Draft:Perplexity AI

Perplexity AI, or simply Perplexity, is a web search engine integrated with artificial intelligence. It uses OpenAI's GPT large language model to process queries and synthesize a natural language response based on web search results. With a conversational approach, Perplexity allows users to ask follow-up questions and receive an answer with citations to its sources from the internet.

The Perplexity AI company was founded in August 2022 by Aravind Srinivas, Denis Yarats, Johnny Ho, and Andy Konwinski. It launched its flagship search engine on 7 December 2022, and has since released a Google Chrome extension and an iOS app. In March 2023, Perplexity reported that it had acquired US$26 million in series A funding, with approximately 10 million visits each month and 2 million unique visitors in February 2023.

Perplexity AI is built on Microsoft Azure infrastructure and uses Microsoft Bing to research sources on the web. A free and public version of Perplexity employs the GPT-3.5 large language model by OpenAI, whilst the paid Copilot mode uses GPT-4 and has additional features for more in-depth research.