MIT and Harvard Researchers Build MatrAIx Simulation of 8.3 Billion People

Researchers at MIT and Harvard have developed an AI simulation called MatrAIx featuring 8.3 billion virtual personas with up to 1,290 traits each. In tests using models from Anthropic and OpenAI, the personas acted like real users in surveys, chatbots, and apps, staying true to their assigned traits 91.5 percent of the time in controlled trials and 83 percent inside real apps. The team also released one million of these personas for free non-commercial research. Open article →