Unverified50% confidenceConceptExact time
Constrained decoding can only guarantee that the output format is legal, not that it is semantically self-consistent; when the schema allows fields to be freely combined while mutually exclusive relationships are written only in natural language prompts, small models may generate parseable but business-nonsensical JSON.
1
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50%
Confidence
Long-term
Relevance
10/16/2026
First Seen
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Related Claims
UnverifiedConstrained decoding can only guarantee that the syntactic structure of the output is legal (shape); it cannot guarantee the semantic correctness of the output content.76% similarUnverifiedStructured output refers to forcing a language model to generate responses according to a predefined format (most commonly JSON Schema) rather than free text.74% similarVerifiedConstrained Decoding guarantees at the sampling level that outputs will conform to a specified JSON Schema or regular expression; typical open-source implementations include Outlines, Guidance, and LM Format Enforcer.74% similarUnverifiedConstrained decoding dynamically blocks candidate words that do not conform to the target grammar or schema when the model generates each token, ensuring the output structure is legal at the decoding level.73% similarUnverifiedGrammar-constrained decoding filters out token candidates that do not conform to the target format in real time during model generation, making it physically impossible for the model to output incorrectly formatted content, but it still cannot eliminate semantic errors.72% similar
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