ChatGPT Reads Training Data. Perplexity Reads the Live Web. Your Strategy Needs Both.
ChatGPT, Perplexity, and Gemini share zero cited sources on 35 to 40 percent of queries. That is not a rounding error or an edge case. Machine Relations analyzed 5.5 million LLM responses across the three major AI search engines and found that on more than a third of questions, there is literally no overlap in which websites get recommended. If your GEO strategy optimizes for one platform, you are invisible on the other two at least a third of the time. ...