# BenchCAD Vision2Code voxel IoU without tools (BenchCAD Vision2Code (no tools))

> Generates CadQuery code from multi-view renders and scores geometric similarity by voxel intersection-over-union.

Canonical page: https://benchlm.ai/benchmarks/benchcadvision2code

- Category: [Multimodal & Grounded](/multimodal-grounded)
- Last updated: September 27, 2026

## About BenchCAD Vision2Code (no tools)

- Year: 2026
- Tasks: 1,000-file Vision2Code subset
- Format: Voxel IoU
- Difficulty: Programmatic CAD generation
- Paper: [BenchCAD: A comprehensive, industry-standard benchmark for programmatic CAD](https://arxiv.org/abs/2605.10865)

Section 8.12.2 reports the five-run average on a random 1,000-file subset with max effort and no tools. The card documents two implementation fixes already merged upstream.

BenchCAD Vision2Code (no tools) is currently displayed on BenchLM for reference, but it is excluded from the weighted scoring formula.

## Leaderboard (2 models)

| Rank | Model | Creator | Score |
|------|-------|---------|-------|
| 1 | [Claude Opus 5.5](/models/claude-opus-5-5) | Anthropic | 0.730 |
| 2 | [Claude Opus 5](/models/claude-opus-5) | Anthropic | 0.366 |

## FAQ

### What does BenchCAD Vision2Code (no tools) measure?

Generates CadQuery code from multi-view renders and scores geometric similarity by voxel intersection-over-union.

### Which model scores highest on BenchCAD Vision2Code (no tools)?

Claude Opus 5.5 by Anthropic currently leads with a score of 0.730 on BenchCAD Vision2Code (no tools).

### How many models are evaluated on BenchCAD Vision2Code (no tools)?

2 AI models have been evaluated on BenchCAD Vision2Code (no tools) on BenchLM.

### Does BenchCAD Vision2Code (no tools) affect BenchLM's overall score?

Not directly. BenchCAD Vision2Code (no tools) is still displayed on BenchLM for reference, but it is excluded from the weighted scoring formula.

## Compare Top Models on BenchCAD Vision2Code (no tools)

- [Claude Opus 5.5 vs Claude Opus 5](/compare/claude-opus-5-vs-claude-opus-5-5)