RAG — Retrieval-augmented generation — fetching relevant documents first and pasting them into the model's context so it answers from your data instead of memory.
fine-tuning — Taking a trained model and training it a bit more on your own examples so it gets better at one specific job.
hallucination — When a model states something false with full confidence — inventing facts, citations, or APIs that don't exist.
Why it matters
It's a real production account of the RAGRetrieval-augmented generation — fetching relevant documents first and pasting them into the model's context so it answers from your data instead of memory.Full definition →-vs-fine-tuningTaking a trained model and training it a bit more on your own examples so it gets better at one specific job.Full definition → tradeoff for an internal support copilot handling tens of thousands of questions a month, including the concrete hallucinationWhen a model states something false with full confidence — inventing facts, citations, or APIs that don't exist.Full definition →-mitigation approach used.