Step 1: Define your schema

First you must design the JSON Schema that the model should be constrained to follow. See the examples at the top of this guide for reference.

While Structured Outputs supports much of JSON Schema, some features are unavailable either for performance or technical reasons. See here for more details.

Tips for your JSON Schema

To maximize the quality of model generations, we recommend the following:

• Name keys clearly and intuitively
• Create clear titles and descriptions for important keys in your structure
• Create and use evals to determine the structure that works best for your use case