Outlines

Structured text generation for LLMs

Outlines enables guaranteed structured generation from LLMs using finite state machines. Generate JSON, regex patterns, and custom formats with 100% validity.

Panel Reviews

The Builder

Developer Perspective

Ship

“Guaranteed valid JSON from LLMs — no retry loops needed. The FSM approach is mathematically elegant and reliable.”

The Skeptic

Reality Check

Ship

“If you need structured outputs from open models, Outlines is the correct solution. Not a hack, but a proper constraint system.”

The Futurist

Big Picture

Ship

“Constrained generation will be built into every inference engine. Outlines pioneered the approach.”