Instructions to use z-lab/Qwen3.5-2B-PARO with libraries, inference providers, notebooks, and local apps. Follow these links to get started.
- Libraries
- Transformers
How to use z-lab/Qwen3.5-2B-PARO with Transformers:
# Use a pipeline as a high-level helper from transformers import pipeline pipe = pipeline("image-text-to-text", model="z-lab/Qwen3.5-2B-PARO") 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("z-lab/Qwen3.5-2B-PARO") model = AutoModelForMultimodalLM.from_pretrained("z-lab/Qwen3.5-2B-PARO", 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]:])) - MLX
How to use z-lab/Qwen3.5-2B-PARO with MLX:
# Make sure mlx-vlm is installed # pip install --upgrade mlx-vlm from mlx_vlm import load, generate from mlx_vlm.prompt_utils import apply_chat_template from mlx_vlm.utils import load_config # Load the model model, processor = load("z-lab/Qwen3.5-2B-PARO") config = load_config("z-lab/Qwen3.5-2B-PARO") # Prepare input image = ["http://images.cocodataset.org/val2017/000000039769.jpg"] prompt = "Describe this image." # Apply chat template formatted_prompt = apply_chat_template( processor, config, prompt, num_images=1 ) # Generate output output = generate(model, processor, formatted_prompt, image) print(output) - Notebooks
- Google Colab
- Kaggle
- Local Apps Settings
- LM Studio
- vLLM
How to use z-lab/Qwen3.5-2B-PARO with vLLM:
Install from pip and serve model
# Install vLLM from pip: pip install vllm # Start the vLLM server: vllm serve "z-lab/Qwen3.5-2B-PARO" # Call the server using curl (OpenAI-compatible API): curl -X POST "http://localhost:8000/v1/chat/completions" \ -H "Content-Type: application/json" \ --data '{ "model": "z-lab/Qwen3.5-2B-PARO", "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/z-lab/Qwen3.5-2B-PARO
- SGLang
How to use z-lab/Qwen3.5-2B-PARO 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 "z-lab/Qwen3.5-2B-PARO" \ --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": "z-lab/Qwen3.5-2B-PARO", "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 "z-lab/Qwen3.5-2B-PARO" \ --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": "z-lab/Qwen3.5-2B-PARO", "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" } } ] } ] }' - Pi
How to use z-lab/Qwen3.5-2B-PARO with Pi:
Start the MLX server
# Install MLX LM: uv tool install mlx-lm # Start a local OpenAI-compatible server: mlx_lm.server --model "z-lab/Qwen3.5-2B-PARO"
Configure the model in Pi
# Install Pi: npm install -g @mariozechner/pi-coding-agent # Add to ~/.pi/agent/models.json: { "providers": { "mlx-lm": { "baseUrl": "http://localhost:8080/v1", "api": "openai-completions", "apiKey": "none", "models": [ { "id": "z-lab/Qwen3.5-2B-PARO" } ] } } }Run Pi
# Start Pi in your project directory: pi
- OpenClaw new
How to use z-lab/Qwen3.5-2B-PARO with OpenClaw:
Start the MLX server
# Install MLX LM: uv tool install mlx-lm # Start a local OpenAI-compatible server: mlx_lm.server --model "z-lab/Qwen3.5-2B-PARO"
Configure OpenClaw
# Install OpenClaw: npm install -g openclaw@latest # Register the local server and set it as the default model: openclaw onboard --non-interactive --mode local \ --auth-choice custom-api-key \ --custom-base-url http://127.0.0.1:8080/v1 \ --custom-model-id "z-lab/Qwen3.5-2B-PARO" \ --custom-provider-id mlx-lm \ --custom-compatibility openai \ --custom-text-input \ --accept-risk \ --skip-health
Run OpenClaw
openclaw agent --local --agent main --message "Hello from Hugging Face"
- Docker Model Runner
How to use z-lab/Qwen3.5-2B-PARO with Docker Model Runner:
docker model run hf.co/z-lab/Qwen3.5-2B-PARO
- Hermes Agent
How to use z-lab/Qwen3.5-2B-PARO with Hermes Agent:
Start the MLX server
# Install MLX LM: uv tool install mlx-lm # Start a local OpenAI-compatible server: mlx_lm.server --model "z-lab/Qwen3.5-2B-PARO"
Configure Hermes
# Install Hermes: curl -fsSL https://hermes-agent.nousresearch.com/install.sh | bash hermes setup # Point Hermes at the local server: hermes config set model.provider custom hermes config set model.base_url http://127.0.0.1:8080/v1 hermes config set model.default z-lab/Qwen3.5-2B-PARO
Run Hermes
hermes
| library_name: transformers | |
| license: apache-2.0 | |
| pipeline_tag: image-text-to-text | |
| base_model: | |
| - Qwen/Qwen3.5-2B | |
| # z-lab/Qwen3.5-2B-PARO | |
| **Pairwise Rotation Quantization for Efficient Reasoning LLM Inference** | |
| <p> | |
| <a href="https://arxiv.org/abs/2511.10645"><img src="https://img.shields.io/badge/arXiv-2511.10645-b31b1b.svg" alt="Paper"></a> | |
| <a href="https://paroquant.z-lab.ai"><img src="https://img.shields.io/badge/Blog-ParoQuant-blue" alt="Blog"></a> | |
| <a href="https://huggingface.co/collections/z-lab/paroquant"><img src="https://img.shields.io/badge/%F0%9F%A4%97-Models-yellow" alt="Models"></a> | |
| <a href="https://pypi.org/project/paroquant/"><img src="https://img.shields.io/pypi/v/paroquant" alt="PyPI"></a> | |
| </p> | |
| ParoQuant is the state-of-the-art INT4 quantization for LLMs. It closes the accuracy gap with FP16 while running at near-AWQ speed. Supports NVIDIA GPUs (vLLM, Transformers) and Apple Silicon (MLX). | |
| z-lab/Qwen3.5-2B-PARO is a 4-bit [Qwen/Qwen3.5-2B](https://huggingface.co/Qwen/Qwen3.5-2B) quantized with ParoQuant. Check out other ParoQuant models from the Hugging Face [collection](https://huggingface.co/collections/z-lab/paroquant). | |
| ## Quick Start | |
| ### Installation | |
| ```bash | |
| # NVIDIA GPU (CUDA 12.9) | |
| pip install "paroquant[vllm]" | |
| # NVIDIA GPU (CUDA 13.0) | |
| pip install "paroquant[vllm] vllm==0.17.1" \ | |
| --extra-index-url https://wheels.vllm.ai/0.17.1/cu130 \ | |
| --extra-index-url https://download.pytorch.org/whl/cu130 | |
| # Apple Silicon | |
| pip install "paroquant[mlx]" | |
| ``` | |
| ### Interactive Chat | |
| ```bash | |
| python -m paroquant.cli.chat --model z-lab/Qwen3.5-2B-PARO | |
| ``` | |
| Add `--llm-only` if you do not wish to load the VLM components. | |
| ### OpenAI-Compatible API Server | |
| ```bash | |
| python -m paroquant.cli.serve --model z-lab/Qwen3.5-2B-PARO --port 8000 | |
| ``` | |
| Add `--llm-only` if you do not wish to load the VLM components. | |
| ### Agent with Tool Calling | |
| Start the API server first, then install the agent dependencies and run: | |
| ```bash | |
| pip install "paroquant[agent]" | |
| python -m paroquant.cli.agent --model z-lab/Qwen3.5-2B-PARO | |
| ``` | |
| Tool use (web fetch, filesystem, time) requires [Node.js](https://nodejs.org/en/download). | |
| ### Docker (NVIDIA GPU) | |
| > [!NOTE] | |
| > The following commands map the local cache directory to the container in order to persist kernel cache across runs. Remove `-v ...` to disable this behaviour. | |
| ```bash | |
| # Interactive chat | |
| docker run --pull=always --rm -it --gpus all --ipc=host \ | |
| -v $HOME/.cache/paroquant:/root/.cache/paroquant \ | |
| ghcr.io/z-lab/paroquant:chat --model z-lab/Qwen3.5-2B-PARO | |
| # API server (port 8000) | |
| docker run --pull=always --rm -it --gpus all --ipc=host -p 8000:8000 \ | |
| -v $HOME/.cache/paroquant:/root/.cache/paroquant \ | |
| ghcr.io/z-lab/paroquant:serve --model z-lab/Qwen3.5-2B-PARO | |
| ``` | |
| ## Citation | |
| ```bibtex | |
| @inproceedings{liang2026paroquant, | |
| title = {{ParoQuant: Pairwise Rotation Quantization for Efficient Reasoning LLM Inference}}, | |
| author = {Liang, Yesheng and Chen, Haisheng and Zhang, Zihan and Han, Song and Liu, Zhijian}, | |
| booktitle = {International Conference on Learning Representations (ICLR)}, | |
| year = {2026} | |
| } | |
| ``` |