You can get the most stable version from pip:
pip install collagen
The fresh-most release of the framework can also be installed from the master branch.
Collagen supports distributed training with mixed precision out-of-the box. Consider using APEX to use this feature:
git clone https://github.com/NVIDIA/apex
cd apex
pip install -v --no-cache-dir --global-option="--cpp_ext" --global-option="--cuda_ext"