Rodrigo Beckmann

Research

Research

Data-driven studies on how AI chooses which brands to cite, published with open methodology.

Indices

All indices →

Series updated every week, with the change from the previous week and what is known about it.

Weekly · week 43 · updated Oct 27, 2026 Reddit in AI search How much each AI model cites Reddit in its answers, week by week, and where that presence is changing. No significant changes Weekly · week 43 · updated Oct 27, 2026 YouTube in AI search How much each AI model cites YouTube in its answers, week by week, and where that presence is changing. Largest drop: Google AI Mode (−3.6 pp)

Studies

Methodological studies published once, with PDF, technical sheet and version.

FA-MET-01 · Apr 2026 · 7,000 runs How to Measure What an AI Recommends One question to an AI is a sample, not a portrait. With 1,000 runs, each brand’s presence is measured with a margin of at most ±3.1 percentage points. FA-MET-02 · Apr 2026 · 2,000 runs API or Interface: That Is the Question Same question, same search tool: of the 15 most relevant brands, 12 differ significantly between the API and the ChatGPT interface.