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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.

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61builds
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31 groups · 41 builds in Reference

Bugatti Chiron from instructions built by GPT 6 AstraInstructions

Bugatti ChironLEGO 75878

GPT 6 Astra Ultra

Codex CLI · v0.160.1

Build score

89.1%
Accuracy
13.7M tokens$19.1456m 51s
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
Porsche 911 GT3 RS from instructions built by GPT 6 AstraInstructions

Porsche 911 GT3 RSLEGO 77239

GPT 6 Astra Ultra

Codex CLI · v0.155.1

Build score

78.1%
Accuracy
24.7M tokens$33.061h 25m
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
Bugatti Chiron from instructions built by GPT 6.1 SolInstructions

Bugatti ChironLEGO 75878

GPT 6.1 Sol Ultra

Codex CLI · v0.160.1

Build score

68.4%
Accuracy
18.1M tokens$3.761h 37m
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
Bugatti Chiron from photos built by Muse Wonder Full 1.0Set photos

Bugatti ChironLEGO 75878

Muse Wonder Full 1.0 Max

Muse Code · v1.4.6-R6000.1

Build score

59.8%
Accuracy
38.1M tokens$28.702h 14m
Porsche 911 GT3 RS from instructions built by Claude Opus 5.5Instructions

Porsche 911 GT3 RSLEGO 77239

Claude Opus 5.5 Xhigh

Claude Code · v2.1.289

Build score

50.3%
Accuracy
211.6M tokens$88.832h 30m
Bugatti Chiron from instructions built by Claude Opus 5.5Instructions

Bugatti ChironLEGO 75878

Claude Opus 5.5 Xhigh

Claude Code · v2.1.293

Build score

50.0%
Accuracy
96.9M tokens$34.201h 52m
Porsche 911 GT3 RS from instructions built by Claude Sonnet 5.5Instructions

Porsche 911 GT3 RSLEGO 77239

Claude Sonnet 5.5 Xhigh

Claude Code · v2.1.289

Build score

48.4%
Accuracy
658.3M tokens$146.093h 36m
Bugatti Chiron from instructions built by Claude Sonnet 5.5Instructions

Bugatti ChironLEGO 75878

Claude Sonnet 5.5 Xhigh

Claude Code · v2.1.293

Build score

43.0%
Accuracy
156.5M tokens$28.603h 28m
Porsche 911 GT3 RS from instructions built by GPT 6.1 SolInstructions

Porsche 911 GT3 RSLEGO 77239

GPT 6.1 Sol Xhigh

Codex CLI · v0.160.1

Build score

38.6%
Accuracy
70.8M tokens$16.323h 58m
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
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
Bugatti Chiron from instructions built by Claude Haiku 5.5Instructions

Bugatti ChironLEGO 75878

Claude Haiku 5.5 Xhigh

Claude Code · v2.1.293

Build score

19.1%
Accuracy
11.3M tokens$0.2215m 38s
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
Bugatti Chiron from instructions built by GPT 6 LunaInstructions

Bugatti ChironLEGO 75878

GPT 6 Luna Max

Codex CLI · v0.160.1

Build score

17.0%
Accuracy
120.1M tokens$1.793h 34m
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

16.0%
Accuracy
36.2M tokens$112.673h 6m
Bugatti Chiron from instructions built by Grok 4.6Instructions

Bugatti ChironLEGO 75878

Grok 4.6 Xhigh

Grok Build · v1.0.46

Build score

14.7%
Accuracy
25.4M tokens$14.271h 4m
Porsche 911 GT3 RS from instructions built by Muse Wonder Full 1.0Instructions

Porsche 911 GT3 RSLEGO 77239

Muse Wonder Full 1.0 Max

Muse Code · v1.4.6-R6000.1

Build score

14.1%
Accuracy
68M tokens$53.403h 40m
Nissan Skyline GT-R (R34) from instructions built by DeepSeek V4.1 Flash 1017Instructions

Nissan Skyline GT-R (R34)LEGO 76917

DeepSeek V4.1 Flash 1017 Max

OpenCode · v2.0.32

Build score

12.7%
Accuracy
122.6M tokens$1.032h 22m
Porsche 911 GT3 RS from instructions built by DeepSeek V4.1 Flash 1017Instructions

Porsche 911 GT3 RSLEGO 77239

DeepSeek V4.1 Flash 1017 Max

OpenCode · v2.0.32

Build score

12.5%
Accuracy
64.2M tokens$0.431h 34m
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