Gemini

Cross-analyzing four major studies from 2026: ChatGPT's share ranges from 63% to 92% depending on methodology. Gemini's share tripled in 12 months, overtaking Perplexity, while Claude grew 64x in 19 months.

GA4's AI Assistant channel: added to Default Channel Groups in May 2026, automatically classifies AI referral traffic, yet a structural blind spot remains: sessions that arrive without a referrer header. Here's what the channel captures, what it misses, and how to cover the gap.

A side-by-side comparison of the four major AI shopping recommendation platforms: ChatGPT, Perplexity, Gemini, and Google AI Mode, covering data sources, conversion rates, and optimization levers. One page to decide where to put your GEO budget first.

A 2026 comparison of the four major AI search engines: ChatGPT Search, Google Gemini, Anthropic Claude, and Perplexity AI, covering crawler infrastructure, index types, citation preferences, and engine-specific GEO strategies.

GPT-5 and Gemini 2.5 Pro raised the stakes for engine-specific GEO. Compare ChatGPT, Google AI, Perplexity, and Claude by information source, citation mechanism, and GEO lever: with tiered investment priority guidance for each engine.

Gemini is wired into Google Search and its ecosystem, while Claude cites its sources cautiously. A multi-engine look at each engine's crawler access, content structure, and trust signals.