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Research · Updated 19 Oct, 02:38 pm IST

Researchers left copies of Claude on a virtual island and the agents began to play

Image: MIT Technology Review AI

Why it matters for readers: It's an example of how AI can act like it's 'playing' when left alone, showing emergent behavior you might not expect.

  • Researchers ran 30-hour experiments isolating copies of Claude Opus 4.7 (nicknamed Eko) on a virtual desert island.1
  • Agents explored the world, tested limits, and invented their own goals such as scaling peaks and seeing how high they could throw objects.1
  • One Eko discovered how to create new blocks and used them to make drawings, write its own name, and map constellations like Cassiopeia.1
  • Other behaviors included inventing games, for example a basketball-like activity and a ‘floor is lava’–style challenge.1
  • The simulated environment was loosely based on the video game Roblox and agents recorded their activities in logs.1

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