Controlling ChatGPT with Custom Instructions or API System Messages (2023)

Custom Instructions in ChatGPT allow you to provide additional context and even format the type of response you want from the system every time you interact with it. In the OpenAI Chat Completions API you can access the same functionality using the System and Assistant messages. In this short course, learn how to take advantage of these features to get more consistent and customizable responses from both systems.

Learning objectives
How to use Custom Instructions in ChatGPT
The difference between system and assistant instructions
How to use the system and assistant messages in the OpenAI Chat Completions API