Preprint · cad-bench/v0.5 · sweep 2026-04-12open · MIT
CAD·Benchv0.5
TASKS · pilot subset

28 prompts across 20 categories

Each task carries a verbatim natural-language prompt, a canonical reference STEP (sha-256 in the listing), numerical ground-truth quantities (volume, surface area, Euler χ, genus, named features), and a difficulty class 1-5. Click a task to see the held-out reference, candidate output viewers, and metric scores per agent.

Geometric Primitivesw = 0.10 · 2/24 shown

PRIM-001Hollow cylinder (60 × 40 × 100)d1/5PRIM-007Right hexagonal prism with pitch filletd2/5

Boolean Robustnessw = 0.20 · 2/18 shown

BOOL-003Coplanar-face union (knife-edge stress)d4/5BOOL-009High-genus subtraction (lattice block)d5/5

BREP Fidelityw = 0.40 · 1/14 shown

BREP-004NURBS-handle goblet (G2 swept loft)d4/5

Free-form Surfacesw = 0.30 · 1/12 shown

SURF-002Compressor blade (NACA 65-(12)10)d5/5

Parametric Mechanical Partsw = 0.25 · 3/30 shown

MECH-014L-bracket with M6 + slotted holed3/5MECH-022Stepped shaft with retaining-ring grooved4/5MECH-027Planetary-gear carrier plated5/5

Assembly & Matingw = 0.22 · 2/16 shown

ASM-005Pin-in-hole, H7/g6 sliding fitd3/5ASM-011Dovetail slide (60° flanks)d4/5

Standards Compliancew = 0.15 · 1/18 shown

STD-002ISO 4762 M8×30 socket-head cap screwd4/5

Sheet-Metal Bodiesw = 0.13 · 1/14 shown

SHEET-003U-channel bracket, 1.5 mm Al, k=0.40d3/5

Sealing-Groove Designw = 0.10 · 1/10 shown

SEAL-001AS568-214 face-seal grooved4/5

Kinematic Mechanismsw = 0.15 · 1/12 shown

KIN-002Four-bar linkage, Grashof crank-rockerd5/5

DFM · 3-Axis CNCw = 0.30 · 1/18 shown

DFMCNC-0023-ax-machinable manifold blockd4/5

DFM · Injection Mouldw = 0.30 · 1/20 shown

DFMMOLD-002Injection-mouldable enclosure halfd4/5

DFM · FDM 3D Printw = 0.20 · 1/14 shown

DFMFDM-008FDM-printable hinge (no support)d3/5

CAM Toolpath Validityw = 0.20 · 1/12 shown

CAM-0015-pocket plate, Ø3 endmill finishd3/5

Constraint Solving & Editabilityw = 0.18 · 2/18 shown

PARAM-006Editable flange (bolt circle param sweep)d3/5PARAM-013Editable bracket (length+30 %, hole→M8)d4/5

Reverse Engineeringw = 0.20 · 2/22 shown

REVENG-002Three-view ortho → bracketd4/5REVENG-009Three-view ortho → housing with coresd5/5

2-D Sketch Constraintsw = 0.10 · 1/20 shown

SKETCH-003Tangent-arc transition profiled2/5

Functional Intent · FEA-Gatedw = 0.25 · 2/16 shown

FUNC-001Cantilever bracket — 250 N tip load, 6061-T6, SF≥4d5/5FUNC-007Heat-sink fin array for 25 W TO-220d5/5

Paraphrase Robustnessw = 0.15 · 1/20 shown

PARA-0015× paraphrased L-bracketd3/5

Confidence Calibrationw = 0.12 · 1/15 shown

CAL-003Confidence-calibrated planetary carrierd5/5