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Documentation Index

Fetch the complete documentation index at: https://docs.getcited.in/llms.txt

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Answer engine is an AI platform that generates synthesized, conversational answers to user questions rather than returning a ranked list of links. ChatGPT, Perplexity, Gemini, Claude, and Grok are all answer engines. The term distinguishes these platforms from traditional search engines (Google, Bing) that return ranked link lists.

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Why it matters

The shift from search engines to answer engines is the underlying trend that makes GEO necessary as a distinct discipline. When a customer asks an answer engine for product recommendations, the AI synthesizes a response that names specific brands — no clicking through to 10 blue links, no evaluating multiple pages. The answer engine makes the initial brand selection on behalf of the customer. Brands not mentioned in the synthesized answer are excluded from the customer’s consideration set.

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How it applies in practice

Cited tracks five answer engines, each with different behavior patterns: Perplexity always cites sources explicitly, ChatGPT blends training data with Bing retrieval, Claude relies mostly on training data, Gemini draws from Google’s search index, and Grok integrates X social data. Understanding each answer engine’s behavior is key to GEO strategy. See Which LLMs we track for the specific models and rationale.
  • GEO — the optimization discipline for answer engines
  • SERP — the predecessor concept from traditional search engines
  • Which LLMs we track — the five answer engines Cited monitors