LMSYS ORG

ABOUT

Large Model Systems (LMSYS Corp.) is a 501(c)(3) non-profit focused on incubating open-source projects and research. Our mission is to make large AI models accessible to everyone by co-developing open models, datasets, systems, and evaluation tools. We conduct cutting-edge machine learning research, develop open-source software, train large language models for broad accessibility, and build distributed systems to optimize their training and inference.

Directors and officers

Lianmin Zheng, Ying Sheng, Wei-Lin Chiang, Zihao Ye, Yusi Chen

Members of flagship projects

SGLang major developers: Lianmin Zheng, Ying Sheng, Liangsheng Yin, Yineng Zhang, Ke Bao, Byron Hsu, Chenyang Zhao, Zhiqiang Xie Shuo Yang, Yichuan Wang, Shiyi Cao. More information see SGLang GitHub.

FlashInfer: Zihao Ye. More information see FlashInfer GitHub.

Chatbot Arena (graduated): See https://blog.lmarena.ai/about

Vicuna LLM: Wei-Lin Chiang, Joseph E. Gonzalez, Dacheng Li, Zhuohan Li, Zi Lin, Ying Sheng, Ion Stoica, Zhanghao Wu, Eric P. Xing, Hao Zhang, Lianmin Zheng, Siyuan Zhuang, Yonghao Zhuang

Project memberships are granted to individuals who have demonstrated outstanding technical contributions and research impact in LMSYS projects, as evaluated by our advisory board of distinguished academics and industry leaders.

Advisors

Joseph E. Gonzalez, Ion Stoica, Eric P. Xing, Hao Zhang

Sponsors

LMSYS is supported by donations from the following institutions:

NVIDIA, AMD, a16z, Hyperbolic, RunPod, Kaggle, MBZUAI, Together, Anyscale, HuggingFace

We also thank the following companies for providing API credits to serve their models on Chatbot Arena (graduated): Alibaba, Anthropic, Cohere, Databricks, Google, Mistral, OpenAI, Reka, Zhipu AI, 01ai

We welcome diverse forms of donations and sponsorships, including but not limited to cash, computing devices (e.g., GPUs), and cloud credits. Please contact us at lmsys.org@gmail.com to learn more about sponsorships and benefits.

History

LMSYS originated from a multi-university collaboration involving UC Berkeley, Stanford, UCSD, CMU, and MBZUAI in 2023. It was established as a non-profit corporation in September 2024 to incubate early-stage open-source and research projects. It became well-known for its impactful flagship projects, including:

These projects feature open models with millions of downloads, crowdsourced platforms with millions of users, and efficient systems that are orders of magnitude faster.

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