Mountain Dew vs Sierra Mist: AI Share of Voice Comparison
In the latest Famewise run (data as of 2026-08-17), Mountain Dew was named in 20 AI answers and Sierra Mist in 6, across ChatGPT, Claude and Gemini with web search on and off. Mountain Dew holds the larger share of voice. They are named together in 3 answers.
| Mountain Dew — answers naming it | 20 |
|---|---|
| Sierra Mist — answers naming it | 6 |
| Share of voice split | Mountain Dew 77% / Sierra Mist 23% |
| Answers naming both | 3 |
| AI models | OpenAI GPT, Anthropic Claude, Google Gemini |
Updated
Relative share of voice
Of the 26 mentions across the two brands, Mountain Dew takes 77% and Sierra Mist 23%. They are named together in 3 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 Mountain Dew or Sierra Mist more visible in AI answers?
In the latest Famewise run, Mountain Dew is named in 20 AI answers and Sierra Mist in 6. Mountain Dew has the higher share of voice. The two are named together in 3 answers.
How are Mountain Dew and Sierra Mist 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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