Diet Coke vs Pepsi: AI Share of Voice Comparison
In the latest Famewise run (data as of 2026-11-09), Diet Coke was named in 8 AI answers and Pepsi in 48, across ChatGPT, Claude and Gemini with web search on and off. Pepsi holds the larger share of voice. They are named together in 5 answers.
| Diet Coke — answers naming it | 8 |
|---|---|
| Pepsi — answers naming it | 48 |
| Share of voice split | Diet Coke 14% / Pepsi 86% |
| Answers naming both | 5 |
| AI models | OpenAI GPT, Anthropic Claude, Google Gemini |
Updated
Relative share of voice
Of the 56 mentions across the two brands, Diet Coke takes 14% and Pepsi 86%. They are named together in 5 answers.
How this is measured
Famewise generates the category-level questions consumers ask AI assistants, then asks them to current OpenAI GPT, Anthropic Claude and Google Gemini models — each question with web search on and off. An extraction model records every brand named in every answer, the position of its first mention, and the sentiment toward it. Brands are ranked by visibility: the share of this category's answers that name them at least once. Share of mentions is a different cut of the same data — each brand's slice of every brand mention in the category. Every number reflects the latest scheduled run.
Read the full methodology — sample sizes, formulas and refresh frequency →
Frequently asked questions
Is Diet Coke or Pepsi more visible in AI answers?
In the latest Famewise run, Diet Coke is named in 8 AI answers and Pepsi in 48. Pepsi has the higher share of voice. The two are named together in 5 answers.
How are Diet Coke and Pepsi measured?
Famewise asks current OpenAI GPT, Anthropic Claude and Google Gemini models the questions consumers ask in these brands' categories — with and without web search — and records every brand each answer names, its position, and the sentiment toward it.
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