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Methodology2026-06-295 min read

One Engine Is an Opinion. Nine Engines Are a Market.

ChatGPT, Gemini, Perplexity, Claude, Grok, Google AI Overviews and the new grounded engines do not agree with each other. Checking one and calling it "AI visibility" mistakes a single opinion for the market.

The engines genuinely disagree

Run the same buyer question across engines and you will see it immediately: one recommends you, another names three competitors, a third describes the category without naming anyone. This is not noise — each engine retrieves from different sources, weights them differently, and answers with a different disposition.

That disagreement is information. An engine that never names you while the others do is telling you which sources it trusts — and that you are absent from them.

Engine bias is a real, measurable thing

Some engines lean on Reddit, some on listicles, some on vendor docs. Some over-recommend incumbents; the newer grounded engines follow live web search and swing with whatever ranks today. If your buyers are asking Perplexity and you only ever check ChatGPT, your mental model of "what AI says about us" is simply wrong.

  • Sample every engine your buyers actually use, not the one you personally like.
  • Compare per-engine answers on the same prompt to spot which sources each trusts.
  • Treat an engine that flips its answer as a signal to check what changed in its sources.

Coverage plus replication, or it is theater

Breadth without replication is just more screenshots. The method that holds up is both: many engines, sampled daily, aggregated over the week — so a brand that appears in one engine once does not get confused with a brand the market actually recommends.

That is the standard we hold our own report to: nine engines today, each answer stored verbatim, every claim in the report traceable to a sampled run.

See it on your own brand

What is AI telling your buyers right now?

Builder radar samples 9 grounded AI engines with your buyers' real questions, stores every answer verbatim, and alerts you when an answer changes — with the receipt.

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