OpenAI Function Calling Explained

OpenAI's function calling lets the API directly support agents/plugins. Instead of writing complex prompts to force structured output, you pass a 'functions' parameter (an array of function objects, each with name, description, and parameters). The API returns a 'function_call' with the function name and a JSON 'arguments' object. This guarantees the output matches your function signature, reducing errors and retries. For a deeper dive, check out the linked tutorial video.