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RAG vs Fine-Tuning: Which Does Your AI Need?

DODavid Okafor· VP, Digital Transformation May 26, 2026 6 min read

Teams often assume they need to fine-tune a model. Usually they need retrieval-augmented generation (RAG) instead — or first. Here's how to tell them apart.

The difference

RAG gives a model access to your current knowledge at query time. Fine-tuning changes the model's behaviour and style by training it on examples. They solve different problems.

Which to use

  • Need answers grounded in your data? RAG
  • Need a specific tone or format? Fine-tuning
  • Most business use cases start with RAG and add tuning only if needed

We design AI systems that use each technique where it actually helps.

DO

David Okafor

VP, Digital Transformation

Part of the TechWorld Solutions team helping enterprises migrate, modernize, and secure their technology.