Amazon vs Costco
Amazon leads Costco by 3.0 points on the Fameproof index, and wins 2 of the three models. Measured across 48 prompts per model per week.
Amazon
E-commerce
85.0/100
Rank 6 on the companies board
Costco
Retail
82.0/100
Rank 10 on the companies board
Amazon
Per-model score
Costco
—
Claude
—
88.0
ChatGPT
83.0
82.0
Gemini
81.0
30-day movement
−1.5
Change
+0.5
Last 7 runs
Answer quality
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Claude mention rate
undefined%
92%
ChatGPT mention rate
92%
83%
Gemini mention rate
88%
undefined%
Claude prominence
undefined%
83%
ChatGPT prominence
63%
77%
Gemini prominence
64%
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.
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