And do anchor urls matter in AI visibility?

Citations do not necessarily equate to brand mention, and even in the cases that it does, they do not necessarily equate to prominent mentions.
Perplexity returns to 62.4% of yesterday's cited URLs day after day. It also has the lowest brand primary rate of any active AI platform we measured (6.7%).
I wanted to know whether platforms that re-cite the same URLs every day also tend to re-recommend the same brands. In this study they do not appear to.
Perplexity sat alone at the top on URL re-cite rate, roughly 2x the next platform (Grok 33.6%, Google AI Overview 33.3%, Copilot 28.9%, ChatGPT 28.7%, Gemini 26.8%). URL stability and brand stability look like different things.
We then added four "URL anchor" features (a URL is anchored when an AI platform cited it yesterday for the same brand on the same prompts and cites it again today) to an ordinal regression on 3,115 day-pairs that predicts where a brand will land in the next day's response.
Three things fell out:
(1) Test accuracy improved from 47.5% to 54.5%, and the Perplexity platform coefficient collapsed from +0.53 to +0.02. Some of what looked like "platform personality" may actually be platform anchor rate. So by adding the platform anchor rate, it effectively absorbed some of the effect attributed to platform personality, hinting at some of the true faces of what I've been discussing the past 2 days.
(2) First-party anchored URLs (the brand's own pages re-cited by the AI day after day) predict roughly 3x faster promotion from secondary to primary in our data (26.3% vs 8.9%). For brands already at primary, first-party anchors barely move the needle. So anchors do not appear to hold position, but rather they appear to predict the upward move.
(3) The strongest single anchor coefficient is negative. When the AI is anchoring on many distinct domains in the same response, the response looks structurally enumerative rather than focused on any single brand.
The read on this data seems to tell you that total citation volume means that the AI is doing stable retrieval on a prompt. But there is still some layer where the AI is synthesizing the information, so it does not tell you which brand benefits. A key example is Perplexity. Although the information retrieval layer is more stable, the synthesis layer is less stable.
Read the full blog here:
https://trysill.com/blog/ai-citation-anchor-study
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