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    microsoft/onnxruntime

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    ONNX Runtime: cross-platform, high performance ML inferencing and training accelerator

    deep-learning
    machine-learning
    ai-framework
    hardware-acceleration
    neural-networks
    onnx
    pytorch
    scikit-learn
    tensorflow
    C++
    MIT
    20.4K stars
    3.9K forks
    20.4K watching
    Updated 5/4/2026
    View on GitHub

    Scale data-heavy AI workloads

    while keeping costs low with S3-compatible storage.

    BackblazeLearn more

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    Health Score

    65

    Activity
    100
    Community
    75
    Maintenance
    39
    Last release6d ago

    Weekly Growth

    +0

    +0.0% this week

    Contributors

    392

    Total contributors

    Open Issues

    1.4K

    Use Cases & Benefits

    About onnxruntime

    ONNX Runtime is a cross-platform inference and training machine-learning accelerator.

    ONNX Runtime inference can enable faster customer experiences and lower costs, supporting models from deep learning frameworks such as PyTorch and TensorFlow/Keras as well as classical machine learning libraries such as scikit-learn, LightGBM, XGBoost, etc. ONNX Runtime is compatible with different hardware, drivers, and operating systems, and provides optimal performance by leveraging hardware accelerators where applicable alongside graph optimizations and transforms. Learn more →

    ONNX Runtime training can accelerate the model training time on multi-node NVIDIA GPUs for transformer models with a one-line addition for existing PyTorch training scripts. Learn more →

    Get Started & Resources

    Releases

    The current release and past releases can be found here: https://github.com/microsoft/onnxruntime/releases.

    For details on the upcoming release, including release dates, announcements, features, and guidance on submitting feature requests, please visit the release roadmap: https://onnxruntime.ai/roadmap.

    Data/Telemetry

    Windows distributions of this project may collect usage data and send it to Microsoft to help improve our products and services. See the privacy statement for more details.

    Contributions and Feedback

    We welcome contributions! Please see the contribution guidelines.

    For feature requests or bug reports, please file a GitHub Issue.

    For general discussion or questions, please use GitHub Discussions.

    Code of Conduct

    This project has adopted the Microsoft Open Source Code of Conduct. For more information see the Code of Conduct FAQ or contact [email protected] with any additional questions or comments.

    License

    This project is licensed under the MIT License.

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