Opus 5.5 built a fully playable city sim inside Minecraft, traffic and all
Angaisb_ · x · 2026-10-22
A viral demo of Claude Opus 5.5: the model constructed an entire city-builder simulation called Microlandia inside Minecraft. It's not a static build — it's fully playable, with working zoning, citizens, and traffic systems. Another showcase of Opus 5.5's coding and reasoning capabilities.
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