Abstract:
Anthropic recently released Opus 4.6, a new LLM that has already received favorable reviews for its coding abilities. While coding puzzles have their charm, we are more interested in how well it can build Lego models. In this investigation, we compare the Lego-building abilities of Opus 4.6 against other frontier LLMs. The LLMs generated their Lego designs in .ldr format which a human inspected with LeoCAD. The results were scored by a human and by an LLM judge. The results indicate that Opus 4.6 can build Legos.
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