Structured output
Also called: JSON output
By HubAI editorial team · Source checked: 24 October 2026What does it mean?
Output constrained to a defined shape, such as named fields in a JSON object. A valid shape makes software integration easier but does not establish factual correctness.
Picture this
An invoice reader returns supplier, date and total in separate fields. Your application checks that the total matches the source and rejects missing or inconsistent values.
Where you’ll come across it
Document extraction, classification and moving AI results into other software. Validate types, permitted values and business rules before taking an action.
What it doesn’t mean
Valid JSON can still contain a wrong amount or an invented date. Treat schema validation and fact checking as separate gates.
Draw the permission boundary
A short exercise · use fictional or non-sensitive material.
- Sketch a simple assistant that drafts a reply but cannot send it. Use invented recipients.
- Mark which tools it can read from, which it could write to and where approval is required.
- Try an instruction inside a sample document asking it to ignore those limits. Check that actual permissions still block the action.
Which safeguard is enforced by the application rather than a polite instruction?
Did that make it clearer?
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Written and explained by HubAI. The reference below lets you go deeper; it is not an endorsement of a particular product.
Technical reference: huggingface.co ↗