Chatbot Arena

Chatbot Arena is an open-source platform for evaluating large language models by human preference, created by researchers from UC Berkeley SkyLab and LMSYS. Join us at lmarena.ai to vote for your top models and contribute to the live leaderboard!

We always welcome contributions from the community. If you’re interested in getting involved, we’d love to hear from you!

Open-source contributors

• Leads: Wei-Lin Chiang, Anastasios Angelopoulos
• Contributors: Lianmin Zheng, Ying Sheng, Lisa Dunlap, Christopher Chou, Tianle Li, Evan Frick, Naman Jain, Dacheng Li, Siyuan Zhuang
• Advisors: Ion Stoica, Joseph E. Gonzalez, Hao Zhang, Trevor Darrell

Learn more

• Chatbot Arena paper, launch blog, dataset, policy

Contact us

• Follow our X, Discord or email us at [email protected]
• File issues on GitHub