LMSYSORG

The Large Model Systems Organization develops large models and systems that are open, accessible, and scalable.

15+Projects
75K+GitHub Stars
1000+Contributors

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News

Announcing the Recipient of the 2026 LMSYS PhD Fellowship

We are delighted to announce the first recipient of the LMSYS Fellowship Program: Will Lin. Following the launch of our Fellowship Program and careful review of applications, we selected Will for his...

June 08, 2026
Blog

Higgs Audio v3 TTS on SGLang-Omni: Real-Time, Controllable Speech for Voice Agents

Today we are announcing end-to-end serving for Higgs Audio v3 TTS on SGLang-Omni. Higgs Audio v3 TTS is Boson AI's text-to-speech model for conversational voice agents: it generates natural and expres...

June 4, 2026
Blog

SGLang and Miles Add Day-0 Support for NVIDIA Nemotron 3 Ultra for Long-Running Autonomous Agents

We are excited to announce that SGLang and Miles support NVIDIA Nemotron 3 Ultra on Day 0\. Agentic AI systems are moving from short prompt-response interactions to persistent workflows that plan, us...

June 4, 2026

Projects

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SGLang
SGLangstars

A fast serving engine for LLMs and VLMs.

SGLang
Chatbot Arena
Chatbot Arena
Chatbot ArenaGraduated

A benchmark platform for LLMs that features anonymous, randomized battles in a crowdsourced manner.

FastChat
FastChatstars

An open and scalable platform for training, finetuning, serving, and evaluating LLM-based chatbots.

FastChat
Vicuna
Vicuna
Vicuna

An open-source chatbot impressing GPT-4 with 90%* ChatGPT quality.

RouteLLM
RouteLLMstars

A framework for serving and evaluating LLM routers.

RouteLLM

Our Sponsors & Partners

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Voltage Park, NVIDIA, Nebius, Google Cloud, AtlasCloud, a16z, AMD, InnoMatrix, Laude Institute, Hyperbolic, NovitaAI, Verda Cloud, Sky9, Kaggle, MBZUAI, Together, RunPod, Anyscale, HuggingFace