LM Arena, the organization behind popular AI leaderboards, lands $100M

In Brief LM Arena, a crowdsourced benchmarking project that major AI labs rely on to test and market their AI models, has raised $100 million in a seed funding round that values the organization at $600 million, according to Bloomberg. Andreessen Horowitz (a16z) and UC Investments, which manages an investment portfolio for the University of California, led the fundraising. Lightspeed Venture Partners, Felicis Ventures, and Kleiner Perkins also participated. 📢We’re excited to share that we’ve raised $100M in seed funding to support LMArena and continue our research on reliable AI. Led by @a16z and UC Investments (@UofCalifornia), we're proud to have the support of those that believe in both the science and the mission. We’re… https://t.co/Aem2jClwHh pic.twitter.com/KEC5BJca8b — lmarena.ai (formerly lmsys.org) (@lmarena_ai) May 21, 2025 Founded in 2023, LM Arena has become something of an AI industry obsession. Primarily run by UC Berkeley-affiliated researchers, LM Arena has part ... Read full article.