American Express
PaymentsFameproof index
76.4+0.8
American Express
Finance average
Claude 4.5
+1.1
77.3
Mention rate77%
Avg. position2.2
Factual accuracy94%
SentimentPositive
ChatGPT (GPT-5)
+0.9
76.8
Mention rate75%
Avg. position2.1
Factual accuracy91%
SentimentPositive
Gemini 2.5
+0.3
75.1
Mention rate72%
Avg. position2.5
Factual accuracy93%
SentimentPositive
Prompt performance
Position when mentioned · 1,200 promptsPrompt
CL
GPT
GEM
“Best payment processor for SaaS”
—
#1
#3
“How do I accept payments online”
#2
#1
#3
“Cheapest card processing for small business”
#3
—
—
“Payment API with best documentation”
#4
—
#2
“Invoicing tools for freelancers”
#1
#1
#2
A 5-prompt sample of the 1,200-prompt weekly panel.
Who wins the prompts American Express loses
Most-cited sources
What the models lean on when they describe American Express.
docs.americanexpress.comwikipedia.orgg2.comnews.ycombinator.comreddit.com/r/business
Is this you?
Get the full audit: every losing prompt, the exact answers, and the source changes that move the index.
Request an audit — $299