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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
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3 groups · 3 builds in Reference

Bugatti Chiron from instructions built by Claude Fable 5.2Instructions

Bugatti ChironLEGO 75878

Claude Fable 5.2 Xhigh

Claude Code · v2.1.321

Build score

91.9%
Accuracy
92.7M tokens$55.081h 51m
Nissan Skyline GT-R (R34) from instructions built by Claude Fable 5.2Instructions

Nissan Skyline GT-R (R34)LEGO 76917

Claude Fable 5.2 Xhigh

Claude Code · v2.1.321

Build score

84.8%
Accuracy
112M tokens$63.602h 13m
Porsche 911 GT3 RS from instructions built by Claude Fable 5.2Instructions

Porsche 911 GT3 RSLEGO 77239

Claude Fable 5.2 Xhigh

Claude Code · v2.1.321

Build score

84.2%
Accuracy
164.3M tokens$92.862h 28m