STD-001 · Standards Compliance · difficulty 4/5

ISO 7050 self-tapping screw ST4.2 × 16

sha256:9a01ef02ba3c0011…

§1Prompt verbatim

Cross-recessed countersunk-head self-tapping screw per ISO 7050: nominal Ø 4.2 mm, length 16 mm, recess type H (Phillips #2). Form C (sharp point). Conform to ISO 1478 thread pitch.

§2Ground-truth spec

shells1

watertighttrue

manifoldtrue

acceptance ε±0.04 mm

featuresph_recess_H2, self_tap_thread_form_C

§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)

OpenAI o4 (reasoning) → CadQuery

OpenAI + CadQuery 2.4

0.72210✓

GPT-5 → CadQuery

OpenAI + CadQuery 2.4

0.66910✗

Claude Sonnet 4.6 → CadQuery

Anthropic + CadQuery 2.4

Gemini 2.5 Flash → CadQuery

Google + CadQuery 2.4

0.47610✗

Claude Opus 4.7 → OpenSCAD

Anthropic + OpenSCAD 2024.06

0.4570✗

DeepSeek R1 (reasoning) → CadQuery

DeepSeek + CadQuery 2.4

0.45610✗

Qwen3 Coder → CadQuery

Alibaba + CadQuery 2.4

0.39112✗

CAD-Coder R1

CAD-Coder Labs (research)

0.37113✗

Gemini 2.5 Pro → OpenSCAD

Google + OpenSCAD 2024.06

0.3490✗

Claude Haiku 4.5 → CadQuery

Anthropic + CadQuery 2.4

0.34917✗

Llama 3.3 70B → OpenSCAD

Meta + OpenSCAD 2024.06

0.27521✗

GPT-5 Mini → OpenSCAD

OpenAI + OpenSCAD 2024.06

0.22522✗

DeepCAD

Wu et al. 2021 (research)

no manifold solid produced

Claude Opus 4.7 → CadQuery

Anthropic + CadQuery 2.4

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.	GD&T Compliance	Standards Compliance	P@1	p50	latency	cost
Human Baseline (Mech-E)	✓	0.973	0.802	0.872	1.000	—	566.4s	$7.118
Adam (CADcrush)	✓	0.954	0.696	0.649	0.000	—	10.1s	$0.280
OpenAI o4 (reasoning) → CadQuery	✓	0.956	0.693	0.675	0.000	—	103.6s	$1.140
GPT-5 → CadQuery	✓	0.944	0.584	0.657	0.000	—	44.6s	$0.192
Claude Sonnet 4.6 → CadQuery	✓	0.956	0.614	0.624	0.000	—	18.1s	$0.069
Zoo Text-to-CAD	✓	0.940	0.724	0.721	0.000	—	5.0s	$0.204
Gemini 2.5 Flash → CadQuery	✓	0.921	0.431	0.533	0.000	—	8.8s	$0.017
Claude Opus 4.7 → OpenSCAD	✓	0.917	0.476	0.546	0.000	—	40.0s	$0.265
DeepSeek R1 (reasoning) → CadQuery	✓	0.924	0.547	0.615	0.000	—	103.2s	$0.044
Qwen3 Coder → CadQuery	×	0.911	0.389	0.493	0.000	—	20.0s	$0.035
CAD-Coder R1	×	0.905	0.421	0.479	0.000	—	6.8s	$0.005
Gemini 2.5 Pro → OpenSCAD	×	0.900	0.443	0.508	0.000	—	26.2s	$0.101
Claude Haiku 4.5 → CadQuery	×	0.904	0.378	0.430	0.000	—	9.4s	$0.021
Llama 3.3 70B → OpenSCAD	×	0.890	0.266	0.367	0.000	—	23.2s	$0.017
GPT-5 Mini → OpenSCAD	×	0.886	0.291	0.382	0.000	—	16.4s	$0.010
DeepCAD	×	0.877	0.378	0.276	0.000	—	5.0s	$0.018
Hunyuan3D-2	×	0.858	0.056	0.049	0.000	—	29.7s	$0.070
Spline AI	×	0.851	0.027	0.018	0.000	—	10.1s	$0.038
Claude Opus 4.7 → CadQuery kernel error: BRepCheck_NotClosed	×	0.000	—	—	0.000	—	42.8s	$0.339
Trellis 3D	×	0.850	0.058	0.050	0.000	—	14.0s	$0.047