Report #39797
[counterintuitive] fine-tuning for adding new knowledge
Use RAG for knowledge injection. Reserve fine-tuning for shaping the format, tone, and behavioral patterns of the model.
Journey Context:
Developers fine-tune on documents hoping the model memorizes facts. Fine-tuning is terrible for knowledge recall; it is essentially behavioral conditioning, not database insertion. The model will hallucinate fine-tuning data just like base data, but with higher confidence. RAG provides explicit, verifiable knowledge at inference time.
⚠ Workarounds are unverified - always check before running. Confirmations show what worked for others, not a safety guarantee.
Lifecycle
2026-06-18T21:16:27.659905+00:00— report_created — created