Davis McCain
Variability of Google models: Gemini vs AIO vs AI Mode
Gemini, AI Overviews, and AI Mode share the same underlying infrastructure, but they don't behave like the same product. Across 15,155 brand configurations tracked daily in May 2026, brands saw a median 8-point visibility gap between their best and worst-performing Google model, driven not by how many brands each model mentions (they're nearly identical, 4.4 to 5.0 per response) but by which brands they choose to feature and which sources they cite to back them up. Gemini leans on editorial and reference sources like Reddit, YouTube, and Wikipedia, while AI Overviews and AI Mode cite far more heavily from social and UGC platforms, at roughly double Gemini's citation depth per run.