Merck
PharmaceuticalsFameproof index
73.7+1.9
Merck
Healthcare average
Claude 4.5
+2.1
74.4
Mention rate72%
Avg. position2.6
Factual accuracy93%
SentimentPositive
ChatGPT (GPT-5)
+1.9
73.8
Mention rate71%
Avg. position2.5
Factual accuracy93%
SentimentNeutral
Gemini 2.5
+1.6
72.9
Mention rate72%
Avg. position2.3
Factual accuracy91%
SentimentNeutral
Prompt performance
Position when mentioned · 1,200 promptsPrompt
CL
GPT
GEM
“Which pharma company has the strongest pipeline”
—
#2
#4
“Best vaccine manufacturer”
#3
#1
#4
“Who leads in oncology drugs”
#2
#2
#4
“Most reliable generic drug maker”
#3
#4
#1
“Which pharma firm prices most fairly”
#3
#1
#3
A 5-prompt sample of the 1,200-prompt weekly panel.
Who wins the prompts Merck loses
Most-cited sources
What the models lean on when they describe Merck.
docs.merck.comwikipedia.orgg2.comnews.ycombinator.comreddit.com/r/business
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