Last updated: 2026-07-01
Perplexity AI returns citation-backed web search answers, live since 2022, coordinating AI models per query. Comet browser included free on all platforms.
Perplexity AI is an AI answer engine that searches the live web for every query, not a chatbot: it pairs results with numbered source citations and now drives over $450 million in yearly recurring revenue. Deep Research extends that layer into harder, multi-page questions. Live retrieval is what separates it from tools drawing only on a static training snapshot.
Perplexity AI is an AI-powered answer engine built by Perplexity AI, Inc. (founded August 2022), designed to search the live web and return structured, cited answers in seconds. As of early 2026, it serves 45 million monthly users and processes over 1 billion queries per month, generating $450 million in annualized recurring revenue. Unlike static chatbots that rely on frozen training data, Perplexity retrieves real-time information from indexed web pages and pairs each answer with numbered source links, making it the primary tool for research that requires verifiability. The platform runs a multi-model architecture coordinating up to 19 distinct AI models, anchored by its proprietary Sonar engine, itself built on top of Llama 3.3 70B with extra fine-tuning for search relevance and factual accuracy. That Cerebras-hosted inference keeps answers near-instant even under complex queries. For deeper research tasks, Pro and Max users get Deep Research mode, which crawls a large batch of web sources per query, checks them against each other for contradictions, and turns the results into a multi-section report with full citations in 2 to 5 minutes, using Claude Opus 4.5 and 4.6 to reason over the material. In 2026, Perplexity expanded from an answer engine into a full agentic platform. Perplexity Computer, launched February 25, 2026, is an autonomous AI agent that executes multi-step workflows by browsing the web, operating software, filling forms, and spawning sub-agents for parallel tasks. Model Council, launched February 5, 2026, runs a single query across three AI models simultaneously so users can compare outputs side by side. The Comet browser embeds Perplexity search into an AI-native browser with granular privacy controls and autonomous task execution for actions like booking flights and managing email. The platform runs on web, iOS, Android, and macOS, with the Comet browser extending the same search and agent capabilities directly into everyday browsing. Pricing scales from a permanent free tier up to Enterprise Max, detailed below. Perplexity's clearest advantage over ChatGPT is citation accuracy: in head-to-head tests, Perplexity returns more verifiable sources with fewer hallucinated URLs. Its main weakness is creative tasks and deep code debugging, where ChatGPT and Claude remain stronger. Backed by $1.72 billion across 11 funding rounds from Jeff Bezos, Nvidia, and Databricks, Perplexity reached a $22.6 billion valuation by January 2026.




Free tier with unlimited basic searches and 5 Pro Searches/day. Pro at $20/month (or $200/year). Max at $200/month (or $2,000/year). Education Pro at $10/month for verified students. Enterprise Pro at $40/user/month; Enterprise Max at $325/user/month. Sonar API starts at $1/million input tokens and $1/million output tokens.
| Feature | Max | Pro | Free | Enterprise Max | Enterprise Pro |
|---|---|---|---|---|---|
| Live web search | ✓ | ✓ | ✓ | ✓ | ✓ |
| Deep Research mode | ✓ | ✓ | — | ✓ | ✓ |
| Model Council | ✓ | ✓ | — | ✓ | ✓ |
| Assistant Builder | ✓ | ✓ | — | ✓ | ✓ |
| Perplexity Computer (agents) | ✓ | Limited | — | ✓ | ✓ |
| Queries per day | Unlimited | 600 | 5 | Unlimited | 1,800 |
| Priority inference | High | Standard | — | High | Standard |
| File uploads | ✓ | ✓ | — | ✓ | ✓ |
Perplexity has five tiers: a free tier with limited daily searches, Pro at $20/month, and Max at $200/month for the highest limits plus Perplexity Computer access. Enterprise Pro runs $40/user/month and Enterprise Max $325/user/month, both with SSO and zero-training guarantees. The Sonar API starts at $1 per million tokens for developers building their own search-grounded apps.
Yes. The free tier includes unlimited Quick Search and 5 Pro Searches a day, both returning citation-backed answers from live web sources. Free, Pro, and Max users are opted into 30-day data retention by default, with an opt-out toggle in Account Settings. Deep Research, Model Council, and Perplexity Computer all require a paid plan.
The closest alternatives are ChatGPT and Claude. Choose ChatGPT for general-purpose conversation and stronger coding help, or Claude for longer, more careful reasoning and writing. Pick Perplexity instead when the priority is a sourced, verifiable answer rather than a generated one.
ChatGPT's GPT-5.5 scores 88.7% on SWE-bench Verified, well ahead of where Perplexity performs on coding, debugging, and complex math. Perplexity flips the advantage on sourcing: every answer attaches numbered citations back to live web pages, something ChatGPT's default mode does not do. Choose ChatGPT for writing and code; choose Perplexity when the answer needs to be verifiable.
Getting started needs no signup: go to perplexity.ai or open the free Comet browser and type a question to get a cited answer immediately. Creating a free account saves search history and raises the daily Pro Search limit. Upgrading to Pro adds Deep Research and Model Council for deeper, multi-source reports.
Perplexity AI searches the live web and returns cited, source-backed answers, used by 45 million monthly users with plans starting free.
Perplexity AI, Inc. · Free tier available