Glossary
AI Engine
A general term for the AI assistants and answer products that synthesize responses from multiple sources: ChatGPT, Gemini, Claude, Perplexity, Grok, Google AI Overviews and Google AI Mode.
Definition
An AI engine is any user-facing product that uses a large language model to answer questions, often combining the model's training with real-time web search. AI engines have become a primary discovery channel: people ask them for product recommendations, definitions, comparisons, and how-tos. From a marketing perspective, the engine is what your brand needs to appear in.
Example
When DiscoveredBy says "tracked across 8 AI engines," it means Gemini API, Perplexity, Grok and Claude, each measured through its official API, plus Google AI Overviews, Google AI Mode, ChatGPT and Gemini, measured through a licensed data provider that fetches Google’s own results and the answers chatgpt.com and gemini.google.com show.
Related terms
Answer Engine
A search product that returns a direct synthesized answer instead of a list of links: Perplexity, ChatGPT Search, Google AI Overviews.
Generative Engine
An AI system that generates answers (rather than retrieving them), typically powered by an LLM.
Large Language Model (LLM)
The underlying AI model that powers AI engines: examples include GPT-5.6, Gemini 3.8, Claude Sonnet 5.5, and Grok 4.7.
AI Mode
Google's conversational AI search mode, which answers a query with a generated response and linked sources instead of a results page.
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