Anthropic
Anthropic is the AI company that builds and operates Claude, the assistant whose answers this site measures. Where a figure on this site is described as a Claude number, Anthropic’s assistant produced the answers it was computed from.
Claude in this site’s measurements
Claude is the assistant this site has probed at scale. In September 2026, one buyer question per business was put to Claude with web retrieval on for 9,240 small businesses; 14.9% of them were named, and 17.7% among the 5,928 answers that gave a clearly differentiated list. Those are Claude numbers, from one question each on one day, and they are not presented here as rates for ChatGPT, Gemini or Perplexity, which run their own retrieval and write their own answers. The probe is described in what 9,483 small business websites serve to an AI crawler. For the mechanism by which a source becomes visible in a generated answer at all, Aggarwal et al., “GEO: Generative Engine Optimization” (KDD 2024), is the controlled study.
One maker, one assistant, one set of rules
Each assistant belongs to one company, and that company decides how its assistant fetches pages, which crawler tokens it announces, whether robots.txt is honored on a person’s request, and how sources are shown. So a business is not visible to “AI” in general; it is visible, or not, to Anthropic’s assistant, to OpenAI’s, to Google’s and to Perplexity’s, each measured separately. Anthropic publishes its own crawler and product documentation; this entry does not summarize it, because the site’s citation policy limits vendor facts to a fixed set of documentation hosts and the current Anthropic pages sit outside it.
A common question
Do the Claude figures on this site describe how ChatGPT or Gemini would answer?
No. Each assistant belongs to one company, and that company decides how pages are fetched, which crawler tokens are announced, whether robots.txt is honored when a person asks, and how sources are shown. The probe behind the 14.9% figure put one buyer question per business to Claude with web retrieval on a single day, which makes it a Claude number and nothing wider. A business is not visible to AI in general; it is visible, or not, to each maker's assistant, and each one has to be measured separately.
Related terms
Sources
The probe figures are this site’s own, computed from its audit records; one assistant (Claude, with retrieval), one question per business, sample drawn per metro and trade. Mechanism: Aggarwal et al., “GEO: Generative Engine Optimization” (KDD 2024).