Arena Intelligence

Arena Intelligence Inc. is an independent company incorporated in April 2025 that operates the LMArena platform (renamed "Arena" on January 28, 2026). The project originated at the University of California, Berkeley within the LMSYS group; its co-creators were Wei-Lin Chiang, Anastasios N. Angelopoulos, and Ion Stoica. The company raised a $100M seed round (~$600M valuation) and, in January 2026, a $150M Series A (~$1.7B valuation).