Get Predictable AI Outputs with JSON Schema

If you’re tired of getting random or messy results from OpenAI, this guide is for you.

I walk through how to use JSON schema directly with OpenAI’s HTTP API to force the model to return exactly the fields and formats you need—no more guessing, no more post-processing endless text.

What’s inside:

- Why you should use JSON schema for structured, stable AI responses

- How to build a schema that always returns the right fields (no missing values, no surprises)

- Setting up a workflow to process any input (like CVs from email attachments) and extract exactly the data you need

- Parsing and validating the output—so you can use it right away, with zero cleanup

The end result: You get consistent, valid JSON for every request, whether you’re extracting resume data, product info, or anything else.

I use this setup for almost all my projects—because I want results I can trust, not unpredictable blobs of text.

Check out the guide and start getting reliable data from OpenAI.

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