How to use from
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 "apolo13x/Qwen3.5-35B-A3B-NVFP4" \
    --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": "apolo13x/Qwen3.5-35B-A3B-NVFP4",
		"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 "apolo13x/Qwen3.5-35B-A3B-NVFP4" \
        --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": "apolo13x/Qwen3.5-35B-A3B-NVFP4",
		"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"
						}
					}
				]
			}
		]
	}'
Quick Links

Qwen3.5-35B-A3B-NVFP4

This is a quantized version of Qwen/Qwen3.5-35B-A3B. This model accepts text and images as inputs and generates text as outputs. The weights and activations were quantized to FP4 using llm-compressor, reducing the model size from 67.0 GB to 21.8 GB (~3.1x reduction) while maintaining 98.8% average accuracy recovery.


Inference

As of 2/27/2026, this model is supported in vLLM nightly. To serve the model:

vllm serve Kbenkhaled/Qwen3.5-35B-A3B-NVFP4 \
    --reasoning-parser qwen3 \
    --enable-prefix-caching

Evaluation

Evaluated with lm-evaluation-harness, 0-shot, thinking mode ON.

Benchmark Qwen3.5-35B-A3B Qwen3.5-35B-A3B-NVFP4 (this model) Recovery
GPQA Diamond 81.31% 80.81% 99.4%
IFEval 95.56% 92.93% 97.2%
MMLU-Redux 92.51% 92.31% 99.8%
Average 89.79% 88.68% 98.8%
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