Research · Updated 19 Oct, 02:38 pm IST
Researchers left copies of Claude on a virtual island and the agents began to play

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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