Perplexity: An AI Search Engine and Deep Research Tool

What is Perplexity

Perplexity is a powerful AI search engine and deep research tool. It answers quickly like a conventional search engine, but it also remembers the context of a conversation and supports continuous follow-up questions. The platform brings together several leading models — Claude Sonnet 4.5, GPT-5 and Gemini 2.5 Pro among them — so users can switch models per task. With Deep Research, custom source scoping and auto-generated knowledge outlines, it fits anyone who needs to gather, organize and analyze information efficiently, including students, researchers and professionals.

Key capabilities

• Intelligent search: Ask in natural language and get a synthesized answer with citations, plus conversation memory for follow-ups.
• Multi-model integration: Top models including Claude, GPT-5 and Gemini are available, and you pick the one that fits the task.
• Custom search scope: Limit sources to academic papers, investment reports and similar material when a domain needs to be precise.
• Deep Research: Runs several searches automatically, reads and analyzes large volumes of material and writes a consolidated report.
• Labs: An AI Agent that handles information gathering, data processing, code execution and chart generation end to end.
• Study mode: Built for learning and research, giving thorough structured answers, auto-generated knowledge outlines and interactive study support.
• Spaces: Upload files and links, research a specific topic, and keep dedicated memory for that conversation and its files.
• Daily customized digests: The Tasks feature collects and delivers topics you care about, such as financial news or weather forecasts.
• Finance features: Real-time market data, individual stock movements, index information and market analysis for investment research.

How to use it

1. Open the official Perplexity site at https://www.perplexity.ai/ and sign in.
2. Type your question in the search bar and read the answer together with its sources.
3. Keep asking follow-up questions; the context carries over.
4. Use the switcher next to the input box to choose the model for this session.
5. When you need boundaries, use the scope icon to pick sources such as academic papers or financial data.
6. For research topics, enable Deep Research and let the AI run multiple searches and produce a report.
7. Use Labs to have an AI Agent collect information, process data and deliver results.
8. Use Spaces to upload files and links for long-running analysis of a topic.
9. Set up Tasks to receive scheduled digests on the subjects you follow.

Use cases

• Academic research: Find and analyze scholarly papers quickly and explore a subject in depth.
• Market analysis: Pull real-time market data and analysis to support investment research.
• Education and learning: Use structured outlines and interactive tools to work through a new topic systematically.
• Development: Speed up coding with code generation and explanation.
• Everyday fact-checking: Get sourced, synthesized answers when a claim needs to be traced back.

Pricing

• Personal Pro: 20 USD per month, or 16.67 USD per year when billed annually; includes 10x more citations, Perplexity Labs, unlimited file and photo uploads, extended Research access, extended image generation, limited video generation, and subscription access to the latest models including GPT-5 and Claude Sonnet 4.
• Personal Max: 200 USD per month; everything in Pro, priority access to new products, unlimited Labs and Research, advanced models such as OpenAI o3-pro and Anthropic Claude Opus 4.1, enhanced video generation access and priority support.
• Education Pro: Free for verified students and teachers, with 10x more citations, Labs, unlimited file and photo uploads, extended Research access, the latest models and 5.00 USD of API credits.

Plans and benefits can change; always confirm on the official site.

Limitations and notes

• AI answers can be wrong; verify important conclusions against the original sources.
• Finance features provide market data and analysis, not investment advice.
• Available models, feature scope and quotas change with updates and follow what is shown in the product.
• Be careful with privacy and copyright when uploading files and links; avoid sensitive or protected material.

FAQ

How is Perplexity different from a regular search engine? Instead of only listing links, it returns a synthesized answer with citations, remembers the conversation context and supports follow-up questions.

Which AI models does Perplexity support? It integrates top models such as Claude Sonnet 4.5, GPT-5 and Gemini 2.5 Pro; you switch models next to the input box, and the exact list depends on what the app offers.

What does Deep Research do? It runs multiple searches automatically, reads and analyzes a large amount of material, and produces a consolidated report for topics that need real investigation.

Is Perplexity free? Reported plans include Personal Pro at 20 USD per month (16.67 USD per year billed annually), Personal Max at 200 USD per month, and a free Education Pro plan for verified students and teachers with 5.00 USD of API credits. Check the official site for current details.