Digital Authority Partners tracked 1,127 unique URLs cited by ChatGPT, Perplexity, Gemini, Copilot, and Google AI Overviews across 30 standardized queries. Six weeks later, they re-ran the same queries — and only 119 of those URLs were still being cited. That's a 10.5% retention rate. Nearly 90% of AI citations rotate out within six weeks.

The study also identified the strongest predictor of citation frequency: brand search volume, with a 0.334 correlation — higher than any other single variable tested, including domain authority, content freshness, or backlink count. Brands with high ambient search demand get cited more because AI systems use that demand as a proxy for trustworthiness. The implication is direct: earned media and brand awareness campaigns are not separate from GEO — they are GEO.

EnFuse's 2026 analysis quantifies the divergence between cited and non-cited brands as AI Overviews expand: brands earning citations inside AI Overviews see up to 35% CTR increases, while uncited organic results drop 34-61% on the same queries. 88.1% of AI Overview queries are informational — which defines where content investment should focus — and 60% of consumers now begin product research with AI assistants rather than search engines.

"The 10.5% citation retention rate from Digital Authority Partners is the most clarifying number I've seen this year. It means the AI citation landscape is almost completely refreshed every six weeks. If you ran a GEO audit in May and feel good about where you showed up, that data is already mostly irrelevant. But the finding that brand search volume has the highest correlation with citation frequency is actually good news for teams that don't know where to start - it means brand awareness work and AI visibility work reinforce each other. The brands with the strongest earned media footprints are not just getting more traditional visibility, they're being cited at higher rates in AI answers. GEO is not a separate strategy. It's the compounding return on every piece of PR, every thought leadership article, every customer success story you've ever published. The teams who get this are going to build durable visibility. The ones treating GEO as a website optimization checklist are going to keep chasing a set of citations that's already 90% gone."