization: FP8
Release Date:
Version: 1.0
Model Developers:: Red Hat

Quantized version of Qwen/Qwen3-VL-32B-Instruct.

Model Optimizations

This model was obtained by quantizing the weights and activations of Qwen/Qwen3-VL-32B-Instruct to FP8 data type. This optimization reduces the number of bits per parameter from 16 to 8, reducing the disk size and GPU memory requirements by approximately 50%. Only the weights and activations of the linear operators within transformers blocks of the language model are quantized.

Deployment

Use with vLLM

Initialize vLLM server:

vllm serve RedHatAI/Qwen3-VL-32B-Instruct-FP8-block --tensor_parallel_size 2

Send requests to the server:

python

from openai import OpenAI

# Modify OpenAI's API key and API base to use vLLM's API server.
openai_api_key = "EMPTY"
openai_api_base = "http://<your-server-host>:8000/v1"

client = OpenAI(
    api_key=openai_api_key,
    base_url=openai_api_base,
)

model = "RedHatAI/Qwen3-VL-32B-Instruct-FP8-block"

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

outputs = client.chat.completions.create(
    model=model,
    messages=messages,
)

generated_text = outputs.choices[0].message.content
print(generated_text)

Creation

This model was quantized using the llm-compressor library as shown below.

Creation details

python

from transformers import AutoProcessor, Qwen3VLForConditionalGeneration

from llmcompressor import oneshot
from llmcompressor.modifiers.quantization import QuantizationModifier

# NOTE: Requires a minimum of transformers 4.57.0

MODEL_ID = "Qwen/Qwen3-VL-32B-Instruct"

# Load model.
model = Qwen3VLForConditionalGeneration.from_pretrained(MODEL_ID, torch_dtype="auto")
processor = AutoProcessor.from_pretrained(MODEL_ID)

# Configure the quantization algorithm and scheme.
# In this case, we:
#   * quantize the weights to fp8 with channel-wise quantization
#   * quantize the activations to fp8 with dynamic token activations
# NOTE: only datafree quantization is supported for Qwen3-VL-MoE currently
recipe = QuantizationModifier(
    targets="Linear",
    scheme="FP8_BLOCK",
    ignore=[
        "re:.*lm_head",
        "re:visual.*",
        "re:model.visual.*",
        "re:.*mlp.gate$",
    ],
)

# Apply quantization.
oneshot(model=model, recipe=recipe)

# Save to disk in compressed-tensors format.
SAVE_DIR = MODEL_ID.rstrip("/").split("/")[-1] + "-FP8-BLOCK"
model.save_pretrained(SAVE_DIR)
processor.save_pretrained(SAVE_DIR)

Evaluation

The model was evaluated on the OpenLLMv1 leaderboard task, using lm-evaluation-harness. vLLM was used for all evaluations.

Evaluation details

ChartQA

lm_eval \
  --model vllm-vlm \
  --model_args pretrained="RedHatAI/Qwen3-VL-32B-Instruct-FP8-block",dtype=auto,add_bos_token=False,max_model_len=262144,tensor_parallel_size=2,gpu_memory_utilization=0.9,enable_chunked_prefill=True,trust_remote_code=True,max_images=10 \
  --tasks chartqa \
  --apply_chat_template \
  --batch_size auto

MMLU

lm_eval \
  --model vllm-vlm \
  --model_args pretrained="RedHatAI/Qwen3-VL-32B-Instruct-FP8-block",dtype=auto,add_bos_token=False,max_model_len=262144,tensor_parallel_size=2,gpu_memory_utilization=0.9,enable_chunked_prefill=True,trust_remote_code=True,max_images=10 \
  --tasks mmlu \
  --apply_chat_template \
  --batch_size auto

Accuracy Comparison

ChartQA Results

Model	Accuracy	Recovery (%)
Qwen/Qwen3-VL-32B-Instruct	61.52	100.00
Qwen/Qwen3-VL-32B-Instruct-FP8	86.92	141.32
RedHatAI/Qwen3-VL-32B-Instruct-FP8-block	86.60	140.82
RedHatAI/Qwen3-VL-32B-Instruct-FP8-dynamic	86.68	140.95

MMLU Results

Model	Accuracy	Recovery (%)
Qwen/Qwen3-VL-32B-Instruct	78.03	100.00
Qwen/Qwen3-VL-32B-Instruct-FP8	77.80	99.71
RedHatAI/Qwen3-VL-32B-Instruct-FP8-block	77.72	99.60
RedHatAI/Qwen3-VL-32B-Instruct-FP8-dynamic	77.89	99.82