Compute is not cheap! I think it is well known (Altman himself has said this) that openAI is burning a lot of money currently, but they are fine for now considering the 10B investment from MSFT and the revenue from subscription and API. It's a critical moment for AI companies and openAI is trying to get as large a share of the market as they can by undercutting virtually any other commercial model and offering 10x the value.