Pfizer vs Merck
Pfizer leads Merck by 6.0 points on the Fameproof index, and wins 2 of the three models. Measured across 48 prompts per model per week.
Pfizer
Pharmaceuticals
86.5/100
Rank 29 on the companies board
Merck
Pharmaceuticals
80.5/100
Rank 46 on the companies board
Pfizer
Per-model score
Merck
—
Claude
—
91.0
ChatGPT
82.0
82.0
Gemini
79.0
30-day movement
+30.0
Change
+36.5
Last 7 runs
Answer quality
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Claude mention rate
undefined%
92%
ChatGPT mention rate
92%
85%
Gemini mention rate
88%
undefined%
Claude prominence
undefined%
91%
ChatGPT prominence
63%
72%
Gemini prominence
58%
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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