---
title: Retrieval-augmented generation
slug: p8ie0159
canonical_url: https://docs.coveo.com/en/p8ie0159/
collection: glossary
source_format: adoc
---
# Retrieval-augmented generation
{doctitle} (RAG) is a [generative AI](https://docs.coveo.com/en/n9e90153/) technique that combines relevant content retrieval and content generation to enhance the output of a generative large language model (LLM).
By [grounding](https://docs.coveo.com/en/nccf0415/) the LLM to the retrieved content, it allows the LLM to generate content that's more accurate, contextually relevant, and up to date.

[Relevance Generative Answering (RGA)](https://docs.coveo.com/en/nbtb6010/) uses (RAG) to generate answers to user queries.
A [Passage Retrieval (CPR)](https://docs.coveo.com/en/oaie9196/) [model](https://docs.coveo.com/en/1012/) retrieves the passages for your enterprise's (RAG) system to enhance your large language model (LLM)-powered applications.