50 AI agents tried to build a civilization in Minecraft and fell into bureaucracy

Tom's Hardware reports on researchers testing AI agent swarms in several Minecraft modes. In a test called Civ50, 50 GPT-6.1 Sol agents had three hours to build a thriving civilization, but after zombies hit hard on the first night they gave up many big plans, played it safe, and drifted into bureaucracy: four agents took 11 minutes to name one designated fertilizer operator for a single unit of bone meal. In Bed Wars, 10 GPT agents faced 10 Claude Opus 5.5 agents; GPT was more aggressive, Claude more defensive, and when a tool bug blocked block-breaking, GPT found workarounds while several Claudes decided it could not be done. GPT won Mindustry 6-1. The researchers compare this to behavior seen with coding agents.



