A free, easy-to-use, open-source, commercial-grade toolkit that trains deep learning algorithms to learn like the human brain.
The Microsoft Cognitive Toolkit—previously known as CNTK—empowers you to harness the intelligence within massive datasets through deep learning by providing uncompromised scaling, speed and accuracy with commercial-grade quality and compatibility with the programming languages and algorithms you already use. Hear about the team that developed the Cognitive Toolkit, or read more below.
Speed & Scalability
The Microsoft Cognitive Toolkit trains and evaluates deep learning algorithms faster than other available toolkits, scaling efficiently in a range of environments—from a CPU, to GPUs, to multiple machines—while maintaining accuracy.
The Microsoft Cognitive Toolkit is built with sophisticated algorithms and production readers to work reliably with massive datasets. Skype, Cortana, Bing, Xbox, and industry-leading data scientists already use the Microsoft Cognitive Toolkit to develop commercial-grade AI.
The Microsoft Cognitive Toolkit offers the most expressive, easy-to-use architecture available. Working with the languages and networks you know, like C++ and Python, it empowers you to customize any of the built-in training algorithms, or use your own.
Highly optimized, built-in components
Components can handle multi-dimensional dense or sparse data from Python, C++ or BrainScript
FFN, CNN, RNN/LSTM, Batch normalization, Sequence-to-Sequence with attention and more
Reinforcement learning, generative adversarial networks, supervised and unsupervised learning
Ability to add new user-defined core-components on the GPU from Python
Automatic hyperparameter tuning
Built-in readers optimized for massive datasets
Efficient resource usage
Parallelism with accuracy on multiple GPUs/machines via 1-bit SGD and Block Momentum
Memory sharing and other built-in methods to fit even the largest models in GPU memory
Easily express your own networks
Full APIs for defining networks, learners, readers, training and evaluation from Python, C++ and BrainScript
Evaluate models with Python, C++, C# and BrainScript
Interoperation with NumPy
Both high-level and low-level APIs available for ease of use and flexibility
Automatic shape inference based on your data
Fully optimized symbolic RNN loops (no unrolling needed)
Training and hosting with Azure
Takes advantage of high-speed resources when used with Azure GPU and Azure networks
Host trained models easily on Azure and add real-time training if desired
To help get you started, we’ve assembled 48 different code samples, recipes and tutorials across scenarios working with a variety of datasets: images, numeric, speech and text.