How ChatGPT, Perplexity, Gemini, Claude & Grok decide what to cite (2026 data)
Per-engine breakdown of what drives citations — and the GEO tactics the data refutes.
Read GEO resources
Generative Engine Optimization (GEO): how AI engines cite brands
When buyers ask ChatGPT, Perplexity, Gemini, Claude or Grok for the best tool, the clearest answer, or who to trust, those engines pull from the live web — and each cites a different mix of sources. This is our evidence-grounded, regularly-dated guide to how that actually works, built from the same research that powers the S6S product.
Published June 17, 2026 Last updated June 17, 2026Data current as of June 2026
AI search changes fast — what these engines cite can shift in hours, not months. This page reflects research current as of June 2026 and is reviewed quarterly. Every statistic below is dated to its source so you can judge how current it is.
Key takeaways
- AI engines search the live web — what they cite changes in hours, not months.
- Only ~11% of cited domains overlap across engines, so per-engine optimization is the work.
- Your own website is typically only ~5–15% of your AI citations — the rest is earned media + third-party listings (Gemini leans most on owned domains).
- Most popular GEO 'fixes' (schema-for-citations, llms.txt) are not supported by the evidence.
Guides
How to get cited by ChatGPT: a 2026 playbook
The three layers behind ChatGPT's answers, and one move for each — plus the criteria it says it weighs.
ReadHow to get cited by Perplexity: a 2026 playbook
Perplexity cites on every answer — how it reranks its 3–4 sources, and how to make the shortlist (Reddit, freshness, answer-first).
ReadHow to get cited by Google Gemini: a 2026 playbook
Gemini is Google's index with an LLM on top — why ranking is the entry ticket, and why it's the one engine that rewards your owned domain.
ReadHow to get cited by Claude: a 2026 playbook
Claude is Brave-backed and depth-biased — it rewards research, named authors and deep articles, and under-cites mainstream media.
ReadHow to get cited by Grok: a 2026 playbook
Grok reads the live web and the X firehose — why presence on X and freshness matter more here than anywhere else.
ReadHow to measure AI visibility (2026): a practical framework
A practical framework for measuring whether AI engines mention and recommend you — per engine, observed kept apart from readiness.
ReadGEO for B2B SaaS: how to get your software recommended by AI (2026)
The archetype playbook: where B2B SaaS actually gets cited (listicles, directories, Reddit, comparisons) and how to win each engine's venues.
ReadChoosing a tool? See our buyer's guide to AI visibility tools. More guides are published and dated as they go live.
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