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- Query fan-out
- Google AI
- GEO
What is query fan-out, and why does it matter for AI search?
Query fan-out explained: how Google AI Mode, ChatGPT, Claude and Perplexity split one prompt into many searches, and what that means for your content.
AutoSEO Team
12 min read
In short
Query fan-out is the technique AI search engines use to split one prompt into several sub-queries, run those searches, and build a single answer from the combined results. Google names it explicitly for AI Mode and says AI Overviews may use it too, and OpenAI, Anthropic, Google's Gemini API and Perplexity document the same pattern of multiple searches per request. It matters because pages are retrieved for the sub-queries, not only for the prompt a user typed, so covering the subtopics an engine searches for is part of being citable.
- 01What is query fan-out?
- 02Which AI search engines use query fan-out?
- 03What do Google's patents say about fan-out, and what don't they prove?
- 04Why does query fan-out matter for your content?
- 05What are the limits of fan-out data?