Share of Model: measuring visibility in AI answers
Share of Model is a metric that measures how often your brand appears in AI-generated answers for a given topic set, similar to Share of Voice for traditional search.
2026-06-19
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1 min read
Share of Model
Share of Model is a metric that measures how often your brand appears in AI-generated answers for a defined set of queries or topics. It is the AI-era equivalent of Share of Voice in traditional search, and the single most useful top-line number for an AI SEO program.
Where Share of Voice asks “do you rank in the top results?”, Share of Model asks “are you in the answer?”.
How Share of Model is calculated
- Define a topic set: 50–200 questions that a buyer in your category would actually ask
- For each question, query the major answer engines (ChatGPT, Perplexity, Google AI Overviews, Gemini, Claude)
- Count how many answers name your brand (mentioning counts; citing your URL counts more)
- Divide by total answers: that is your Share of Model for the topic set
Why it matters
- It is a leading indicator of AI referral traffic
- It correlates with brand awareness and consideration
- It is the only metric that captures the AI-discovery surface end-to-end
- It is shareable, comparable, and improves with consistent effort
How to grow Share of Model
- Earn more AI brand mentions. Every mention is a chance to be named in a future answer
- Build topical authority. AI engines prefer clusters of trusted sources
- Get cited. A URL citation is the strongest signal; aim for position zero and AI Overview citations
- Track competitors. Watch which brands win for which queries, and study why
- Optimize for passage-level retrievability. Make sure your best passages are easy for models to lift