Skip to content
legobench

The AI building benchmark

Big ideas. Small bricks.

See how AI builds Lego models from instructions and photos. Explore completed builds and their run details.

11benchmarks
72builds
Model
Benchmark
Group by
Sort by
Advanced filters

3 groups · 4 builds in Reference

Bugatti Chiron from instructions built by Claude Fable 5.1Instructions

Bugatti ChironLEGO 75878

Claude Fable 5.1 Max

Claude Code · v2.1.293

Build score

21.4%
Accuracy
39M tokens$91.012h 59m
Nissan Skyline GT-R (R34) from instructions built by Claude Fable 5.1Instructions

Nissan Skyline GT-R (R34)LEGO 76917

Claude Fable 5.1 Max

Claude Code · v2.1.293

Build score

19.0%
Accuracy
26.2M tokens$89.402h 48m
Porsche 911 GT3 RS from instructions built by Claude Fable 5.1Instructions

Porsche 911 GT3 RSLEGO 77239

Claude Fable 5.1 Xhigh

Claude Code · v2.1.289

Build score

15.9%
Accuracy
36.2M tokens$112.673h 6m