Definition
What is fine-tuning?
Fine-tuning is additional training of a language model on your own examples so it better matches a style or task. It is not a substitute for up-to-date documents, and it is usually later than retrieval.
Fine-tuning is expensive to maintain when facts change. Start with RAG unless you have a stable task, labeled examples, and a reason retrieval cannot do the job. RAG vs fine-tuning
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