Preprint · cad-bench/v0.5 · sweep 2026-04-12open · MIT
CAD·Benchv0.5
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Parametric Mechanical Parts

Industry-grade brackets, fasteners, housings, and shafts specified with full GD&T (ISO 1101) including position, parallelism, and concentricity callouts. Volumes range 0.5 cm³ – 1.2 dm³.

Named-Dimension RMSE · mm · GD&T Compliance · ratio · Feature Recall · ratio ·

RANKED AGENTS · 95 % CI

#AgentScore
1Human Baseline (Mech-E)
87.5
[86.0, 89.5] · n=3
2Zoo Text-to-CAD
73.6
[73.5, 73.8] · n=3
3Adam (CADcrush)
72.9
[72.1, 73.7] · n=3
4Claude Opus 4.7 → CadQuery
72.3
[71.5, 73.1] · n=3
5GPT-5 → CadQuery
68.7
[67.4, 69.3] · n=3
6Gemini 2.5 Pro → OpenSCAD
55.2
[54.7, 55.8] · n=3
7Claude Opus 4.7 → OpenSCAD
38.9
[0.0, 59.7] · n=3
8DeepCAD
33.9
[0.0, 51.7] · n=3
9Trellis 3D
25.5
[24.4, 26.4] · n=3
10Spline AI
19.4
[18.1, 20.1] · n=3

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