Instructions to use FastFlowLM/Qwen3.5-4B-NPU2 with libraries, inference providers, notebooks, and local apps. Follow these links to get started.

Libraries

How to use FastFlowLM/Qwen3.5-4B-NPU2 with Transformers:

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

pipe = pipeline("image-text-to-text", model="FastFlowLM/Qwen3.5-4B-NPU2")
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 AutoModel
model = AutoModel.from_pretrained("FastFlowLM/Qwen3.5-4B-NPU2", dtype="auto")

Notebooks
Google Colab
Kaggle
Local Apps

vLLM

How to use FastFlowLM/Qwen3.5-4B-NPU2 with vLLM:

Install from pip and serve model

# Install vLLM from pip:
pip install vllm
# Start the vLLM server:
vllm serve "FastFlowLM/Qwen3.5-4B-NPU2"
# Call the server using curl (OpenAI-compatible API):
curl -X POST "http://localhost:8000/v1/chat/completions" \
	-H "Content-Type: application/json" \
	--data '{
		"model": "FastFlowLM/Qwen3.5-4B-NPU2",
		"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/FastFlowLM/Qwen3.5-4B-NPU2

SGLang

How to use FastFlowLM/Qwen3.5-4B-NPU2 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 "FastFlowLM/Qwen3.5-4B-NPU2" \
    --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": "FastFlowLM/Qwen3.5-4B-NPU2",
		"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 "FastFlowLM/Qwen3.5-4B-NPU2" \
        --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": "FastFlowLM/Qwen3.5-4B-NPU2",
		"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 FastFlowLM/Qwen3.5-4B-NPU2 with Docker Model Runner:
```
docker model run hf.co/FastFlowLM/Qwen3.5-4B-NPU2
```

Update config.json

by Shouyu-joel - opened Mar 16

base: refs/heads/main

←

from: refs/pr/2

Discussion Files changed

+27

-5

Files changed (1) hide show

config.json +27 -5

config.json CHANGED Viewed

@@ -75,8 +75,30 @@
     },
     "addr_qk": 53248,
     "addr_kv": 53536,
-  "flm_version": "0.9.25",
-  "vision_model_weight": "vision_weight.q4nx",
-  "vision_mm_engine_xclbin_name": "vision_mm.xclbin",
-  "vision_mha_engine_xclbin_name":"vision_attn.xclbin"
-}

     },
     "addr_qk": 53248,
     "addr_kv": 53536,
+    "flm_version": "0.9.25",
+    "vision_model_weight": "vision_weight.q4nx",
+    "vision_config": {
+        "vision_mm_engine_xclbin_name": "vision_mm.xclbin",
+        "vision_mha_engine_xclbin_name": "vision_attn.xclbin",
+        "QWEN3_5_PATCH_SIZE": 16,
+        "QWEN3_5_IMAGE_MERGE_SIZE": 2,
+        "QWEN3_5_SPATIAL_MERGE_SIZE": 2,
+        "QWEN3_5_SHORTEST_EDGE": 65536,
+        "QWEN3_5_LONGEST_EDGE": 16777216,
+        "QWEN3_5_VISION_RESCALE_FACTOR": 0.00392156862745098,
+        "QWEN3_5_VISION_RESCALE_IMAGE_MEAN": 0.5,
+        "QWEN3_5_VISION_RESCALE_IMAGE_STD": 0.5,
+        "QWEN3_5_TEMPORAL_PATCH_SIZE": 2,
+        "QWEN3_5_VISION_EMBED_DIM": 1024,
+        "QWEN3_5_VISION_NUM_HEADS": 16,
+        "QWEN3_5_VISION_HEAD_DIM": 64,
+        "QWEN3_5_VISION_MLP_INTERMEDIATE_SIZE": 4096,
+        "QWEN3_5_VISION_NUM_POSITION_EMBEDDINGS": 2304,
+        "QWEN3_5_VISION_NUM_LAYERS": 24,
+        "QWEN3_5_VISION_LAYER_NORM_EPSILON": 1e-06,
+        "QWEN3_5_VISION_OUT_HIDDEN_SIZE": 2560,
+        "VISION_MM_TILE_M": 128,
+        "VISION_MM_TILE_K": 512,
+        "VISION_MM_TILE_N": 64
+    }
+}