SGLang
Fast serving framework for LLMs and vision-language models.
- Stars
- 37.2K
- Forks
- 9.6K
- Open issues
- 5.7K
- Last commit
- 2026-10-15
Live from the GitHub API · updated 2026-10-15
What is SGLang?
SGLang is a high-performance serving engine with RadixAttention prefix caching, structured output and a frontend language for complex LLM programs. It is used in production by many AI labs.
Key features
- RadixAttention prefix caching
- Fast structured (JSON) decoding
- OpenAI-compatible server
- Multi-GPU parallelism
System requirements
- Platforms
- Linux · Docker
- GPU
- NVIDIA or AMD data-center GPUs recommended
- Python
- 3.10+
How to install SGLang
Summarized from the project’s README. Projects change quickly — check the GitHub page for the latest instructions.
pip
- 1Install.
pip install --upgrade pip pip install "sglang[all]" - 2Launch a server.
python -m sglang.launch_server --model-path Qwen/Qwen2.5-7B-Instruct --port 30000
Strengths
- Excellent performance
- Great for structured outputs
Limitations
- Server-oriented
SGLang alternatives compared
| Software | Stars | License | Platforms | VRAM |
|---|---|---|---|---|
| SGLang Fast serving framework for LLMs and vision-language models. | 37.2K | Apache-2.0 | — | |
| vLLM High-throughput LLM serving engine with PagedAttention. | 93.8K | Apache-2.0 | — | |
| llama.cpp LLM inference in C/C++ — the engine behind most local AI apps. | 131.2K | MIT | — | |
| Ollama Get up and running with large language models locally. | 183.2K | MIT | — | |
| Jan Open-source ChatGPT-style desktop app that runs 100% offline. | 45K | AGPL-3.0 | — | |
| GPT4All Private, on-device chat with local document Q&A. | 77.4K | MIT | — |
FAQ
Is SGLang free?
Yes — SGLang is open-source software released under the Apache-2.0 license. Check the license (and any model weight licenses) before commercial use.
Does SGLang run on Windows, Mac and Linux?
SGLang supports: Linux, Docker.
What hardware do I need for SGLang?
NVIDIA or AMD data-center GPUs recommended
How do I install SGLang?
1. Install. 2. Launch a server.
What are the best SGLang alternatives?
Popular alternatives include vLLM, llama.cpp, Ollama, Jan. See the comparison table on this page.