Unverified50% confidenceFactExact time
The OpenAPI 3.0 Schema Object is based on a subset of JSON Schema with adjustments (such as the nullable keyword and no support for certain composition keywords).
1
Sources
50%
Confidence
Long-term
Relevance
10/18/2026
First Seen
Sources
Related Entities
Related Claims
UnverifiedOpenAI's Structured Outputs require additionalProperties: false in the JSON Schema and that all fields be listed in required, with optional fields expressed as nullable.73% similarUnverifiedOpenAI requires a specific response_format JSON schema, whereas alternative backends may require a different system prompt or specific tool call definitions.73% similarUnverifiedn8n's OpenAI node must have Output Format set to JSON Object, otherwise the return value will not automatically expand into a list structure.71% similarVerifiedSetting 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.69% similarUnverifiedDifferent models adhere to JSON Schema to varying degrees and may omit required fields, write numbers as strings, change key names in nested objects, or return explanatory text instead of JSON.69% similar
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