It appears to be fine-tuning: "These models have been fine-tuned to both detect when a function needs to be called (depending on the user’s input) and to respo

It appears to be fine-tuning: "These models have been fine-tuned to both detect when a function needs to be called (depending on the user’s input) and to respond with JSON that adheres to the function signature." https://openai.com/blog/function-calling-and-other-api-updates https://openai.com/blog/function-calling-and-other-api-updat...