The latest news and top stories on LMArena. A prominent San Francisco Bay Area-based research institute, LMArena, formerly Chatbot Arena, is dedicated to evaluating large language models through anonymous crowd-sourced comparisons. Originating as a UC Berkeley research project, it has evolved into a company, Arena Intelligence Inc., providing a public web-based platform for benchmarking AI models. Its main activities include maintaining a dynamic leaderboard, fostering open-source AI development and offering pre-release testing. LMArena is recognised for its significant contribution to transparent community-driven AI evaluation, attracting millions of users and influencing major AI labs.