Query Intent and Google Rank as Joint Predictors of AI Citation: A Multi-Platform Observational Study

Abstract

We test three industry claims about Generative Engine Optimization (GEO) — that Google rank determines AI visibility, that community platforms like Reddit confer citation advantages, and that AI recommendations are too inconsistent to optimize for — across ChatGPT, Claude, Perplexity, and Gemini. Our multi-study design combines query intent classification (n = 19,556 queries across 8 verticals), Google rank cross-referencing (120 API queries, 100 web UI queries against both Google and Bing), server-side fetch verification via Vercel middleware, and page-level analysis of 479 pages. Google rank dominates individual-page citation prediction: log(position) alone achieves cross-validated AUC = 0.802 (vs. 0.594 for page features, 0.462 for intent). A 94,599-event replication (Lee, 2026c) finds a monotonic citation gradient from 54% at Google position 1 to ≈2% at position 100, with every platform showing a 13–22× rate ratio between Top-3 and positions 31–100. Yet URL-level overlap with Google's literal-query Top-3 is weak (ChatGPT 7.8%, Perplexity 29.7%) and barely changes under Gemini-reformulated queries (7.8% / 35.4%) — domain-level overlap is much higher (28.7–49.6%), indicating AI platforms draw from Google's top-ranked domains but select different specific pages. All platforms align 4–7× more with Google than with Bing, even Bing-backed platforms. Reddit occupies 38.3% of Google Top-3 in our API sample yet receives zero API citations (binomial p = 3.43 × 10⁻²³), though web UIs cite Reddit at 8.9–15.6%. ChatGPT recommendations are highly consistent within-platform (Jaccard = 0.619, top-1 = 70%) but near-random across platforms (all-four Jaccard = 0.036). Server-side logging reveals a 2-vs-2 architectural split: ChatGPT and Claude perform live page fetches; Perplexity and Gemini rely exclusively on pre-built indices — with divergent robots.txt compliance. Effective GEO requires rank-aware, intent-aware, platform-specific optimization.

Keywords