# Metadata Source URL:: https://en.wikipedia.org/wiki/Perplexity Topics:: #ai, #nlp --- # Perplexity - Wikipedia ## Highlights > [!quote]+ Updated on 311022_095930 > > In information theory, perplexity is a measurement of how well a probability distribution or probability model predicts a sample. It may be used to compare probability models. A low perplexity indicates the probability distribution is good at predicting the sample