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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
55builds
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8 groups · 12 builds in Reference

Nissan Skyline GT-R (R34) from instructions built by GPT 6 AstraInstructions

Nissan Skyline GT-R (R34)LEGO 76917

GPT 6 Astra Xhigh

Codex CLI · v0.160.1

Build score

85.4%
Accuracy
7.7M tokens$11.5429m 52s
Nissan Skyline GT-R (R34) from instructions built by Claude Sonnet 5.5Instructions

Nissan Skyline GT-R (R34)LEGO 76917

Claude Sonnet 5.5 Xhigh

Claude Code · v2.1.293

Build score

70.2%
Accuracy
545.4M tokens$135.433h 39m
Nissan Skyline GT-R (R34) from instructions built by GPT 6.1 SolInstructions

Nissan Skyline GT-R (R34)LEGO 76917

GPT 6.1 Sol Ultra

Codex CLI · v0.160.1

Build score

65.1%
Accuracy
38.7M tokens$6.963h 47m
Nissan Skyline GT-R (R34) from instructions built by Claude Opus 5.5Instructions

Nissan Skyline GT-R (R34)LEGO 76917

Claude Opus 5.5 Xhigh

Claude Code · v2.1.293

Build score

27.9%
Accuracy
199.4M tokens$60.493h 10m
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
Nissan Skyline GT-R (R34) from instructions built by Claude Haiku 5.5Instructions

Nissan Skyline GT-R (R34)LEGO 76917

Claude Haiku 5.5 Xhigh

Claude Code · v2.1.293

Build score

18.9%
Accuracy
39.8M tokens$6.331h 53m
Nissan Skyline GT-R (R34) from instructions built by Grok 4.6Instructions

Nissan Skyline GT-R (R34)LEGO 76917

Grok 4.6 Xhigh

Grok Build · v1.0.46

Build score

12.4%
Accuracy
19.1M tokens$10.7758m 23s
Nissan Skyline GT-R (R34) from instructions built by GPT 6 LunaInstructions

Nissan Skyline GT-R (R34)LEGO 76917

GPT 6 Luna Max

Codex CLI · v0.160.1

Build score

10.0%
Accuracy
106.1M tokens$1.763h 49m