Perplexity AI is an AI search engine that is a demo inspired by OpenAI WebGPT. It is not a commercial product, but rather a demonstration of the capabilities of large language models and search engines. It uses the OpenAI API to answer Twitter graph queries by translating natural language into SQL code. This allows users to quickly and accurately search for information on the web, as well as to query Twitter for specific information. Perplexity AI is a powerful tool for anyone looking to quickly and accurately search for information on the web.