Microsoft Cognitive Toolkit Release 18.08

Microsoft Cognitive Toolkit Release 18.08 (PDF)

The NVIDIA container image of Microsoft Cognitive Toolkit, release 18.08, is available.

Contents of the Microsoft Cognitive Toolkit

This container image contains the source files that are used to build the Microsoft Cognitive Toolkit in the /opt/cntk directory. The Microsoft Cognitive Toolkit binaries are pre-built and installed into the /usr/local/cntk directory.

A Python 3.6 Conda environment (including the Microsoft Cognitive Toolkit module) is installed in the /opt/conda/envs/cntk-py36 directory. This is included in PATH, so by default the python command executes a Python 3.6 interpreter. To use the base Ubuntu Python 2.7 binary, you can either adjust PATH or explicitly call /usr/bin/python. This image of the Microsoft Cognitive Toolkit 2.5, is built with the following options enabled:

  • Async SGD
  • Python 3 API
  • OpenCV
  • Kaldi

The container also includes the following:

Driver Requirements

Release 18.08 is based on CUDA 9, which requires NVIDIA Driver release 384.xx.

Key Features and Enhancements

This Microsoft Cognitive Toolkit release includes the following key features and enhancements.


We are continuing to incorporate monthly Microsoft Cognitive Toolkit upstream changes as well as upgrade NVIDIA libraries, such as cuDNN, cuBLAS, NCCL, and the Ubuntu OS. However, we will be discontinuing container updates once the next major CUDA version is released.

Known Issues

There are no known issues in this release.

© Copyright 2023, NVIDIA. Last updated on Jan 27, 2020.