Instructions to use vastai-ais/Qwen3.5-4B-AutoRound-GPTQ-Int4 with libraries, inference providers, notebooks, and local apps. Follow these links to get started.

Libraries

How to use vastai-ais/Qwen3.5-4B-AutoRound-GPTQ-Int4 with Transformers:

# Use a pipeline as a high-level helper
from transformers import pipeline

pipe = pipeline("image-text-to-text", model="vastai-ais/Qwen3.5-4B-AutoRound-GPTQ-Int4")
messages = [
    {
        "role": "user",
        "content": [
            {"type": "image", "url": "https://huggingface.co/datasets/huggingface/documentation-images/resolve/main/p-blog/candy.JPG"},
            {"type": "text", "text": "What animal is on the candy?"}
        ]
    },
]
pipe(text=messages)

# Load model directly
from transformers import AutoProcessor, AutoModelForMultimodalLM

processor = AutoProcessor.from_pretrained("vastai-ais/Qwen3.5-4B-AutoRound-GPTQ-Int4")
model = AutoModelForMultimodalLM.from_pretrained("vastai-ais/Qwen3.5-4B-AutoRound-GPTQ-Int4", device_map="auto")
messages = [
    {
        "role": "user",
        "content": [
            {"type": "image", "url": "https://huggingface.co/datasets/huggingface/documentation-images/resolve/main/p-blog/candy.JPG"},
            {"type": "text", "text": "What animal is on the candy?"}
        ]
    },
]
inputs = processor.apply_chat_template(
	messages,
	add_generation_prompt=True,
	tokenize=True,
	return_dict=True,
	return_tensors="pt",
).to(model.device)

outputs = model.generate(**inputs, max_new_tokens=40)
print(processor.decode(outputs[0][inputs["input_ids"].shape[-1]:]))

Notebooks
Google Colab
Kaggle
Local Apps Settings

vLLM

How to use vastai-ais/Qwen3.5-4B-AutoRound-GPTQ-Int4 with vLLM:

Install from pip and serve model

# Install vLLM from pip:
pip install vllm
# Start the vLLM server:
vllm serve "vastai-ais/Qwen3.5-4B-AutoRound-GPTQ-Int4"
# Call the server using curl (OpenAI-compatible API):
curl -X POST "http://localhost:8000/v1/chat/completions" \
	-H "Content-Type: application/json" \
	--data '{
		"model": "vastai-ais/Qwen3.5-4B-AutoRound-GPTQ-Int4",
		"messages": [
			{
				"role": "user",
				"content": [
					{
						"type": "text",
						"text": "Describe this image in one sentence."
					},
					{
						"type": "image_url",
						"image_url": {
							"url": "https://cdn.britannica.com/61/93061-050-99147DCE/Statue-of-Liberty-Island-New-York-Bay.jpg"
						}
					}
				]
			}
		]
	}'

Use Docker

docker model run hf.co/vastai-ais/Qwen3.5-4B-AutoRound-GPTQ-Int4

SGLang

How to use vastai-ais/Qwen3.5-4B-AutoRound-GPTQ-Int4 with SGLang:

Install from pip and serve model

# Install SGLang from pip:
pip install sglang
# Start the SGLang server:
python3 -m sglang.launch_server \
    --model-path "vastai-ais/Qwen3.5-4B-AutoRound-GPTQ-Int4" \
    --host 0.0.0.0 \
    --port 30000
# Call the server using curl (OpenAI-compatible API):
curl -X POST "http://localhost:30000/v1/chat/completions" \
	-H "Content-Type: application/json" \
	--data '{
		"model": "vastai-ais/Qwen3.5-4B-AutoRound-GPTQ-Int4",
		"messages": [
			{
				"role": "user",
				"content": [
					{
						"type": "text",
						"text": "Describe this image in one sentence."
					},
					{
						"type": "image_url",
						"image_url": {
							"url": "https://cdn.britannica.com/61/93061-050-99147DCE/Statue-of-Liberty-Island-New-York-Bay.jpg"
						}
					}
				]
			}
		]
	}'

Use Docker images

docker run --gpus all \
    --shm-size 32g \
    -p 30000:30000 \
    -v ~/.cache/huggingface:/root/.cache/huggingface \
    --env "HF_TOKEN=<secret>" \
    --ipc=host \
    lmsysorg/sglang:latest \
    python3 -m sglang.launch_server \
        --model-path "vastai-ais/Qwen3.5-4B-AutoRound-GPTQ-Int4" \
        --host 0.0.0.0 \
        --port 30000
# Call the server using curl (OpenAI-compatible API):
curl -X POST "http://localhost:30000/v1/chat/completions" \
	-H "Content-Type: application/json" \
	--data '{
		"model": "vastai-ais/Qwen3.5-4B-AutoRound-GPTQ-Int4",
		"messages": [
			{
				"role": "user",
				"content": [
					{
						"type": "text",
						"text": "Describe this image in one sentence."
					},
					{
						"type": "image_url",
						"image_url": {
							"url": "https://cdn.britannica.com/61/93061-050-99147DCE/Statue-of-Liberty-Island-New-York-Bay.jpg"
						}
					}
				]
			}
		]
	}'

Docker Model Runner
How to use vastai-ais/Qwen3.5-4B-AutoRound-GPTQ-Int4 with Docker Model Runner:
```
docker model run hf.co/vastai-ais/Qwen3.5-4B-AutoRound-GPTQ-Int4
```

Qwen3.5-4B-AutoRound-GPTQ-Int4

Model Details

This model is an int4 model with group_size 128 and symmetric quantization of Qwen/Qwen3.5-4B generated by vastai modelzoo. Please follow the license of the original model.

vllm Inference

vllm == v0.17.0

vllm serve vastai-ais/Qwen3.5-4B-AutoRound-GPTQ-Int4 --port 8000 --tensor-parallel-size 1 --max-model-len 65536 --reasoning-parser qwen3

curl http://localhost:8000/v1/chat/completions -H "Content-Type: application/json" -d ' {
    "model": "vastai-ais/Qwen3.5-4B-AutoRound-GPTQ-Int4",
    "messages": [
      {"role": "system", "content": "You are a helpful assistant."},
      {"role": "user", "content": "Who are you?"}
    ],
    "max_tokens": 512
  } '

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Safetensors

Model size

5B params

Tensor type

I32

BF16

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