Perplexity

What Perplexity does

Perplexity answers questions by searching the web and writing a summary with inline citations, so every statement can be traced to a page. Beyond single answers it offers a research mode that runs many searches and produces a longer report, spaces for grouping related work with uploaded files, focus modes that restrict searching to academic papers or specific source types, and a browser with the assistant built in. Several underlying models can be selected on paid plans. It suits anyone who needs current information with references: analysts, journalists, buyers researching decisions and students checking claims. The limitations are source quality and summarisation: it cites whatever ranks, which includes low-quality pages, summaries occasionally misrepresent a nuanced source, and following the citations remains necessary for anything consequential rather than trusting the written answer.

How to use it

Use perplexity.ai without an account for basic answers; signing up adds history and spaces, and a paid plan raises limits, unlocks stronger models and enables longer research runs. Ask a specific question rather than a keyword, because the tool searches based on your phrasing. Then do the part most people skip: open the citations. The summary is a guide to the sources, not a replacement for them. Use the academic focus when you need papers rather than blog posts, and set up a space for an ongoing project so uploaded documents and previous threads stay together. Research mode takes several minutes and produces a structured report with a long source list, which is worth it for a decision and overkill for a quick question. Two practical notes: follow-up questions inherit the earlier context, so start a new thread when the subject changes, and financial or medical answers need verification against primary sources.

Best for

• sourced answers
• current information
• competitive research
• fact checking
• literature starting points

Strengths and limitations