ChatGPT

ChatGPT is OpenAI's consumer AI engine — the largest single AI surface, with hybrid retrieval-and-recall sourcing.

GPT-4GPT-5OpenAI Chat

ChatGPT (built on OpenAI's GPT-4, GPT-4o and successor models) is the dominant consumer AI surface, with hundreds of millions of weekly active users. ChatGPT answers from two paths: pure language-model recall (training data) and live browsing (the GPT browse tool, formerly „Browse with Bing"). Optimising for ChatGPT requires both entity-prevalence work — Wikipedia, structured directories, third-party mentions — and crawler accessibility for GPTBot and OAI-SearchBot.

Related terms

Generative Engine Optimization (GEO)

Generative Engine Optimization is the practice of getting your brand mentioned, cited and recommended inside AI-generated answers.

GPTBot

GPTBot is OpenAI's web crawler that gathers training and live-browsing data for ChatGPT.

Retrieval-Augmented Generation (RAG)

RAG is the architecture pattern where an AI engine fetches live web sources, then synthesises an answer from them.

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