VayuAI CAD · built by engineers, for engineers
Describe a part. Get real CAD.
Plain English in, manufacturable geometry out - parametric build123d solids, a true ASME Y14.5 drawing, and STEP / STL / GLB files. Generated by the best of three models and verified against your spec, so you can open it straight in SolidWorks.
Automation with consciousness · AI with purpose
Writes like an engineer reads: give overall dimensions in mm, hole diameters with counts and positions, and named features (fillets, chamfers, bores, bolt circles). The more numeric your description, the stronger the verification.
Describe
Plain English with real dimensions. Your text is parsed into a checkable spec.
Three models draft
Three free LLMs each write a parametric build123d program, concurrently.
Build + verify
Each program runs on the OpenCascade kernel; measured geometry is checked against your spec and repaired. Best candidate wins.
Engineering files
STEP for SolidWorks, an ASME Y14.5 drawing (DXF + PNG), STL, and the editable program itself.
Start from a reference part
0 curated · instant loadWhat it does well
Standard prismatic and turned mechanical geometry: plates, brackets, flanges, shafts, gears, enclosures, bolt circles, counterbores - and small assemblies (up to 24 components) with joint-based placement, exact pairwise interference checks, exploded views, and an ASME-style parts list. Every model is a live parametric program - edit any named dimension, save configurations, and export STEP that opens cleanly in mainstream MCAD.
What it is not
Not organic surfacing, large assemblies (hundreds of components), kinematic simulation, or release-for-manufacturing authority. Assembly placement is joint-driven and deterministic, not a full mate solver. It is a working engineering prototype on free-tier models and hardware: generation takes a minute or two, and outputs deserve the same review you would give any junior engineer's first pass.