Is GPT for free?

I'm curious, is GPT available for free? I've heard a lot about its capabilities and how it can be used for various tasks, but I'm not sure if I need to pay for access. Is there a way to use GPT without any cost, or is it strictly a paid service? And if it's not free, can you provide some insight into the pricing structure and what features are included with the different payment options? I'm just trying to get a better understanding of how GPT works and if it's something that would be beneficial for me to invest in.