A hallucination is when a model confidently outputs information that is false or invented. Checking facts and using RAG over trusted sources reduces it.
In practice, Hallucination shows up across many AI tools. Below are 8 tools where the idea is useful - open any to see it applied.
The most widely used general-purpose AI chat assistant
AI assistant specialising in long documents and careful reasoning
Google's natively multimodal AI assistant
Open-source desktop and Docker app for private chat over your own documents
Desktop and mobile chat client that runs on your own API keys or a hosted plan
xAI chat assistant with live X data, image generation and voice modes
Open-source desktop assistant that runs local models and connects to cloud APIs
Self-hosted, multi-provider chat platform with agents and team accounts