Unverified50% confidenceFactExact time
Some APIs enable constrained decoding to force the model to output JSON conforming to the Schema, while others only use the Schema as a hint, so enums can greatly reduce but not completely eliminate the probability of the model fabricating values.
1
Sources
50%
Confidence
Medium-term (~90 days)
Relevance
10/15/2026
First Seen
Valid until: 1/13/2027
Sources
Related Entities
Related Claims
VerifiedSetting additionalProperties: false in a JSON Schema rejects any extra fields not explicitly declared in the schema, eliminating the possibility of the model inventing additional fields.79% similarUnverifiedWhen the string content sent by the model is unambiguous, valid JSON, parsing it directly carries no risk and is a low-cost fix for the schema validation degradation problem.78% similarUnverifiedOpenAI's function calling outputs invocation parameters in structured JSON format, greatly reducing parsing error rates.73% similarVerifiedDefining typed JSON Schema for tools can reduce format errors and hallucinated parameter filling during model calls, improving call success rates.70% similarUnverified工具调用（Function Calling）要求模型稳定输出符合预定义Schema的结构化JSON，OpenAI、Anthropic等主流模型提供商引入了Constrained Decoding（约束解码）技术在生成时实时过滤不合法token70% similar
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