P3D-Bench - Assembly-3D Geometry: leaderboard
P3D-Bench (2026) Assembly-3D on 203 annotated multi-part assemblies: geometric fidelity of the CadQuery or OpenSCAD whole-assembly program to the ground truth. Programs are compiled, meshed and aligned to the ground truth, invalid outputs take the worst value, and each general model runs with its maximum thinking budget; the score is on a 0-100 scale averaged over output formats, higher is better.
Metric: Geometry bucket score (0-100) (equal-weight mean of normalized F-scores at 0.05 and 0.01, normal consistency, Chamfer distance and IoU) on 203 annotated multi-part assemblies (CadQuery and OpenSCAD outputs), the model writes a parametric CAD program that is compiled, meshed and aligned to the ground truth; invalid outputs take the worst value; each general model runs with its maximum thinking budget; averaged over the output formats; higher is better. Source: arxiv.org. Saturation forecast: Around February 2027. 8 models tracked.
Top models
| # | Model | Score | Overall rank |
|---|---|---|---|
| 1 | GPT-5.5 (xHigh) | 58.6 | #49 (GPT-5.5) |
| 2 | Gemini 3.1 Pro (Preview) (High) | 56.6 | #94 (Gemini 3.1 Pro (Preview)) |
| 3 | Claude Opus 4.6 (Max) | 52.5 | #102 (Claude Opus 4.6) |
| 4 | Qwen 3.6 Plus (Thinking) | 31.4 | #222 (Qwen 3.6 Plus) |
| 5 | GLM-5V Turbo | 28.4 | #344 |
| 6 | Seed 2.0 Pro (High) | 26.7 | #211 (Seed 2.0 Pro) |
No result here: #1 Claude Fable 5.2, #2 Gemini 4 Carbon, #5 Claude Opus 5.5.
Interactive version: theaggregate.ai/benchmark?slug=p3d-bench-assembly-3d-geometry · How It Works · Data refreshed daily, snapshot 2026-11-13.