ASM-011 · Assembly & Mating · difficulty 4/5

Dovetail slide (60° flanks)

sha256:773bb55ecd0c1a2e…

§1Prompt verbatim

Male dovetail per ANSI B5.50: 30 mm tall, 50 mm wide at the base, 60° flank angle, 100 mm long. Held-out female slot is 0.04 mm wider on each flank for free running. Assembled clearance must be 0.04 ± 0.01 mm normal to each flank.

§2Ground-truth spec

shells1

watertighttrue

manifoldtrue

acceptance ε±0.01 mm

clearance[0.03, 0.05] mm

§3Reference render

canonical reference · drag to orbit, scroll to zoom

Visualisation is rebuilt in-browser from the canonical parametric description. Scoring is performed against the held-out reference STEP file (sha-256 fingerprint above).

§4Per-agent renders

reference + 10 agent outputs · scored against the held-out STEP

vol IoU · BREP · manifold

canonical reference

REFERENCE

canonical · ground truth

1.000100✓

Human Baseline (Mech-E)

Claude Opus 4.7 → CadQuery

Anthropic + CadQuery 2.4

0.58613✗

Gemini 2.5 Flash → CadQuery

Google + CadQuery 2.4

0.55910✗

GPT-5 → CadQuery

OpenAI + CadQuery 2.4

0.5229✗

Claude Sonnet 4.6 → CadQuery

Anthropic + CadQuery 2.4

0.52013✗

OpenAI o4 (reasoning) → CadQuery

OpenAI + CadQuery 2.4

0.50411✗

Qwen3 Coder → CadQuery

Alibaba + CadQuery 2.4

0.50013✗

CAD-Coder R1

CAD-Coder Labs (research)

0.48715✗

Claude Opus 4.7 → OpenSCAD

Anthropic + OpenSCAD 2024.06

0.4530✗

DeepSeek R1 (reasoning) → CadQuery

DeepSeek + CadQuery 2.4

0.43612✗

Gemini 2.5 Pro → OpenSCAD

Google + OpenSCAD 2024.06

0.3760✗

DeepCAD

Wu et al. 2021 (research)

0.36418✗

GPT-5 Mini → OpenSCAD

OpenAI + OpenSCAD 2024.06

0.35017✗

Llama 3.3 70B → OpenSCAD

Meta + OpenSCAD 2024.06

no manifold solid produced

Adam (CADcrush)

CADcrush

—79✗

no manifold solid produced

no manifold solid produced

Claude Haiku 4.5 → CadQuery

Anthropic + CadQuery 2.4

—50✗

Each tile is rebuilt from the canonical parametric description and degraded to match the agent's scored profile (tessellation, non-manifold face removal, dimension scale jitter, missing features). Image-only diffusion models render visually plausible meshes but score in the single digits on BREP fidelity — the geometry is not a manifold solid even when the render reads clean.

§5Per-agent metrics

ranked by Vol IoU · same data as the leaderboard, restricted to this task

Agent	Watert.	Manif.	FeatRec	Mating Clearance	Fit-Class Compliance	p50	latency	cost
Human Baseline (Mech-E)	✓	0.957	0.817	0.856	0.854	—	843.5s	$7.102
Zoo Text-to-CAD	✓	0.948	0.790	0.720	0.566	—	6.2s	$0.208
Claude Opus 4.7 → CadQuery	✓	0.932	0.784	0.581	0.438	—	30.6s	$0.324
Gemini 2.5 Flash → CadQuery	✓	0.931	0.591	0.454	0.261	—	9.3s	$0.023
GPT-5 → CadQuery	✓	0.929	0.638	0.573	0.382	—	36.3s	$0.204
Claude Sonnet 4.6 → CadQuery	✓	0.924	0.665	0.559	0.394	—	15.7s	$0.064
OpenAI o4 (reasoning) → CadQuery	✓	0.931	0.741	0.676	0.475	—	139.0s	$0.927
Qwen3 Coder → CadQuery	✓	0.923	0.579	0.445	0.213	—	16.1s	$0.033
CAD-Coder R1	✓	0.920	0.693	0.533	0.232	—	4.8s	$0.005
Claude Opus 4.7 → OpenSCAD	✓	0.914	0.548	0.481	0.262	—	40.9s	$0.356
DeepSeek R1 (reasoning) → CadQuery	✓	0.919	0.592	0.535	0.283	—	95.4s	$0.044
Gemini 2.5 Pro → OpenSCAD	×	0.908	0.531	0.410	0.206	—	19.9s	$0.099
DeepCAD	×	0.902	0.443	0.382	0.175	—	4.9s	$0.020
GPT-5 Mini → OpenSCAD	×	0.905	0.436	0.383	0.115	—	17.9s	$0.008
Llama 3.3 70B → OpenSCAD	×	0.895	0.426	0.329	0.109	—	24.0s	$0.020
Hunyuan3D-2	×	0.855	0.192	0.096	0.005	—	33.8s	$0.058
Adam (CADcrush) kernel error: BRepCheck_NotClosed	×	0.000	—	—	—	—	7.0s	$0.286
Trellis 3D kernel error: BRepCheck_NotClosed	×	0.000	—	—	—	—	9.2s	$0.046
Spline AI	×	0.850	0.090	0.046	0.001	—	8.4s	$0.041
Claude Haiku 4.5 → CadQuery kernel error: BRepCheck_NotClosed	×	0.000	—	—	—	—	6.2s	$0.024