ChatGPT
● liveQueried with web search on, so every answer cites live URLs.
Citation bias · Rewards crisp, well-structured pages it can quote in a single sentence.
Starter and up
Coverage · engines
Every engine, indexed independently.
The same question returns different answers — and different citations — on every AI engine. Geondex tracks each one on its own, so a win on ChatGPT never hides a blind spot on Perplexity.
Claude
● liveQueried with web search, pulling fresh sources into the reply.
Citation bias · Leans on freshness — recently updated content surfaces faster.
Pro
Perplexity
● liveAn answer engine — every reply ships with a numbered source list.
Citation bias · Favors high-authority, canonical pages over long-tail blog posts.
Free and up
Gemini
● liveQueried through Google's answer surface for grounded citations.
Citation bias · Mixes search authority with Google's own freshness signals.
Pro
Copilot
soonMicrosoft's answer engine, built on the Bing index.
Citation bias · A different retriever means a different citation set. On the roadmap.
Coming soon
Grok
soonxAI's assistant, wired to real-time signals from the X ecosystem.
Citation bias · Surfaces fast-moving sources others miss. On the roadmap.
Coming soon
Why it matters
Same query. Different answers.
Each engine retrieves with its own search provider, freshness window, and ranking heuristics, then weighs authority, freshness, and structure differently. A page that gets cited #1 on one engine can be invisible on another.
That's why Geondex never averages engines into one number. You see the per-engine breakdown — and exactly which content fix moves which engine.
Read the GEO field guide →authorityfreshnessstructure
Perplexity
Loves canonical sources
ChatGPT
Rewards crisp structure
Claude
Pulls fresh content harder
Cadence
Weekly on Free. Daily on Pro.
Citation rank drifts week to week as engines refresh their index. Free tracks Perplexity weekly; paid plans add engines and tighten cadence so you catch movement while it's still actionable. Compare on pricing.