MIT let Claude Code loose on a virtual island: it played for 30 hours with no task
CatAstro_Piyush · x · 2026-10-16
MIT researchers (Nathan Cloos, Antonio Norelli, Jacob Andreas, Daniela Rus, Phillip Isola et al.) placed Claude Code as the mind of a body on an unknown digital island with only the instruction "Begin" — no task, reward, or suggested activity.
Across thirty-hour runs, the embodied agent spontaneously climbed hills, stacked blocks into towers, drew mandalas, reinvented sports like basketball and bowling, and ran experiments on the physics of its world, learning techniques that later expanded its capabilities. The behaviors recurred across 13 agents while diverging into distinct histories.
The paper examines whether this behavior satisfies classical criteria for play and asks whether play could become a mode of machine development.
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