Team of 8 AI agents beats best solo agent building Colosseum in Minecraft (0.72 vs 0.58)

DimitrisPapail · x · 2026-10-02

A developer ran an experiment building the Colosseum in Minecraft with 16 AI agents: 8 communicated via a shared messaging board as a team, while 8 worked solo in parallel. The team's worst agent (0.72) beat the best solo performer (0.58), all running on Qwen 3.8 27B via RTX 5090s.

It's a striking demo of test-time communication paying off — agents sharing information mid-task acts as a capability amplifier, which the author frames as the beginning of an era of 'Swarm engineering'.

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