A: Hi, sorry Power Formulas needs you to provide your own OpenAI keys to use GPT-4. I know that there are some lifetime deals that claim you can get unlimited GPT-4 usage for a one-time fee, but I'm afraid these are not real GPT-4, but rather some much less powerful language models. That's why we ask you to provide your own OpenAI key to use the real GPT-4 models. Best, Wei.