---
title: AI hallucination
slug: nccf0505
canonical_url: https://docs.coveo.com/en/nccf0505/
collection: glossary
source_format: adoc
---
# AI hallucination
{doctitle} is a phenomenon where a generative large language model (LLM) creates text that's nonsensical or inaccurate.
[Relevance Generative Answering (RGA)](https://docs.coveo.com/en/nbtb6010/) uses [grounding](https://docs.coveo.com/en/nccf0415/) to reduce the chances of AI hallucinations.