Custom GPT models are tailored versions of GPT, fine-tuned to perform specific tasks or to better understand specific problems & domains.
Imagine it like this: GPT4 is a jack of all trades, master of none. A custom model is specifically built and focused on specific tasks, and have a higher success rate and being able to effectively perform those tasks compared to general purpose GPT models.
The response of an AI always depends on a prompt. A prompt, and reply, are interlinked. The better the prompt, the better the reply.
Prompt engineering is a genuine, growing skill, that as a youth, you should push yourself to learn. A prompt is effectively the instructions you give to an AI, to get the response you desire.
A good prompt is clear, concise, and well directed. It minimizes ambiguity and aligns the AIs responses with user intentions.
Learn how to ask for exactly what you want, and do not shy away from further elaborating on your problem.
Sometimes, long, winding philosophical prompts may surprise you in their nature; but you must make a genuine attempt at feeding the AI with large amounts of useful context.
By using well-crafted prompts, you can create an AI assistant that not only understands the tasks at hand but also aligns with the conversational tone and context appropriate for your audience.