How ChatGPT, Claude, Perplexity, and Gemini Decide to Cite Your Site
How each engine selects sources (overview)
The exact algorithms are private, but public behavior reveals the big picture.
- Perplexity: searches the live web, then cites a few sources footnote-style per sentence. Clear, quotable sentences win.
- ChatGPT (search mode): browses the web and grounds answers in relevant, trustworthy pages. Brand and author trust signals matter.
- Gemini: tied to Google's index, so classic SEO signals weigh relatively heavily.
- Claude: when grounding via connected search or documents, prefers well-structured text with clear facts.
Shared traits of cited pages
- Answer-first structure: the title is the question, the first paragraph is the answer — easy to excerpt.
- Density of facts: numbers, definitions, and steps are explicit. Vague prose is not cited.
- Verifiability: sources, data, and update dates let AI cite with confidence.
- Technical access: crawlable, structured, fast to load.
A check you can run now
Open a key page and ask yourself: "If an AI quoted one sentence from this page, which would it be?" If that sentence doesn't clearly exist, creating it and placing it near the top is where GEO begins. To see your current state, run a free audit across all five engines.
Frequently Asked Questions
Which pages do AI systems cite?
Pages that answer the question directly in clear sentences, are structured so machines can parse them, and carry trust signals such as sources, author and dates.
Does citation work differently per engine?
Yes. Some engines combine live web retrieval while others lean more on trained knowledge, so they differ in how they select sources and how they display citations.
What is the fastest way to improve citation odds?
Put a one-sentence definition at the top of the page for each key question, then structure the supporting evidence as lists and tables.
Is your website being cited by AI?
Run a free audit