# What is an AI hallucination?

Source: https://cloudbrain.in/glossary/hallucination
Last updated: 2026-11-10

An AI hallucination is an output from an AI model that sounds plausible but is false or unsupported, such as an invented clause, figure or reference. In architecture and construction, hallucinated code clauses, quantities or specifications could cause real errors if not caught.

## Why does an AI hallucination matter for architects, engineers and contractors in India?

In architecture and construction, hallucinated code clauses, quantities or specifications could cause real errors if not caught. Grounding AI in your own documents and reviewing every output are the main defences.

## What is an example of an AI hallucination?

Asked for a staircase requirement, an AI tool cites a code clause that does not exist; the reviewer checks the actual code and corrects it.

## Where does CloudBrain come in?

Our [AI training and governance](/services/training) service helps architecture, engineering and construction firms put this into practice. See the related terms below, or browse the full [AEC × AI glossary](/glossary).