Opus 5.5 designs a buildable LEGO Microduck: 1,113 parts, zero collisions

alvelda · x · 2026-09-25

victormustar showed off Opus 5.5 designing a life-size LEGO Microduck: it used 1,113 real LEGO parts, verified 3,204 connections with zero collisions, ensured every step is buildable with center of mass inside the feet, generated a 141-page instruction booklet (237 steps), priced every part in-browser and prepared the BrickLink order. Riley Brown called it the coolest thing he's seen AI do.

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