Costco vs McDonald's
Costco leads McDonald's by 83.0 points on the Fameproof index, and wins 2 of the three models. Measured across 96 prompts per model per week.
Questions about this comparison
Who do AI models mention more, Costco or McDonald's?
Costco. It scores 83.0 on the Fameproof index against 0.0 for McDonald's — a lead of 83.0 points, measured across ChatGPT and Gemini in the run of 5 August 2026.
How is the Costco vs McDonald's comparison measured?
Both are asked about with the same panel of category questions — never questions naming them — repeated on every model each week. The score combines how often each is named, how early in the answer, how much of the topic is covered and how consistent the result is.
Both are ranked on the Company AI Visibility board. Prominence reflects how early in an answer the model names them; mention rate is how often it names them at all. How the score is built.
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