ChatGPT, Perplexity, AI Overviews, Gemini: one GEO plan doesn't fit all four

The four big AI engines pull from different sources and reward different content — a 4-engine cheat-sheet plus the one prompt that shows which of them mentions you today, so you can pick one and act.

The four major AI answer engines do not read the web the same way: one favors encyclopedic writing, one leans on Reddit and video, one still runs on classic SEO, one is built on Google’s own ecosystem. This gives you a per-engine table and the prompt to find where you already show up.