Open Source Deep Learning Project: CNTK

CNTK: Computational Network Toolkit

Project Website:

Github Link:


Production-quality, Open Source, Multi-machine, Multi-GPU,
Highly efficent RNN training,
Speech, Image, Text

CNTK (, the Computational Network Toolkit by Microsoft Research, is a unified deep-learning toolkit that describes neural networks as a series of computational steps via a directed graph. In this directed graph, leaf nodes represent input values or network parameters, while other nodes represent matrix operations upon their inputs. CNTK allows to easily realize and combine popular model types such as feed-forward DNNs, convolutional nets (CNNs), and recurrent networks (RNNs/LSTMs). It implements stochastic gradient descent (SGD, error backpropagation) learning with automatic differentiation and parallelization across multiple GPUs and servers. CNTK has been available under an open-source license since April 2015. It is our hope that the community will take advantage of CNTK to share ideas more quickly through the exchange of open source working code.

Wiki: Go to the CNTK Wiki for all information on CNTK including setup, examples, etc.

License: See in the root of this repository for the full license information.

Tutorial: Microsoft Computational Network Toolkit (CNTK) @ NIPS 2015 Workshops


Microsoft Computational Network Toolkit offers most efficient distributed deep learning computational performance
Microsoft researchers win ImageNet computer vision challenge (December 2015)

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