JSON, prompt formatting, hallucinations. If you feel uncomfortable, you have probably had to implement complex solutions to circumvent these problems. What if there was a way to increase the reliability of Large Language Models at no cost? Enter structured generation. In this talk we will explore how the output of models can be steered at no extra cost, why this improves their efficiency and accuracy significantly and makes generation less sensitive to the specifics of the prompt. By the end of the talk, we'll understand how we can start benefiting from this breakthrough today by using the open source library Outlines.