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> Prompt engineering doesn't feel like an activity that creates sustainable AI advancement.

Chatgpt was created from gpt via prompt engineering? An inverse chatgpt where user answers questions instead of the other way around also has applications.

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Only in that the very initial version was GPT + prompt. ChatGPT is heavily fine-tuned using both handwritten examples and later on rated examples from its own output. The prompt is still relevant but the fine-tuning is the biggest thing that makes it work like a chatbot.

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