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Perplexity AI is a conversational search engine that uses large language models (LLMs) to answer queries using sources from the web and cites links within the text response. [ 3 ] [ 4 ] Its developer, Perplexity AI, Inc., is based in San Francisco, California .
Perplexity is sometimes used as a measure of the difficulty of a prediction problem. It is, however, generally not a straight forward representation of the relevant probability. For example, if you have two choices, one with probability 0.9, your chances of a correct guess using the optimal strategy are 90 percent.
Perplexity measures how well a model predicts the contents of a dataset; the higher the likelihood the model assigns to the dataset, the lower the perplexity. In mathematical terms, perplexity is the exponential of the average negative log likelihood per token.
Perplexity offers a Pro version for $20 per month that allows users to pick from various large language models, among them OpenAI's GPT-4, Anthropic's Claude 2.1, Google's Gemini, or the venture ...
Perplexity makes money by offering a Pro version for $20 per month that allows users to pick from various large language models, among them OpenAI’s GPT-4, Anthropic’s Claude 2.1, or the ...
It is Perplexity, however, that is taking the biggest gamble, with an AI election hub that features live updates featuring data from The Associated Press and a partnership with the nonprofit voter ...
Perplexity recently announced an experiment with advertising for its core search product in the form of sponsored “follow-up questions”—related questions that the AI system generates and ...
Perplexity is a measurement of how well a probability distribution or probability model predicts a sample. Perplexity may also refer to: Perplexity, a 1990 video game; Perplex City, an alternate reality game (ARG) Perplexity AI, a conversational search engine