Glossary of AI Citation Terms

Definition: a measure of how invisible a market category is to AI engines — the share of companies in that category receiving zero AI citations, read alongside how concentrated citation events are among the top few players. A high score means most competitors in a category are structurally absent from AI engine answers, while a small handful capture nearly all the citation volume.

Latest reading — GEO/AEO category, 14 July 2026:

Zero-citation rate across 82 tracked GEO/AEO companies, updated monthly from Kaus AI's GEO Engine Monitor.

Citation concentration: the top 5 companies vs. the remaining 77 tracked companies.

Why the reading moved from the original snapshot: the Citation Gap Index was first published on 11 June 2026 using a 28-day window (14 May – 11 June) that scored 66% / 86%. Kaus AI's tracking pipeline has kept running since, and the reading above reflects the fuller dataset through 14 July 2026. Both readings are genuine — the index is a live measurement, not a fixed claim, and Kaus AI publishes the current number each time it refreshes rather than keeping the original figure static.

How it's measured: Kaus AI's GEO Engine Monitor queries ChatGPT, Perplexity, Gemini, and Claude daily with buyer-intent questions in a given category, logs every company mention, and computes (a) the share of tracked companies with zero mentions and (b) the share of citation events captured by the top 5 most-cited companies.

Full methodology and findings: see the GEO Visibility Gap Report, or the Complete Guide to AI Citation Building for what to do about a high score.