Libraries

build123d 0.11.0 — parametric CAD in plain Python

via PyPI — pypi.org/project/build123d · Jun 2026

A code-first CAD framework on the OpenCASCADE kernel, with a clean Pythonic API for precise, manufacturable models.

build123d describes solid geometry as ordinary Python — context managers and operators rather than a chained fluent API — so parametric models are easy to read, diff, and script. It builds on the OpenCASCADE B-rep kernel and grew out of CadQuery. Version 0.11.0 is the current release.

Read the source