Perplexity is the research beast, answering with live citations and zero hallucinations. 2025 Pro mode added “Spaces”—shared notebooks that auto-update when sources change. 300k-token context swallows entire codebases. New “Voice Answers” reads responses aloud with 11 emotional tones. Free: 10 Pro searches/day; $20/mo unlocks unlimited Copilot (chains 50 follow-ups) and GPT-4.5/Claude 3.7 back-ends. 720 million visits and 94% citation accuracy make it the darling of journalists and analysts. In blind tests it beats Google 68% of the time for fresh news. 720 million visits cement Perplexity as the truth engine of 2025.