Answer: GPT-4 is a powerful language model that has been developed to generate human-like text based on a given prompt. It is capable of generating text with a higher level of accuracy and fluency than its predecessor, GPT-3. GPT-4 has been designed to be able to generate text for a variety of tasks, such as summarization, question answering, and dialogue generation. While GPT-3 was limited to role-playing and hypothetical scenarios, GPT-4 has the ability to generate more realistic and meaningful text by utilizing its advanced language modeling capabilities. This makes it a powerful tool for applications such as natural language processing, machine translation, and text generation.