LMArena, the community platform redefining how the world measures the progress of AI, today announced it has raised $150 million in new funding, achieving a post-money valuation of $1.7 billion, nearly triple the valuation following its seed round in May 2025. Funding was led by Felicis and UC Investments (University of California), with participation from Andreessen Horowitz, The House Fund, LDVP, Kleiner Perkins, Lightspeed Venture Partners and Laude Ventures. The raise reflects a shared conviction across the industry: AI cannot scale responsibly without transparent and continuous third-party evaluations.

LMArena is an open platform where everyone can access and interact with the world's leading AI models and contribute to AI progress through real-world feedback. Built with scientific rigor and transparency at its core, LMArena enables developers, researchers, knowledge workers and enthusiasts to compare model outputs, uncover performance differences and advance the reliability of AI systems. With a commitment to open access, reproducible methods and diverse human judgment, LMArena is building the foundation for the world to understand, shape and benefit from AI.