What is an example of perplexity?
Perplexity measures how predictable the words in a sentence are.
Consider the phrase: “I sat at the bar and ordered a glass of red…” A low-perplexity (i.e., highly predictable) ending would be “wine.” Conversely, a high-perplexity (less predictable) ending might be “jelly beans.”
AI-generated text often has lower perplexity than human writing. Perplexity is therefore used by tools like QuillBot’s AI detector to guess whether something was written by a person or an AI.
