LitServe — Fast AI Model Serving Engine

What is LitServe?

LitServe is a high-performance AI model serving engine from Lightning AI. Built on top of FastAPI, it adds batching, streaming output, GPU management, and auto-scaling.

In one sentence: LitServe is a fast AI model serving engine with built-in batching, streaming output, GPU auto-scaling, and multi-model support.

Core Features

1. Automatic Batching

Combines multiple requests into a single GPU inference pass.

2. Streaming Responses

Token-by-token streaming output.

3. Multi-GPU Auto-Scaling

Automatically detects and allocates GPU resources.

4. Multi-Model Endpoints

Deploy multiple models on a single server.

5. OpenAI Compatible

Supports the standard /v1/chat/completions interface.

FAQ

Q: How does it compare to vLLM? A: vLLM focuses on LLMs; LitServe supports any model (vision, audio, tabular).

Q: Production ready? A: Yes — built by Lightning AI with health checks and metrics monitoring.