How much does OpenAI or AI services cost?

OpenAI API usage exact cost is a little hard to determine as it depends on the required response length and some other factors. However, a very rough estimate would be 2US$/thousand responses if you use the GPT 4o or 4.1 mini model. You can also set the usage limit on the OpenAI platform. It is extremely cheap and it will only get cheaper because of the competition in the AI market from various platforms.