As of now, GPT-4 has not been publicly released yet and it is still under development. It is not available for free use at the moment. However, there are some ways to access GPT-3 for free such as signing up for OpenAI's GPT-3 API waiting list or using pre-built applications that utilize GPT-3. Keep in mind that GPT-4 may have different pricing and access policies compared to GPT-3 once it is released. Additionally, it is important to note that claims about the superiority of GPT-4 compared to GPT-3 are speculative and cannot be confirmed until GPT-4 is actually released and tested.