MEGA Hub
New

MatrAIx: Simulating the World with 8.3 Billion Persona Agents

Published on Aug 3 Submitted by MEGAon Aug 10#1 Paper of the day MatrAIx

Authors

Do you know Xiaomin Li?You can claim authorship or link another user.Do you know Yuexing Hao?You can claim authorship or link another user.Do you know Jianheng Hou?You can claim authorship or link another user.Do you know Jintao Huang?You can claim authorship or link another user.Do you know Qianfeng Wen?You can claim authorship or link another user.Do you know Shirley Huang?You can claim authorship or link another user.Do you know Yifan Liu?You can claim authorship or link another user.Do you know Xiaoyi Liu?You can claim authorship or link another user.Do you know Yilan Fan?You can claim authorship or link another user.Do you know Yijun Wang?You can claim authorship or link another user.Do you know Koutian Wu?You can claim authorship or link another user.Do you know Ruoqi Gao?You can claim authorship or link another user.Do you know Muhammad Ahmed Mohsin?You can claim authorship or link another user.Do you know Jing Tang?You can claim authorship or link another user.Do you know Brihi Joshi?You can claim authorship or link another user.Do you know Heming Liu?You can claim authorship or link another user.Do you know Zheyuan Deng?You can claim authorship or link another user.Do you know Zonglin Di?You can claim authorship or link another user.Do you know Sankalp Jajee?You can claim authorship or link another user.Do you know Jiuyao Lu?You can claim authorship or link another user.Do you know Zhiwei Zhang?You can claim authorship or link another user.Do you know Saksham Kapoor?You can claim authorship or link another user.Do you know Ishan Gupta?You can claim authorship or link another user.Do you know Yunhan Zhao?You can claim authorship or link another user.Do you know Chanwoo Park?You can claim authorship or link another user.Do you know Yucheng Lu?You can claim authorship or link another user.Do you know Bing Hu?You can claim authorship or link another user.Do you know Weihang Xiao?You can claim authorship or link another user.Do you know Aravind Mohan?You can claim authorship or link another user.Do you know Hanwen Xing?You can claim authorship or link another user.Do you know Runyu Zhang?You can claim authorship or link another user.Do you know Mihir Kulshreshtha?You can claim authorship or link another user.Do you know Yuanda Xu?You can claim authorship or link another user.Do you know Qianyu Zhu?You can claim authorship or link another user.Do you know Dianzhuo Wang?You can claim authorship or link another user.Do you know Yuxin Xiao?You can claim authorship or link another user.Do you know Bowen Jiang?You can claim authorship or link another user.Do you know Yongye Su?You can claim authorship or link another user.Do you know Wenhao Chai?You can claim authorship or link another user.Do you know Zuxin Liu?You can claim authorship or link another user.Do you know Lawrence Yunliang Chen?You can claim authorship or link another user.Do you know Xuandong Zhao?You can claim authorship or link another user.Do you know Ethan Ye?You can claim authorship or link another user.Do you know Shivam Patel?You can claim authorship or link another user.Do you know Jason Xie?You can claim authorship or link another user.Do you know Alex Martin Richmond?You can claim authorship or link another user.Do you know Weixiang Ding?You can claim authorship or link another user.Do you know Emre Okcular?You can claim authorship or link another user.Do you know Diya Mathew?You can claim authorship or link another user.Do you know Ziheng Wang?You can claim authorship or link another user.Do you know Rana M. Shahroz Khan?You can claim authorship or link another user.Do you know Zhejian Peng?You can claim authorship or link another user.Do you know Fang Wu?You can claim authorship or link another user.Do you know Fan Nie?You can claim authorship or link another user.Do you know Xinyang Han?You can claim authorship or link another user.Do you know Yubin Kim?You can claim authorship or link another user.Do you know Jiawei Zhang?You can claim authorship or link another user.Do you know Zhenting Qi?You can claim authorship or link another user.Do you know Huangyuan Su?You can claim authorship or link another user.Do you know Xu Pan?You can claim authorship or link another user.Do you know Abinitha Gourabathina?You can claim authorship or link another user.Do you know Hyewon Jeong?You can claim authorship or link another user.Do you know Hemanth Neelgund Ramesh?You can claim authorship or link another user.Do you know Kumail Alhamoud?You can claim authorship or link another user.Do you know Kimia Hamidieh?You can claim authorship or link another user.Do you know Zidi Xiong?You can claim authorship or link another user.Do you know Samuel Schmidgall?You can claim authorship or link another user.Do you know Pengrui Han?You can claim authorship or link another user.Do you know Yepeng Huang?You can claim authorship or link another user.Do you know Yongheng Wang?You can claim authorship or link another user.Do you know Bowen Yang?You can claim authorship or link another user.Do you know Alex Gu?You can claim authorship or link another user.Do you know Yuchu Wang?You can claim authorship or link another user.Do you know Akshay Paruchuri?You can claim authorship or link another user.Do you know Brenna Li?You can claim authorship or link another user.Do you know Hejie Cui?You can claim authorship or link another user.Do you know Jiayuan Ding?You can claim authorship or link another user.Do you know Chaosheng Dong?You can claim authorship or link another user.Do you know Jiahao Wang?You can claim authorship or link another user.Do you know Yixuan He?You can claim authorship or link another user.Do you know Chi Wang?You can claim authorship or link another user.Do you know Pamela Bhattacharya?You can claim authorship or link another user.Do you know Tianyi Peng?You can claim authorship or link another user.Do you know Paul Pu Liang?You can claim authorship or link another user.Do you know Mitchell Gordon?You can claim authorship or link another user.Do you know Yilun Du?You can claim authorship or link another user.Do you know Marinka Zitnik?You can claim authorship or link another user.Do you know James Zou?You can claim authorship or link another user.Do you know Prasanna Tambe?You can claim authorship or link another user.Do you know Philip Torr?You can claim authorship or link another user.Do you know Emily Fox?You can claim authorship or link another user.Do you know Asu Ozdaglar?You can claim authorship or link another user.Do you know Dawn Song?You can claim authorship or link another user.

Abstract

Human evaluation of AI systems and digital products is costly, slow, and difficult to scale. Offline evaluations are more scalable but often abstract away human diversity and interactive behavior. We therefore introduce MatrAIx, a population-scale simulated-user evaluation infrastructure for testing AI systems and digital products with heterogeneous users. MatrAIx has three core components: First, Persona 8B contains 8.3 billion persona records represented by 1,290 categorical dimensions. Records are either sampled from a dependency graph that preserves correlated attributes or derived from human-authored profiles. We release a quality-filtered coreset of approximately 1 million personas, comprising 599,847 human-grounded and 400,000 synthetic records. Second, the MatrAIx Playground provides four environments in which diverse users evaluate and interact with digital products: Survey, AI Chatbot, Web, and App. Third, MatrAIx provides 1,010 application tasks spanning more than 25 domains, including Commerce, Software, Finance, and Healthcare. We conducted 18,189 evaluation trials across eight representative tasks. Persona agents were powered by three LLMs: Claude Opus 4.8, GPT 5.5, and Claude Haiku 4.5. The resulting feedback captures how decisions and preferences vary across persona backgrounds, including hesitation after a price increase, willingness to continue after an AI assistant fails, and latency tolerance. We conducted two main validation studies: First, a 400-trial controlled study evaluated persona adherence across ten behavioral attributes and all four environments. The declared behavior was expressed or correctly suppressed in 366 trials (91.5%). Second, human and LLM judges evaluated the extraction quality of human-grounded personas. Overall, MatrAIx provides an end-to-end infrastructure for evaluating AI systems and digital products with diverse simulated human users.

Community

00