Perplexity AI is an AI-powered search engine and research assistant that combines large language models with real-time web search. It provides direct, cited answers to questions by searching the web, reading sources, and synthesizing information with inline references. Available as a free tool and a paid Pro tier with access to more powerful models and deeper research capabilities.
- AI-powered search with real-time web access and inline source citations
- Pro Search mode for multi-step research with follow-up questions
- Support for file uploads, image analysis, and document Q&A
- API access for developers building search-augmented AI applications