OpenAI has a specific test for measuring hallucination rates called PersonQA. It includes a set of facts about people to “learn” from and a set of questions about those people to answer.

Hallucination is a blanket term for certain kinds of mistakes made by the large language models (LLMs) that power systems like OpenAI’s ChatGPT or Google’s Gemini. It is best known as a ...

The result is what’s known as the “beast machine theory,” which describes the brain as a prediction machine that updates its “controlled hallucination” via the unending stream of sensory ...