PARAM-006 · Constraint Solving & Editability · difficulty 3/5

Editable flange (bolt circle param sweep)

sha256:0ce7b1d445aa9088…

§1Prompt verbatim

Flange: hub Ø 30 × 20 mm, plate Ø 100 × 8 mm, six Ø 7 mm bolt holes on PCD 'D'. Build it once at D = 80 mm, then expose 'D' as a parameter. We will edit D to 70, 75, 85, 90 mm and re-evaluate.

§2Ground-truth spec

shells1

watertighttrue

manifoldtrue

acceptance ε±0.05 mm

parametric edits

D : 80 → 70 (ΔV expected 0 mm³)

D : 70 → 75 (ΔV expected 0 mm³)

D : 75 → 85 (ΔV expected 0 mm³)

D : 85 → 90 (ΔV expected 0 mm³)

§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)

n=4 senior engineers

0.8859✓

Claude Opus 4.7 → CadQuery

Anthropic + CadQuery 2.4

0.8329✓

OpenAI o4 (reasoning) → CadQuery

OpenAI + CadQuery 2.4

0.8197✓

Claude Sonnet 4.6 → CadQuery

Anthropic + CadQuery 2.4

0.7427✓

GPT-5 → CadQuery

OpenAI + CadQuery 2.4

Qwen3 Coder → CadQuery

Alibaba + CadQuery 2.4

0.61311✗

CAD-Coder R1

CAD-Coder Labs (research)

Claude Opus 4.7 → OpenSCAD

Anthropic + OpenSCAD 2024.06

0.5440✗

Claude Haiku 4.5 → CadQuery

Anthropic + CadQuery 2.4

0.53311✗

Gemini 2.5 Pro → OpenSCAD

Google + OpenSCAD 2024.06

0.5200✗

DeepSeek R1 (reasoning) → CadQuery

DeepSeek + CadQuery 2.4

0.5129✗

GPT-5 Mini → OpenSCAD

OpenAI + OpenSCAD 2024.06

0.43215✗

Llama 3.3 70B → OpenSCAD

Meta + OpenSCAD 2024.06

0.31516✗

DeepCAD

Wu et al. 2021 (research)

no manifold solid produced

Trellis 3D

Microsoft Research

—4✗

no manifold solid produced

Gemini 2.5 Flash → CadQuery

Google + CadQuery 2.4

—59✗

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.	ParamEdit	ConSolve	Parametric Range Integrity	P@1	p50	latency	cost
Human Baseline (Mech-E)	✓	0.978	0.893	0.887	0.847	1.000	—	517.3s	$6.914
Claude Opus 4.7 → CadQuery	✓	0.975	0.792	0.823	0.735	1.000	—	29.3s	$0.398
OpenAI o4 (reasoning) → CadQuery	✓	0.967	0.830	0.810	0.739	1.000	—	85.8s	$1.255
Claude Sonnet 4.6 → CadQuery	✓	0.957	0.705	0.711	0.732	0.000	—	17.3s	$0.068
GPT-5 → CadQuery	✓	0.953	0.761	0.743	0.706	0.000	—	32.9s	$0.169
Adam (CADcrush)	✓	0.945	0.792	0.772	0.754	0.000	—	8.2s	$0.266
Qwen3 Coder → CadQuery	✓	0.944	0.633	0.648	0.550	0.000	—	18.0s	$0.035
CAD-Coder R1	✓	0.938	0.585	0.570	0.532	0.000	—	7.7s	$0.005
Zoo Text-to-CAD	✓	0.939	0.731	0.734	0.631	0.000	—	5.6s	$0.209
Claude Opus 4.7 → OpenSCAD	✓	0.937	0.605	0.570	0.579	0.000	—	37.0s	$0.343
Claude Haiku 4.5 → CadQuery	✓	0.931	0.489	0.533	0.447	0.000	—	7.7s	$0.021
Gemini 2.5 Pro → OpenSCAD	✓	0.929	0.595	0.537	0.487	0.000	—	27.5s	$0.082
DeepSeek R1 (reasoning) → CadQuery	✓	0.933	0.698	0.768	0.664	0.000	—	86.1s	$0.037
GPT-5 Mini → OpenSCAD	×	0.911	0.464	0.471	0.406	0.000	—	16.4s	$0.012
Llama 3.3 70B → OpenSCAD	×	0.901	0.413	0.405	0.357	0.000	—	28.3s	$0.023
DeepCAD	×	0.867	0.276	0.278	0.239	0.000	—	5.9s	$0.018
Spline AI	×	0.859	0.050	0.048	0.018	0.000	—	5.7s	$0.042
Hunyuan3D-2	×	0.855	0.048	0.044	0.040	0.000	—	28.8s	$0.082
Trellis 3D kernel error: BRepCheck_NotClosed	×	0.000	—	—	—	0.000	—	10.7s	$0.049
Gemini 2.5 Flash → CadQuery kernel error: BRepCheck_NotClosed	×	0.000	—	—	—	0.000	—	11.7s	$0.019