Does OpenAI API cost money?

Hello there, I'm curious about the OpenAI API and I was wondering if it comes with a price tag. I've heard great things about the service and how it can enhance various applications and projects, but I'm still unsure about the financial aspect. Could you clarify if there are any costs associated with using the OpenAI API? And if so, could you provide some insight into the pricing structure or any potential payment options? Thank you for your time.