Generative engine
Also called: generative search engine, answer engine, AI search engine
Definition
A generative search engine, or answer engine, is a tool that answers a question by writing text, produced by a language model from its own knowledge and from pages found on the web. It often cites its sources as links, but the user gets the answer without having to open them.
ChatGPT with web search, Perplexity, Google AI Mode, AI Overviews, Copilot or Gemini all work this way, with big differences: how many sources they read, which sites they favor, how long their answers are. A brand that is very visible on one can be missing from another.
Example
Asked “which online bank for a freelancer?”, a generative engine writes a paragraph that compares three offers and cites four sources, where Google used to show ten links to open one by one.
What it means for your AI visibility
Each engine has its own way of choosing sources and brands. According to the Semrush AI Visibility Index 2026, less than half of citations overlap from one engine to another. So you need to track your visibility engine by engine, not with one global number.
Related terms
- ChatGPT SearchChatGPT Search is ChatGPT's web search feature: it reads pages when it answers and cites its sources.
- PerplexityPerplexity is an AI answer engine that searches the web for every question and always cites its sources.
- Google AI ModeAI Mode is Google's conversational search mode: an answer written by Gemini, with follow-ups, instead of the results page.
- RAGRAG lets an AI look for documents before answering, then write its answer from what it found.
- Conversational searchConversational search replaces keywords with full questions, put to an AI in natural language, with follow-ups.
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