They have something closer to a simple Hello World example here: https://platform.openai.com/docs/guides/gpt/function-calling https://platform.openai.com/docs/

They have something closer to a simple Hello World example here: https://platform.openai.com/docs/guides/gpt/function-calling https://platform.openai.com/docs/guides/gpt/function-calling That example needs a bit of work I think. In Step 3, they're not really using the returned function_name; they're just assuming it's the only function that's been defined, which I guess is equivalent for this simple example with just one function but less instructive. In Step 4, I believe they should also have sent the function definition block again a second time since model calls in the API are memory-less and independent. They didn't, although the model appears to guess what's needed anyway in this case.