LMArena is now Arena
What began as a PhD research experiment to compare AI language models has grown over time into something broader, shaped by the people who use it.
News
Video Arena Is Live on Web
Video Arena is now available at: lmarena.ai/video!
What started last summer as a small Discord bot experiment has grown into something much more substantial. It quickly became clear that this wasn’t just a novelty for generating fun videos—it was a rigorous way to measure and understand
Fueling the World’s Most Trusted AI Evaluation Platform
We’re excited to share a major milestone in LMArena’s journey. We’ve raised $150M of Series A funding 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.
LMArena's Ranking Method
Since launching the platform, developing a rigorous and scientifically grounded evaluation methodology has been central to our mission. A key component of this effort is providing proper statistical uncertainty quantification for model scores and rankings. To that end, we have always reported confidence intervals alongside Arena scores and surfaced any
The Next Stage of AI Coding Evaluation Is Here
Introducing Code Arena: live evals for agentic coding in the real world
AI coding models have evolved fast. Today’s systems don’t just output static code in one shot. They build. They scaffold full web apps and sites, refactor complex systems, and debug themselves in real time. Many now
New Product: AI Evaluations
Today, we’re introducing a commercial product: AI Evaluations. This service offers enterprises, model labs, and developers comprehensive evaluation services grounded in real-world human feedback, showing how models actually perform in practice.