# Share of Model

> A metric for how often a brand appears in AI-generated answers across prompts, relative to competitors — the AI-era analogue of share of voice.

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- **term:** Share of Model
- **category:** optimization
- **short_def:** A metric for how often a brand appears in AI-generated answers across prompts, relative to competitors — the AI-era analogue of share of voice.
- **long_def:** Share of model (closely related to 'AI share of voice') measures a brand's slice of the AI conversation: if models mention brands 100 times across tracked prompts and a brand accounts for 25, its share is 25%. It is the headline output of GEO/AEO measurement tools (Profound, Ahrefs Brand Radar, Semrush) and reframes visibility from rankings to presence inside model answers.
- **see_also:** geo, aeo, zero-click
- **etymology_origin:** — (verify-against-primary-at-build)
- **related_to:** geo, aeo, zero-click, llmo
- **contrast_with:** Unlike a search ranking, which measures position in a list of links, share of model measures the percentage of AI answers in a category that mention your brand — presence inside the answer, not order on a page.
- **example:** If AI models mention brands 100 times across tracked prompts and a given brand accounts for 25 of those mentions, its share of model is 25%.
- **source:** https://www.tryprofound.com/resources/articles/what-is-answer-engine-optimization
- **status:** emerging
- **why_it_matters:** Share of model is the KPI that makes GEO accountable; it lets a brand measure whether agent-readiness and citation work are actually increasing its presence in AI answers.
- **sameAs:** —
- **bridge_entity:** geo
- **last_verified:** 2026-06-15
- **md_twin:** /glossary/share-of-model.md