Last Updated on September 30, 2025 by Editorial Team Author(s): Harsh Chandekar Originally published on Towards AI. If you’ve ever asked a large language model (LLM) like GPT or Gemini a question and received a response that sounded too smooth to be wrong — but was completely made up — you’ve met the phenomenon of hallucination. These aren’t hallucinations in the psychedelic sense, but in the sense of confidently fabricated details. Think of your overly confident friend who will inv...