How is OpenAI so cheap?

I'm curious to understand how OpenAI manages to offer its services at such a low cost. Given the complexity and computing power required for advanced AI capabilities, it seems remarkable that they're able to keep prices affordable. Is there a unique technology or approach they've adopted that allows them to do this? Or is it simply a matter of efficient scaling and optimization of resources? I'd love to hear more about the factors that contribute to OpenAI's cost-effectiveness.