Fine-tune vs. RAG vs. prompt

Advanced AI Architecture: Strategy, Stack & Daily Practice — lesson 9 of 20 (PLAYBOOK)

Knowledge changes often → RAG. Behavior/format/tone must change → fine-tune. Neither → a better system prompt with examples (cheapest, try first). Most companies that think they need fine-tuning need retrieval and better prompts.

Source: OpenAI — Optimizing LLM accuracy

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