deep research
Also called: AI deep research, deep research mode, deep research agent
Deep research is an AI agent mode (in ChatGPT, Gemini, and Perplexity) that plans a multi-step investigation, browses and reads many web sources on its own, then returns a long, cited report. It trades speed for depth, usually taking minutes rather than seconds.
Deep research became a standard feature across the major assistants in 2025. Google announced Gemini Deep Research on December 11, 2024, and OpenAI launched deep research in ChatGPT in early 2025, with Perplexity and Anthropic shipping comparable modes soon after. By 2026 it is a normal tier of these tools, not an experiment.
How the loop actually runs
The pattern is consistent across vendors. Google describes it as Plan -> Search -> Read -> Iterate -> Output. You ask a question, the agent drafts a research plan (often shown for you to approve), then runs many searches, opens and reads the pages, and starts new searches based on what it just learned. When it decides it has enough, it writes a structured report with inline citations back to the sources it used.
Example: ask “compare the top project-management tools for a 20-person agency” and instead of one paragraph you get a multi-page brief with a comparison table, pricing, and a link next to each claim.
Two things matter for anyone doing SEO. First, these agents read full pages, not just snippets, so the actual substance of a page decides whether it gets used. Second, every claim carries a visible citation, which means being one of the named sources in the report is the win condition, the same way ranking is the win condition in classic search. Optimizing for that is a different job from chasing a blue link.
How it affects your traffic
When a prospect runs deep research on "best [your category] provider," the agent reads a stack of pages and cites only a handful in its report. If your site is not among them, you are invisible at the exact moment someone is comparing options, and there is no results page for them to scroll. Getting named depends on the signals these agents reward: answer-first content, a clear entity footprint, and third-party mentions across the web. Our AI SEO service is built to make your pages the ones these research agents retrieve and quote.
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