AI tools·Search & research·Global
Perplexity
Cited AI search. Built for research, comparison, and news—not closed-door writing.
Compiled through 2026-09
- Vendor
- Perplexity AI
- Started
- 2022
- China availability
- Overseas accessRequires overseas network access
- Pricing tier
- Free tier
- Current flagship
- Perplexity Pro / Deep Research
- Website
- www.perplexity.ai
Evaluation, Pros & Cons
Editorial score based on public benchmarks and community feedback — not a third-party benchmark result
Key Advantages
- Gold standard AI search engine; live web retrieval with precise cited references
- Pro Search & Deep Research multi-step reasoning with switchable frontier backends
Limitations & Caveats
- Subject to source site indexing and paywalled/anti-scraping limitations
Overview
Perplexity productized search + model summary + citations to fight uncited hallucination. Pro can switch GPT, Claude, Gemini, Grok. Sonar is the search-grounded API. 2025–2026 added deeper Research reports, shopping, and enterprise search. It competes with Gemini and ChatGPT Search as an answer engine, with a stronger citation habit.
Direction
The bet remains verifiable answers: better citations, research agents, browsing/shopping, and Sonar for developers. It will likely keep routing to other labs’ flagships rather than training the largest base model.
Version history
Jul 2026
LatestGPT-5.6 / Claude 5 routing
Pro picker tracks new flagships.
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New capabilities
- Pro picker tracks GPT-5.6 / Claude 5-class models
What got stronger
- The search product can summarize with each lab’s newest flagship immediately
Version notes
The July 2026 picker update is the strategy: someone else’s model, Perplexity’s UX. Swapping models is routine; citations and Research are the moat.
Feb 2025
Deep Research
Multi-step research reports.
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New capabilities
- Deep Research multi-step reports
What got stronger
- Can split a question, read many pages, and write a sectioned report
Version notes
Deep Research pulled Perplexity from Q&A into “do an hour of research for me.” You still spot-check citations; the shape is an agent.
Mar 2024
Sonar API
Search-grounded API for developers.
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New capabilities
- Sonar search-grounded API
What got stronger
- Builders could embed cited answers in their own products
Version notes
Sonar is Perplexity for developers: not the chat UI, a retrieval-grounded generation API. Fits as the retrieval layer of an internal assistant.
Nov 2023
Perplexity Pro
Paid tier and better models.
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New capabilities
- Pro: paid tier, better models, higher limits
What got stronger
- Heavy research could be daily, not rationed
Version notes
Pro funded better underlying models. The product difference stayed citations and search, not training the largest base model.
Dec 2022
Perplexity launch
Conversational search with cites.
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New capabilities
- Conversational search with clickable citations
What got stronger
- Answers link back to pages—less unsourced invention than plain chat
Version notes
Perplexity launched with citations as the anti-hallucination feature. The model was ordinary; the shape was right: a search engine, not a novelist.