Promptengineering

Fine-Tuning vs RAG vs Prompting — Which One Should You Actually Use?

Most AI builders confuse prompting, RAG, and fine-tuning — and end up wasting time solving the wrong problem. The truth is simple: prompting fixes behaviour, RAG fixes knowledge gaps, and fine-tuning fixes deeply specific style or performance requirements. The smartest way to build AI systems is in layers: start with better prompts, add RAG when your AI needs real-world or company-specific information, and only consider fine-tuning when consistency and specialization truly demand it. Most teams jump to the most complex solution too early — when a simpler fix would have worked better.