Harvard and MIT develop 8.3 billion AI agents to simulate global human behavior

An international team led by Harvard and MIT, with participation from OpenAI and Google DeepMind, launched MatrAIx, a system that creates intelligent agents capable of simulating human behavior. The system uses 1,290 dimensions to model people from different backgrounds and lifestyles. These agents can perform tasks such as filling out questionnaires, conversing with customer service representatives, browsing the web, and using applications, with a consistency rate of 91.5% compared to real human behavior. Researchers validated the system through 400 tests covering 10 behavioral attributes, with agents demonstrating the correct behavior in 366 of them. Performance varies depending on the environment: in questionnaires and conversations, the system achieves 92% to 96% accuracy, while in application testing the rate drops to 83%. A set of one million personalities, after validation and quality filtering, was published on Hugging Face for research use.