DFMMOLD-002 · DFM · Injection Mould · difficulty 4/5

Injection-mouldable enclosure half

sha256:1abf0e5d9c3b22d4…

§1Prompt verbatim

Lower half of a hand-held enclosure, 120 × 60 × 25 mm, parting line in the XY plane. Constraint set: ≥1° draft on every vertical wall, uniform 2.0 mm wall, no closed voids, four self-tapping bosses (Ø 4 mm OD, Ø 2 mm core, with gussets), shut-off ledge 0.5 mm overlap.

§2Ground-truth spec

shells1

watertighttrue

manifoldtrue

acceptance ε±0.1 mm

featuresdraft_1deg_min, wall_2.0mm_uniform, boss_x4, shutoff_ledge

§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

0.6119✗

Claude Opus 4.7 → CadQuery

Anthropic + CadQuery 2.4

0.57711✗

Claude Sonnet 4.6 → CadQuery

Anthropic + CadQuery 2.4

0.54011✗

GPT-5 → CadQuery

OpenAI + CadQuery 2.4

0.51011✗

Gemini 2.5 Pro → OpenSCAD

Google + OpenSCAD 2024.06

0.4370✗

Gemini 2.5 Flash → CadQuery

Google + CadQuery 2.4

0.38613✗

Qwen3 Coder → CadQuery

Alibaba + CadQuery 2.4

0.37815✗

CAD-Coder R1

CAD-Coder Labs (research)

0.37615✗

DeepCAD

Wu et al. 2021 (research)

0.36813✗

Claude Opus 4.7 → OpenSCAD

Anthropic + OpenSCAD 2024.06

0.3570✗

GPT-5 Mini → OpenSCAD

OpenAI + OpenSCAD 2024.06

0.34815✗

DeepSeek R1 (reasoning) → CadQuery

DeepSeek + CadQuery 2.4

0.30819✗

Claude Haiku 4.5 → CadQuery

Anthropic + CadQuery 2.4

0.30018✗

Llama 3.3 70B → OpenSCAD

Meta + OpenSCAD 2024.06

0.20725✗

no manifold solid produced

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.	Draft-Angle Compliance	Min-Wall Compliance	Wall-Thickness Uniformity	p50	latency	cost
Human Baseline (Mech-E)	✓	0.959	0.775	0.767	0.849	—	504.3s	$6.058
Zoo Text-to-CAD	✓	0.942	0.708	0.708	0.730	—	5.6s	$0.204
OpenAI o4 (reasoning) → CadQuery	✓	0.940	0.655	0.699	0.634	—	123.5s	$1.181
Claude Opus 4.7 → CadQuery	✓	0.933	0.670	0.691	0.641	—	42.9s	$0.393
Claude Sonnet 4.6 → CadQuery	✓	0.930	0.635	0.638	0.649	—	14.8s	$0.063
GPT-5 → CadQuery	✓	0.922	0.524	0.623	0.594	—	51.1s	$0.218
Gemini 2.5 Pro → OpenSCAD	✓	0.920	0.473	0.500	0.528	—	31.3s	$0.073
Gemini 2.5 Flash → CadQuery	×	0.908	0.467	0.574	0.531	—	13.4s	$0.022
Qwen3 Coder → CadQuery	×	0.903	0.447	0.500	0.503	—	21.0s	$0.029
CAD-Coder R1	×	0.905	0.498	0.484	0.495	—	4.6s	$0.004
DeepCAD	×	0.907	0.369	0.345	0.367	—	5.4s	$0.017
Claude Opus 4.7 → OpenSCAD	×	0.908	0.456	0.605	0.514	—	32.9s	$0.371
GPT-5 Mini → OpenSCAD	×	0.904	0.341	0.411	0.394	—	13.0s	$0.010
DeepSeek R1 (reasoning) → CadQuery	×	0.895	0.495	0.537	0.555	—	69.5s	$0.044
Claude Haiku 4.5 → CadQuery	×	0.899	0.370	0.424	0.405	—	5.8s	$0.020
Llama 3.3 70B → OpenSCAD	×	0.881	0.377	0.434	0.358	—	17.3s	$0.019
Adam (CADcrush) kernel error: BRepCheck_NotClosed	×	0.000	—	—	—	—	10.8s	$0.248
Trellis 3D	×	0.850	0.091	0.205	0.126	—	13.5s	$0.059
Spline AI	×	0.850	0.042	0.100	0.062	—	10.4s	$0.047
Hunyuan3D-2	×	0.850	0.088	0.216	0.138	—	32.6s	$0.064