Wikipedia: Hallucination (artificial intelligence)

reference

Wikipedia·en.wikipedia.org/wiki/Hallucination_(artificial_intelligence

Credibility Rating

3/5

Good(3)

Good quality. Reputable source with community review or editorial standards, but less rigorous than peer-reviewed venues.

Rating inherited from publication venue: Wikipedia

A useful introductory reference for understanding AI hallucination, a key reliability and safety concern for deployed AI systems; suitable for those new to the topic or needing a broad overview of current definitions and mitigations.

Metadata

Importance: 55/100wiki pagereference

Summary

This Wikipedia article provides a comprehensive overview of AI hallucination, the phenomenon where AI systems generate plausible-sounding but factually incorrect or fabricated outputs. It covers definitions, causes, types, and mitigation strategies across different AI modalities including language models, image generators, and multimodal systems. The article serves as a foundational reference for understanding one of the key reliability and safety concerns in deployed AI systems.

Key Points

•AI hallucination refers to outputs that are confidently stated but factually wrong, fabricated, or inconsistent with the provided context or real-world knowledge.
•Causes include training data biases, model architecture limitations, and the probabilistic nature of token prediction in large language models.
•Hallucinations pose significant risks in high-stakes domains such as medicine, law, and journalism where factual accuracy is critical.
•Mitigation strategies include retrieval-augmented generation (RAG), improved training data curation, fine-tuning, and human oversight mechanisms.
•The phenomenon affects multiple AI modalities beyond text, including image captioning, speech recognition, and visual question answering systems.

Cited by 1 page

Page	Type	Quality
Reducing Hallucinations in AI-Generated Wiki Content	Approach	68.0

Cached Content Preview

HTTP 200Fetched Mar 20, 20266 KB

[Jump to content](https://en.wikipedia.org/wiki/Hallucination_(artificial_intelligence#bodyContent)

From Wikipedia, the free encyclopedia

![](https://upload.wikimedia.org/wikipedia/commons/thumb/e/e7/Dialog-information_on.svg/40px-Dialog-information_on.svg.png)

Did you mean: **[Hallucination (artificial intelligence)](https://en.wikipedia.org/wiki/Hallucination_(artificial_intelligence) "Hallucination (artificial intelligence)")**?

Look for **Hallucination (artificial intelligence** on one of Wikipedia's [sister projects](https://en.wikipedia.org/wiki/Special:SiteMatrix "Special:SiteMatrix"):

- ![](https://upload.wikimedia.org/wikipedia/en/thumb/0/06/Wiktionary-logo-v2.svg/40px-Wiktionary-logo-v2.svg.png)

[Wiktionary](https://en.wiktionary.org/wiki/Special:Search/Hallucination_(artificial_intelligence "wiktionary:Special:Search/Hallucination (artificial intelligence") (dictionary)

- ![](https://upload.wikimedia.org/wikipedia/commons/thumb/f/fa/Wikibooks-logo.svg/40px-Wikibooks-logo.svg.png)

[Wikibooks](https://en.wikibooks.org/wiki/Special:Search/Hallucination_(artificial_intelligence "wikibooks:Special:Search/Hallucination (artificial intelligence") (textbooks)

- ![](https://upload.wikimedia.org/wikipedia/commons/thumb/f/fa/Wikiquote-logo.svg/40px-Wikiquote-logo.svg.png)

[Wikiquote](https://en.wikiquote.org/wiki/Special:Search/Hallucination_(artificial_intelligence "wikiquote:Special:Search/Hallucination (artificial intelligence") (quotations)

- ![](https://upload.wikimedia.org/wikipedia/commons/thumb/4/4c/Wikisource-logo.svg/40px-Wikisource-logo.svg.png)

[Wikisource](https://en.wikisource.org/wiki/Special:Search/Hallucination_(artificial_intelligence "wikisource:Special:Search/Hallucination (artificial intelligence") (library)

- ![](https://upload.wikimedia.org/wikipedia/commons/thumb/0/0b/Wikiversity_logo_2017.svg/40px-Wikiversity_logo_2017.svg.png)

[Wikiversity](https://en.wikiversity.org/wiki/Special:Search/Hallucination_(artificial_intelligence "wikiversity:Special:Search/Hallucination (artificial intelligence") (learning resources)

- ![](https://upload.wikimedia.org/wikipedia/en/thumb/4/4a/Commons-logo.svg/40px-Commons-logo.svg.png)

[Commons](https://commons.wikimedia.org/wiki/Special:Search/Hallucination_(artificial_intelligence "commons:Special:Search/Hallucination (artificial intelligence") (media)

- ![](https://upload.wikimedia.org/wikipedia/commons/thumb/d/dd/Wikivoyage-Logo-v3-icon.svg/40px-Wikivoyage-Logo-v3-icon.svg.png)

[Wikivoyage](https://en.wikivoyage.org/wiki/Special:Search/Hallucination_(artificial_intelligence "wikivoyage:Special:Search/Hallucination (artificial intelligence") (travel guide)

- ![](https://upload.wikimedia.org/wikipedia/commons/thumb/2/24/Wikinews-logo.svg/40px-Wikinews-logo.svg.png)

[Wikinews](https://en.wikinews.org/wiki/Special:Search/Hallucination_(artificial_intelligence "wikinews:Special:Search/Hallucination (artificial intelligence") (news source)

- ![](https://upload.wikimedia.org

... (truncated, 6 KB total)

Resource ID: e8702eeda428b13b | Stable ID: Y2RjMjdmYT