Best AI Research Agents 2026: Perplexity vs Gemini Deep Research vs Elicit
Three very different approaches to AI-powered research. We tested all three on real research tasks.
Research Has Changed Forever
The research workflow that took a professional 4 hours in 2022 — web searches, reading articles, synthesising findings, writing a summary — now takes 15 minutes with the right agent. But the right agent depends heavily on the type of research.
Perplexity: Speed and Currency
Perplexity's strength is real-time information with citations. Ask about something that happened yesterday and get a cited, accurate answer in seconds. The Pro Search mode (available on paid plan) goes deeper — multiple search queries, synthesis across sources.
Best for: Current events, quick fact-checking, recent news synthesis, any research where recency matters.
Weakness: Depth. Perplexity is excellent at width (many sources) but less strong at the kind of deep analytical synthesis that complex research requires.
Gemini Deep Research: The Depth Agent
Google's Deep Research is categorically different. Give it a complex research brief — "analyse the competitive landscape in B2B SaaS customer success software" — and come back in 10 minutes to a 15-page report synthesised from dozens of sources.
It browses autonomously, decides which sources are relevant, extracts key information, and writes a structured report with its own analysis layer.
Best for: Deep research projects, competitive analysis, market research, literature reviews.
Weakness: Slower than Perplexity (by design), and the depth of analysis varies. Occasionally misses recent developments if they're not well-covered.
→ Gemini Deep Research profile
Elicit: Academic and Scientific Research
Elicit is built specifically for academic paper research. If you're doing literature reviews, scientific research, or any task where peer-reviewed sources matter, Elicit's ability to search 200M+ papers and extract structured data from them is unmatched.
Best for: Academic research, clinical literature reviews, scientific synthesis, policy research.
Weakness: Only covers academic papers. Poor for current events or commercial research.