Randomness

AI is not precise and not 100% reproducible. It doesn't matter how good your prompt is, AI will generate different outputs. AI is really random in nature. Cory Doctorow and his amazing post: LLMs are slot-machines cleverly explains the random nature of LLM outputs. If you need 100% precision, Generative AI is not for you, LLMs are not for you.

Generative AI is just trying to predict the next sequence of tokens. That's all, an auto-complete on steroids. You need to understand the random nature of Gen AI when using LLMs.