Perplexity

Perplexity (often referred to as Perplexity AI) is an AI-powered "Answer Engine" founded in the US in 2022 by researchers from companies such as OpenAI and Google. It breaks away from the traditional search engine model of simply listing web page links, focusing instead on providing users with conversational, integrated, and accurate answers. Its key features include: 1. Real-time online search: It can retrieve the latest information from the internet in real time when asking a question, ensuring the timeliness of the answer. 2. Transparent source citations: Each generated answer comes with explicit web page source links (Citations), allowing users to trace and verify the reliability of information, making it ideal for academic and in-depth research. 3. Multiple models and modes: It supports calling cutting-edge large models such as GPT-4, Claude, and Mistral; it offers multiple modes including general search, professional search, and deep research, meeting diverse needs from daily quick searches to complex domain reports. 4. Multimodal and file interaction: It supports image generation, text rewriting, and uploading PDF/text/image files for content analysis and question answering. 5. Available on all platforms: Provides web version, iOS/Android mobile app, and extensions such as Chrome plugin.