MIT and Harvard build AI simulation of 8.3 billion virtual people called MatrAIx

alex_verem · x · 2026-11-11

Researchers at MIT and Harvard built MatrAIx, an AI simulation of 8.3 billion virtual people—roughly Earth's entire population. Each persona carries up to 1,290 traits (age, language, job, personality, habits, risk appetite) and behaves like real users: filling surveys, chatting with bots, shopping, and clicking through websites.

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