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    Copyright © 2026 NVIDIA Corporation

    NVIDIA

    cosmos3-nano-reasoner

    DownloadableFree Endpoint

    Vision language model that excels in understanding the physical world using structured reasoning on videos or images.

    • Physical AI
    • autonomous vehicles
    • industrial
    • reasoning
    • robotics
    • smart cities
    • Synthetic Data Generation
    • video understanding
    • vision language model
    Download Now
    Deploying your application in production? Get started with a 90-day evaluation of NVIDIA AI Enterprise

    Follow the steps below to download and run the NVIDIA NIM inference microservice for this model on your infrastructure of choice.

    Step 1
    Generate API Key

    Step 2
    Pull and Run the NIM

    $ docker login nvcr.io
    Username: $oauthtoken
    Password: <PASTE_API_KEY_HERE>
    

    Pull and run the NVIDIA NIM with the command below. This will download the optimized model for your infrastructure.

    export NGC_API_KEY=<PASTE_API_KEY_HERE>
    export LOCAL_NIM_CACHE=~/.cache/nim
    mkdir -p "$LOCAL_NIM_CACHE"
    chmod -R a+w "$LOCAL_NIM_CACHE"
    docker run -it --rm \
        --gpus all \
        --ipc host \
        --shm-size=32GB \
        -e NGC_API_KEY \
        -v "$LOCAL_NIM_CACHE:/opt/nim/.cache" \
        -u $(id -u) \
        -p 8000:8000 \
        nvcr.io/nim/nvidia/cosmos3-reasoner:latest
    

    Step 3
    Test the NIM

    You can now make a local API call using this curl command:

    curl -X 'POST' \
    'http://127.0.0.1:8000/v1/chat/completions' \
        -H 'Accept: application/json' \
        -H 'Content-Type: application/json' \
        -d '{
            "model": "nvidia/cosmos3-nano-reasoner",
            "messages": [
                {
                    "role": "system",
                    "content": "You are a helpful assistant."
                },
                {
                    "role": "user",
                    "content": [
                        {
                            "type": "image_url",
                            "image_url":
                                {
                                    "url": "https://assets.ngc.nvidia.com/products/api-catalog/phi-3-5-vision/example1b.jpg"
                                }
                        },
                        {
                            "type": "text",
                            "text": "What is in this image?"
                        }
                    ]
                }
            ],
            "max_tokens": 256,
            "stream": false
        }'
    

    For more details on getting started with this NIM, visit the NVIDIA NIM Docs.