Does SGLang support vision models?

Yes, SGLang supports popular multi-modal models including LLaVA, Phi-3-Vision, and Qwen2-VL for high-performance vision-language tasks.

Can SGLang generate validated JSON outputs?

Yes, SGLang supports JSON schema, regex, and grammar-based constraints to ensure model outputs strictly match your required data formats.

What is RadixAttention in SGLang?

RadixAttention is an innovation in SGLang that automatically detects and reuses common prefixes across different inference requests, significantly reducing latency for agents and multi-turn conversations.

How does SGLang performance compare to vLLM?

While vLLM is excellent for general text generation, SGLang is up to 5x faster for agentic workloads with shared prompts and up to 10x faster for few-shot prompting due to its caching mechanism.

Is the SGLang server compatible with OpenAI's API?

Yes, SGLang provides an OpenAI-compatible API server, allowing you to use it as a drop-in replacement for existing OpenAI SDK implementations.

SGLang Inference Serving

Name: SGLang Inference Serving
Author: zechenzhangAGI

byzechenzhangAGI

•

384

Data Science & ML

Optimizes LLM serving and structured generation using RadixAttention prefix caching for high-performance agentic workflows.

About

SGLang is a high-performance serving framework designed to accelerate LLM and VLM inference through its innovative RadixAttention mechanism, which automatically caches and reuses KV prefixes. It excels in complex scenarios requiring structured outputs like JSON and regex, multi-turn conversations, and agentic workflows where shared context is frequent. By providing up to 5x faster inference than traditional engines and 3x faster JSON decoding, it serves as a robust foundation for production-scale AI applications needing both speed and precision.

Key Features

384 GitHub stars
Multi-modal support for Vision Language Models (VLMs)
Fast structured generation with JSON schema and regex constraints
RadixAttention for automatic prefix caching and KV cache reuse
High-performance serving with tensor parallelism and continuous batching
OpenAI-compatible API for seamless integration with existing SDKs

Use Cases

Implementing low-latency multi-turn chatbots that leverage shared conversation history
Building high-speed AI agents with extensive system prompts and tool-calling capabilities
Generating strict, schema-validated JSON data for data extraction and automated workflows

About

Key Features

384 GitHub stars
Multi-modal support for Vision Language Models (VLMs)
Fast structured generation with JSON schema and regex constraints
RadixAttention for automatic prefix caching and KV cache reuse
High-performance serving with tensor parallelism and continuous batching
OpenAI-compatible API for seamless integration with existing SDKs

Use Cases

Implementing low-latency multi-turn chatbots that leverage shared conversation history
Building high-speed AI agents with extensive system prompts and tool-calling capabilities
Generating strict, schema-validated JSON data for data extraction and automated workflows