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Answers · RAG vs Fine-Tuning

Do I need RAG or fine-tuning for my use case?

RAG is the first architecture Aegis tests for many business use cases. Fine-tuning is for domain-specific output style or constrained-vocabulary requirements. Aegis defaults to RAG within the Truth Architecture framework.

By , Founder · Aegis Boardroom · Published 2026-06-23

The short answer.

RAG is the first architecture Aegis tests for many business use cases. Fine-tuning is for domain-specific output style or constrained-vocabulary requirements. Aegis defaults to RAG within the Truth Architecture framework.

This is a question Aegis hears regularly during discovery. Here is the practical way to frame it.

How Aegis Thinks About This

How Aegis approaches this.

Aegis Boardroom's answer is shaped by three frameworks. Truth Architecture: recommendations are designed to be source-traced. Confidence Contract: recommendations are mapped to the canonical Aegis confidence states (I Know / I Think / I'm Inferring / I Don't Know). Life Integrity Engine: recommendations that may increase irreversible-harm risk are flagged for refusal or human review, not softened.

The fastest path is the AI Readiness Assessment: it returns a confidence-mapped band for your specific situation. From there, the Quick Win Plan or a deeper engagement scopes the right paid Aegis next step.

FAQ

Frequently asked questions.

Which one should I start with?

RAG, for most business use cases. It's the first architecture Aegis tests, because it grounds answers in your sources within the Truth Architecture framework.

When is fine-tuning actually the right call?

When you need a domain-specific output style or a constrained vocabulary. Those are the cases fine-tuning is built for; most business problems don't require it.

What's the difference in plain terms?

RAG works from your own sources, so the answers stay grounded in your material. Fine-tuning shapes the model's style or vocabulary up front. Aegis defaults to RAG and uses fine-tuning only when the output requirement calls for it.

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