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When would you fine-tune an LLM vs using prompting?

ML Concept: 5-7 minutes to answer

llm-engineeringfine-tuningmust-knowcategory:ai_llm_tools
Updated Jan 18, 2026

Question

Question

When would you fine-tune an LLM vs using prompting?

Expected time to answer: 5-7 minutes

Difficulty: intermediate

Why This Is Asked: Tests understanding of LLM customization strategies and cost-benefit analysis

Tags: llm-engineering fine-tuning must-know


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