Have you ever asked ChatGPT a question, watched it confidently rattle off an answer, and then wondered: where on earth did it get that from, and why wasn't it from your site?

If you sell anything online, that question matters more every month. People are starting their research inside ChatGPT, Claude and Perplexity instead of typing into Google and scrolling. When one of those tools answers a question and links a handful of sources, those links are the new page one. The frustrating part is that getting cited isn't one game - it's three. Each engine picks its sources in a noticeably different way. I'll break down how each one works, and what you can actually do about it.

What does "getting cited by AI" actually mean?

Getting cited by AI means an answer engine names your website as one of the sources behind its answer, usually as a clickable link or footnote. It's the AI-era version of ranking on page one - except instead of ten blue links, there are often only a handful of slots.

When you ask Perplexity or ChatGPT search something, it doesn't invent the answer from thin air. It runs a live search, reads a set of pages, and stitches together a response with citations pointing back to the pages it leaned on. Win one of those citations and you get visibility, referral traffic, and - just as importantly - the implied endorsement of being "the source the AI trusted".

How do ChatGPT, Claude and Perplexity choose their sources?

They choose sources differently because they're built differently. ChatGPT leans on what the broader internet has already aggregated about you, Perplexity favours high-authority specialist pages refreshed recently, and Claude is the most conservative, citing only when it has searched and found something solid.

Here's the honest version of each:

ChatGPT trusts the consumer internet's consensus about you - directories, Wikipedia, news, LinkedIn, and a long tail of editorial mentions. It tends to absorb a smaller number of sources but lean on them heavily.
Perplexity behaves more like a research assistant. It pulls in far more sources per answer and structurally favours recent, authoritative, specialist pages. According to a Q3 2025 analysis by Qwairy, Perplexity cited around 2.76 times more sources per question than ChatGPT (21.87 versus 7.92 on average).
Claude only cites when its web search surfaces something genuinely relevant, and it's careful about what it attaches its name to. Clean, well-structured, factual pages do best here.

The practical takeaway: a page that's perfect for one engine can be invisible on another.

Why citations barely overlap between engines

The overlap between AI engines is surprisingly small. One cross-platform audit from Authority Tech found only around 11% of cited domains appeared on both ChatGPT and Perplexity for the same queries.

Think about what that means. You could be the go-to source inside Perplexity and almost entirely absent from ChatGPT - or the other way round. There's no single "AEO score" that fixes everything. You're optimising for three judges with three different tastes, and you need a foundation strong enough to satisfy all of them, plus a few engine-specific moves on top.

How to get cited by ChatGPT

To get cited by ChatGPT, build up your presence on the sources it trusts: get mentioned on Wikipedia-adjacent reference pages, industry directories, reputable news, and high-traffic community sites. ChatGPT rewards brands the wider web already talks about.

The single biggest lever here is third-party mentions, not your own marketing pages. A study of 30 million citations reported by Search Engine Land found Reddit was the most-cited domain across AI engines, followed by YouTube and LinkedIn. So a genuinely helpful Reddit answer or a well-regarded roundup that names you can do more for your ChatGPT visibility than a dozen blog posts on your own domain. Be where the conversation already happens.

How to get cited by Perplexity

To get cited by Perplexity, publish authoritative, well-sourced pages and keep them fresh. Perplexity favours recent content from credible specialists, so a clearly dated, regularly updated page on a topic you genuinely know beats a stale one every time.

Because Perplexity cites so many sources per answer, the bar for entry is a little lower than ChatGPT - but the competition for each query is wider. Lead with facts, cite your own sources, use clear headings, and make sure your publish and updated dates are visible. If your page reads like a primary source rather than a sales pitch, you're in good shape.

How to get cited by Claude

To get cited by Claude, make your pages clean, factual and easy to parse: direct answers up top, clear structure underneath, and no fluff. Claude is selective, so clarity and trustworthiness matter more than volume.

In practice this means front-loading the answer. Open each section with one or two sentences that answer the question directly, then expand. That's good writing anyway, but it also happens to be exactly what every AI engine extracts most easily.

The foundations that work across every engine

While the engine-specific tactics are worth knowing, most of your effort should go into the foundations that earn citations everywhere. In my honest opinion, this is where the real wins are - the per-engine tweaks are the last 20%.

Get these right and you'll show up across all three:

The concise answer pattern. Start every section with a direct, self-contained answer in under 50 words. AI engines extract those opening sentences almost verbatim.
Structured data. Article and FAQPage schema help engines understand what your page is and pull the right snippets. It's not magic, but it removes ambiguity.
Genuine expertise and attribution. Named authors with real credentials, clear sourcing, and honest takes. AI engines lean towards content that looks accountable.
Freshness. Visible "last updated" dates and content you actually maintain. Perplexity in particular favours recency.
Depth, not isolated posts. A site with twenty interlinked articles on a topic beats a single page. Topical depth is one of the strongest citation signals there is.

If you want a proper checklist for this, we've packaged the full approach into a free answer engine optimisation guide (/resources/aeo-optimisation-guide) that walks through the content structure, schema, and entity signals step by step. It's the same framework behind everything above.

How to check if you're being cited

The simplest way to check is to ask the engines themselves. Run the questions your customers actually ask - "best tool for X", "how do I do Y" - through ChatGPT search, Perplexity and Claude, and see who gets cited. Do it monthly and track which engine names you and which doesn't.

It's manual, but it's honest, and it'll quickly show you where your gaps are. If Perplexity loves you and ChatGPT ignores you, you know to go and earn some third-party mentions. If nobody cites you, your foundations need work first.

Frequently asked questions

How many sources do ChatGPT and Perplexity cite per answer?

It varies by query, but Perplexity cites far more than ChatGPT. A Q3 2025 analysis found Perplexity averaged roughly 21.9 sources per response against ChatGPT's 7.9 - about 2.76 times as many. ChatGPT tends to lean more heavily on the fewer sources it does cite.

Do the same sources get cited across different AI engines?

Mostly no. A cross-platform audit found only around 11% of cited domains overlapped between ChatGPT and Perplexity. Being cited by one engine is no guarantee you'll be cited by another, which is why you need both strong foundations and engine-specific tactics.

How do I get my website cited by Perplexity?

Publish authoritative, well-sourced content and keep it fresh. Perplexity favours recent pages from credible specialists, so use clear headings, cite your sources, show visible publish and updated dates, and write like a primary source rather than a brochure.

Does schema markup help with AI citations?

Yes, indirectly. Schema like Article and FAQPage helps AI engines understand your content and extract the right snippets. It won't force a citation on its own, but it removes ambiguity and makes your page easier to quote, which improves your odds.

How can I check if AI engines are citing my site?

Ask them directly. Run the questions your audience actually searches through ChatGPT, Perplexity and Claude, and note which sources get cited. Repeat monthly to track progress and spot which engines you're missing.

The bottom line

Getting cited by AI isn't one challenge - it's three engines with three different tastes, sitting on top of one shared foundation. Nail the foundation (clear answers, structure, expertise, freshness, depth), then layer on the per-engine tactics: third-party mentions for ChatGPT, fresh authority for Perplexity, and clean clarity for Claude.

It's a moving target, and anyone who tells you they've completely cracked it is overselling. But the sites doing this well today are the ones that'll own the answers tomorrow.

If you want to see how your site stacks up for AI readiness, content quality and the rest, reach out for a free audit and I'll walk you through exactly what I find.