T4-R1 in five minutes
A model does not contain your private notes.
Retrieval finds passages and puts them in the call.
The 2020 RAG paper is the usual citation for that pattern.
If retrieval misses, a fluent answer is still ungrounded.
Say which passage you used.
Two systems can share a model and differ only in the notes they retrieve. The notes are the part you control.
Sources and go deeper
- Lewis and co-authors, Retrieval-Augmented Generation for Knowledge-Intensive NLP Tasks, 2020 paper last checked 2026-10
- Retrieval-augmented generation — Wikipedia wikipedia last checked 2026-10