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Research AI tool
Perplexity AI
Perplexity AI is an AI answer engine that responds to natural-language questions with concise, source-cited answers built from a real-time web index.
Audience
Researchers
Pricing
Freemium
What Perplexity AI does
- Source-cited answers with inline links to the pages each claim is drawn from
- Real-time web search, so answers reflect current information rather than a frozen training cutoff
- Conversational threads that let you ask follow-up questions in context
- Spaces for organising threads, files, and shared research by topic
- Pro subscription unlocking advanced models, file uploads, and image generation
When to use Perplexity AI
- Researching an unfamiliar topic and getting a sourced overview in one query
- Fact-checking a claim by tracing it back to the original web pages
- Replacing the 'open ten tabs and skim' workflow with a single answer plus citations
Perplexity AI pricing
Perplexity AI is offered as a freemium product. Plans and exact prices change often — check the official Perplexity AI site for current tiers and limits.
Perplexity AI alternatives in Research
- SciSpace — AI research assistant for reading, searching, and summarizing papers.
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Where to find Perplexity AI
Browse more options like Perplexity AI across our curated AI tool lists and the Research category.
Frequently asked questions
Is Perplexity AI free?
Yes. Perplexity has a free tier that covers everyday questions. A paid Pro subscription adds advanced model access, file uploads, and image generation — see the Perplexity pricing page for current plans.
How is Perplexity different from ChatGPT?
Perplexity is built as an answer engine: every response cites the web pages it drew from, and its index refreshes in real time. ChatGPT can browse the web on request but is primarily a general-purpose conversational assistant.
Who should use Perplexity AI?
Researchers, students, journalists, and knowledge workers who need sourced, current answers fast — rather than long-form chat or hand-rolled Google searches.