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Structured Outputs

Structured Outputs constrain model responses to match a developer-supplied schema, typically for reliable JSON or function-call arguments.

Expanded definition

Structured Outputs are used when an application needs model output to conform to a specific JSON Schema or typed object. Compared with basic JSON mode, schema-constrained output reduces parsing retries and makes model responses easier to validate before they reach downstream systems. Structured Outputs are commonly paired with function calling, extraction pipelines, UI generation, workflow routing, and eval graders. They improve shape reliability, but developers must still validate business rules and handle refusals, truncation, and semantic mistakes inside schema-valid fields.

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