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A Neural Net Training Interface on TensorFlow, with focus on speed + flexibility

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Tensorpack is a neural network training interface based on TensorFlow.

ReadTheDoc Gitter chat model-zoo


It's Yet Another TF high-level API, with speed, and flexibility built together.

  1. Focus on training speed.
    • Speed comes for free with Tensorpack -- it uses TensorFlow in the efficient way with no extra overhead. On common CNNs, it runs training 1.2~5x faster than the equivalent Keras code. Your training can probably gets faster if written with Tensorpack.
+ Data-parallel multi-GPU/distributed training strategy is off-the-shelf to use.
It scales as well as Google's [official benchmark](

  1. Focus on large datasets.

    • You don't usually need
      . Symbolic programming often makes data processing harder. Tensorpack helps you efficiently process large datasets (e.g. ImageNet) in pure Python with autoparallelization.
  2. It's not a model wrapper.

    • There are too many symbolic function wrappers in the world. Tensorpack includes only a few common models. But you can use any symbolic function library inside Tensorpack, including tf.layers/Keras/slim/tflearn/tensorlayer/....

See tutorials and documentations to know more about these features.


We refuse toy examples. Instead of showing tiny CNNs trained on MNIST/Cifar10, we provide training scripts that reproduce well-known papers.

We refuse low-quality implementations. Unlike most open source repos which only implement papers, Tensorpack examples faithfully reproduce papers, demonstrating its flexibility for actual research.


Reinforcement Learning:

Speech / NLP:



  • Python 3.3+.
  • Python bindings for OpenCV. (Optional, but required by a lot of features)
  • TensorFlow ≥ 1.5, < 2
    • TF is not not required if you only want to use
      alone as a data processing library
    • TF2 is supported if used in graph mode (and use
      when needed)
      pip install --upgrade git+
      # or add `--user` to install to user's local directories

Please note that tensorpack is not yet stable. If you use tensorpack in your code, remember to mark the exact version of tensorpack you use as your dependencies.

Citing Tensorpack:

If you use Tensorpack in your research or wish to refer to the examples, please cite with:

  author={Wu, Yuxin and others},

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