What it means. A hallucination is when an AI model states something false as if it were true. The model is not lying. It is predicting plausible text, and sometimes the most plausible-sounding answer is simply wrong. Why it matters. Hallucinations look exactly like correct answers. They come with the same confident tone, so a…

What it means. A token is a small chunk of text an AI model reads and writes, usually a few characters or part of a word. Models do not process whole sentences at once. They process sequences of tokens. Why it matters. Cost, speed, and limits are all measured in tokens, not words. Longer prompts…

What it means. An API (application programming interface) is a defined way for one piece of software to ask another for something and get a structured answer back. When your app uses an AI model, it talks to that model through an API. Why it matters. Almost every AI feature you add depends on an…