https://techcrunch.com/2023/07/06/openai-makes-gpt-4-generally-available/

OpenAI today announced the general availability of GPT-4, its latest text-generating model, through its API.

Starting this afternoon, all existing OpenAI API developers “with a history of successful payments” can access GPT-4. The company plans to open up access to new developers by the end of this month, and then start raising availability limits after that “depending on compute availability.”