Lesson 2072 of 2116
Structured Output: Getting JSON You Can Actually Parse
How to make models reliably produce machine-readable output.
Lesson map
What this lesson covers
Learning path
The main moves in order
- 1The premise
- 2structured output
- 3JSON mode
- 4schemas
Concept cluster
Terms to connect while reading
Section 1
The premise
Asking for JSON in the prompt and hoping is unreliable. Modern APIs offer structured-output modes — schema enforcement, JSON mode, constrained decoding — that make machine-readable output dependable.
What AI does well here
- Producing valid JSON 100% of the time with schema enforcement
- Matching exact field names, types, and enums you specify
- Reducing brittle parsing and regex extraction code
- Making AI features composable with the rest of your stack
What AI cannot do
- Guarantee the values inside the JSON are correct, only that the structure is
- Replace validation — schemas enforce shape, not business rules
- Work in every model and every provider identically
Key terms in this lesson
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