Detailed Definition
In AI model answers, being listed first or second carries vastly higher user attention and click-through rates than being listed at the end of a 10-item list. Prominence Credit mathematically weights list position to reward top-tier placement.
Formula / Calculation Standard
Position Weight = max(0, 1 - (List Index - 1) × 0.08)Why It Matters for Brands
Ensures that a brand ranking #1 in AI responses receives significantly higher visibility credit than a brand buried at the bottom of the answer.
How Fameproof Measures It
Fameproof parses structured model lists, extracting position indices and applying non-linear positional decay factors.
Read Full Evaluation Methodology →Example Entities Measured with this Metric
Related Terms
LLM Share of Voice (SoV)The percentage of AI-generated responses within a category that explicitly cite or recommend a specific brand compared to competitors.Unaided Prompt Mention RateThe frequency with which an AI model organically mentions an entity when asked neutral, category-level questions without referencing the entity by name.AI Visibility ScoreA composite 0–100 score measuring an entity's mention frequency, ordinal prominence, category coverage, and repetition stability across AI models.
Related Research Articles
State of AI Brand Visibility 2026: Benchmark Data Across Apple, Microsoft, Google, and TeslaWe analyzed benchmark visibility data across top global technology brands. Explore why Apple and Microsoft rank highest in unaided AI responses, and how prompt packs affect score stability.Why ChatGPT, Claude, and Gemini Recommend Different Brands (And How to Audit Them)Why does ChatGPT list OpenAI and Apple first while Claude emphasizes Anthropic partners or open-source leaders? Learn the architectural and pre-training reasons behind model variance.