Formally validated LLM output — JSON schema instead of hoping for the right format.
Category · Agentics
When the model needs to return JSON.
Structured output describes generating formally validated outputs from an LLM — JSON Schema, Pydantic models, TypeScript types. Instead of hoping the model "hits the right format", schema constraints force it there.
In agent architectures this is the default. Free text survives only where the conversation is with a human.
See also
