base on MLX-VLM is a package for inference and fine-tuning of Vision Language Models (VLMs) on your Mac using MLX. [](https://github.com/Blaizzy/mlx-vlm/actions/workflows/python-publish.yml) # MLX-VLM MLX-VLM is a package for inference and fine-tuning of Vision Language Models (VLMs) and Omni Models (VLMs with audio and video support) on your Mac using MLX. ## Table of Contents - [Installation](#installation) - [Usage](#usage) - [Command Line Interface (CLI)](#command-line-interface-cli) - [Chat UI with Gradio](#chat-ui-with-gradio) - [Python Script](#python-script) - [Multi-Image Chat Support](#multi-image-chat-support) - [Supported Models](#supported-models) - [Usage Examples](#usage-examples) - [Fine-tuning](#fine-tuning) ## Installation The easiest way to get started is to install the `mlx-vlm` package using pip: ```sh pip install -U mlx-vlm ``` ## Usage ### Command Line Interface (CLI) Generate output from a model using the CLI: ```sh # Image generation mlx_vlm.generate --model mlx-community/Qwen2-VL-2B-Instruct-4bit --max-tokens 100 --temperature 0.0 --image http://images.cocodataset.org/val2017/000000039769.jpg # Audio generation (New) mlx_vlm.generate --model mlx-community/gemma-3n-E2B-it-4bit --max-tokens 100 --prompt "Describe what you hear" --audio /path/to/audio.wav # Multi-modal generation (Image + Audio) mlx_vlm.generate --model mlx-community/gemma-3n-E2B-it-4bit --max-tokens 100 --prompt "Describe what you see and hear" --image /path/to/image.jpg --audio /path/to/audio.wav ``` ### Chat UI with Gradio Launch a chat interface using Gradio: ```sh mlx_vlm.chat_ui --model mlx-community/Qwen2-VL-2B-Instruct-4bit ``` ### Python Script Here's an example of how to use MLX-VLM in a Python script: ```python import mlx.core as mx 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_path = "mlx-community/Qwen2-VL-2B-Instruct-4bit" model, processor = load(model_path) config = load_config(model_path) # Prepare input image = ["http://images.cocodataset.org/val2017/000000039769.jpg"] # image = [Image.open("...")] can also be used with PIL.Image.Image objects prompt = "Describe this image." # Apply chat template formatted_prompt = apply_chat_template( processor, config, prompt, num_images=len(image) ) # Generate output output = generate(model, processor, formatted_prompt, image, verbose=False) print(output) ``` #### Audio Example ```python from mlx_vlm import load, generate from mlx_vlm.prompt_utils import apply_chat_template from mlx_vlm.utils import load_config # Load model with audio support model_path = "mlx-community/gemma-3n-E2B-it-4bit" model, processor = load(model_path) config = model.config # Prepare audio input audio = ["/path/to/audio1.wav", "/path/to/audio2.mp3"] prompt = "Describe what you hear in these audio files." # Apply chat template with audio formatted_prompt = apply_chat_template( processor, config, prompt, num_audios=len(audio) ) # Generate output with audio output = generate(model, processor, formatted_prompt, audio=audio, verbose=False) print(output) ``` #### Multi-Modal Example (Image + Audio) ```python from mlx_vlm import load, generate from mlx_vlm.prompt_utils import apply_chat_template from mlx_vlm.utils import load_config # Load multi-modal model model_path = "mlx-community/gemma-3n-E2B-it-4bit" model, processor = load(model_path) config = model.config # Prepare inputs image = ["/path/to/image.jpg"] audio = ["/path/to/audio.wav"] prompt = "" # Apply chat template formatted_prompt = apply_chat_template( processor, config, prompt, num_images=len(image), num_audios=len(audio) ) # Generate output output = generate(model, processor, formatted_prompt, image, audio=audio, verbose=False) print(output) ``` ### Server (FastAPI) Start the server: ```sh mlx_vlm.server ``` The server provides multiple endpoints for different use cases and supports dynamic model loading/unloading with caching (one model at a time). #### Available Endpoints - `/generate` - Main generation endpoint with support for images, audio, and text - `/chat` - Chat-style interaction endpoint - `/responses` - OpenAI-compatible endpoint - `/health` - Check server status - `/unload` - Unload current model from memory #### Usage Examples ##### Basic Image Generation ```sh curl -X POST "http://localhost:8000/generate" \ -H "Content-Type: application/json" \ -d '{ "model": "mlx-community/Qwen2.5-VL-32B-Instruct-8bit", "image": ["/path/to/repo/examples/images/renewables_california.png"], "prompt": "This is today'\''s chart for energy demand in California. Can you provide an analysis of the chart and comment on the implications for renewable energy in California?", "system": "You are a helpful assistant.", "stream": true, "max_tokens": 1000 }' ``` ##### Audio Support (New) ```sh curl -X POST "http://localhost:8000/generate" \ -H "Content-Type: application/json" \ -d '{ "model": "mlx-community/gemma-3n-E2B-it-4bit", "audio": ["/path/to/audio1.wav", "https://example.com/audio2.mp3"], "prompt": "Describe what you hear in these audio files", "stream": true, "max_tokens": 500 }' ``` ##### Multi-Modal (Image + Audio) ```sh curl -X POST "http://localhost:8000/generate" \ -H "Content-Type: application/json" \ -d '{ "model": "mlx-community/gemma-3n-E2B-it-4bit", "image": ["/path/to/image.jpg"], "audio": ["/path/to/audio.wav"], "prompt": "", "max_tokens": 1000 }' ``` ##### Chat Endpoint ```sh curl -X POST "http://localhost:8000/chat" \ -H "Content-Type: application/json" \ -d '{ "model": "mlx-community/Qwen2-VL-2B-Instruct-4bit", "messages": [ { "role": "user", "content": "What is in this image?", "images": ["/path/to/image.jpg"] } ], "max_tokens": 100 }' ``` ##### OpenAI-Compatible Endpoint ```sh curl -X POST "http://localhost:8000/responses" \ -H "Content-Type: application/json" \ -d '{ "model": "mlx-community/Qwen2-VL-2B-Instruct-4bit", "messages": [ { "role": "user", "content": [ {"type": "input_text", "text": "What is in this image?"}, {"type": "input_image", "image": "/path/to/image.jpg"} ] } ], "max_tokens": 100 }' ``` #### Request Parameters - `model`: Model identifier (required) - `prompt`: Text prompt for generation - `image`: List of image URLs or local paths (optional) - `audio`: List of audio URLs or local paths (optional, new) - `system`: System prompt (optional) - `messages`: Chat messages for chat/OpenAI endpoints - `max_tokens`: Maximum tokens to generate - `temperature`: Sampling temperature - `top_p`: Top-p sampling parameter - `stream`: Enable streaming responses ## Multi-Image Chat Support MLX-VLM supports analyzing multiple images simultaneously with select models. This feature enables more complex visual reasoning tasks and comprehensive analysis across multiple images in a single conversation. ### Usage Examples #### Python Script ```python from mlx_vlm import load, generate from mlx_vlm.prompt_utils import apply_chat_template from mlx_vlm.utils import load_config model_path = "mlx-community/Qwen2-VL-2B-Instruct-4bit" model, processor = load(model_path) config = model.config images = ["path/to/image1.jpg", "path/to/image2.jpg"] prompt = "Compare these two images." formatted_prompt = apply_chat_template( processor, config, prompt, num_images=len(images) ) output = generate(model, processor, formatted_prompt, images, verbose=False) print(output) ``` #### Command Line ```sh mlx_vlm.generate --model mlx-community/Qwen2-VL-2B-Instruct-4bit --max-tokens 100 --prompt "Compare these images" --image path/to/image1.jpg path/to/image2.jpg ``` ## Video Understanding MLX-VLM also supports video analysis such as captioning, summarization, and more, with select models. ### Supported Models The following models support video chat: 1. Qwen2-VL 2. Qwen2.5-VL 3. Idefics3 4. LLaVA With more coming soon. ### Usage Examples #### Command Line ```sh mlx_vlm.video_generate --model mlx-community/Qwen2-VL-2B-Instruct-4bit --max-tokens 100 --prompt "Describe this video" --video path/to/video.mp4 --max-pixels 224 224 --fps 1.0 ``` These examples demonstrate how to use multiple images with MLX-VLM for more complex visual reasoning tasks. # Fine-tuning MLX-VLM supports fine-tuning models with LoRA and QLoRA. ## LoRA & QLoRA To learn more about LoRA, please refer to the [LoRA.md](./mlx_vlm/LORA.MD) file. 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