That’s just on computing power. You are forgetting the human costs of ongoing development, maintenance of ChatGPT, power, SRE/operations, cooling costs, and et cetera.

Now M$ is planning to create a specialized chip for AI which comes with its own R&D budget and ongoing costs.

If it proves successful, ChatGPT will become a household brand and M$ could easily ask for $500 per month or more for professional/corporate usage.