Expired50% confidenceReleaseExact time

OpenAI's Structured Outputs feature, introduced in 2024, enforces output conforming to a Schema at the token sampling level by constructing a finite state machine (FSM) at each generation step to mask tokens that would violate Schema paths.

1

Sources

50%

Confidence

Medium-term (~90 days)

Relevance

7/24/2026

First Seen

This claim has expired. It is kept for the record and no longer describes the current state.

Valid until: 10/22/2026(expired)

Sources

Stable JSON Output from LLMs: A Three-Layer Defense Strategy for Production

Related Claims

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