Installation

Steel is part of Newton; there is no separate package. Until the features in the table above are in a Newton release, install Newton from the integration branch:

pip install "newton[examples] @ git+https://github.com/skild-ai/newton.git@main"

Why the branch: it carries Steel fixes and features days to weeks before they are reviewed into Newton and released, and it is the build these docs describe. Pin a commit rather than main for reproducible results:

pip install "newton[examples] @ git+https://github.com/skild-ai/newton.git@baffc2abb2"

To use only released features, install Newton 1.8.0 from PyPI with pip install "newton[examples]==1.8.0". Newton requires Python 3.10 or newer and warp-lang 1.17 or newer; an NVIDIA GPU with CUDA is needed for the fast paths and graph capture. The examples extra installs what the bundled examples and viewers need; the solver itself needs only Warp.

From a clone, for development:

git clone https://github.com/skild-ai/newton.git
cd newton
pip install -e ".[examples]"
python -m newton.examples steel_sleeping