Learn · AEO, measured

AEO vs SEO: what is different, and where GEO fits

ClawWorld · measured September to October 2026 · published October 2026

SEO gets your pages ranked in search results; AEO, answer engine optimization, gets your company named and cited in the answer an AI writes. GEO, generative engine optimization, is a second name for the same work. The two share a floor, because an engine with web search can only cite a page that a search index already holds. Above that floor they come apart: Google indexes our site and Copilot cites it, and Claude and GPT-6 Sol still named us in 0 of 160 answers to our category’s buyer questions in the week to October 18, 2026. Do the crawling and indexing work first, then measure AEO on its own, since neither one’s report tells you about the other.

What does AEO stand for, and is GEO something else?

AEO stands for answer engine optimization; GEO, generative engine optimization, is a newer name for the same goal. Answer engines are the products that reply with a written answer instead of a list of links: ChatGPT, Claude, Perplexity, Gemini, Microsoft Copilot, and Google’s AI Overviews and AI Mode. AEO was in use before chat assistants, for featured snippets and voice answers. GEO comes from a research paper, GEO: Generative Engine Optimization, first posted to arXiv on November 16, 2023. You will also see LLM SEO, AI search optimization and AI visibility. Some agencies draw lines between the terms, but the work and the way it is measured are the same, so this page says AEO for all of them.

What does each one try to win, and how do you read the result?

SEO is read from search consoles in positions and clicks; AEO is read by asking engines the same questions repeatedly and counting. The row that matters most in practice is the last one. A ranking moves slowly and a console reports it for you, while the same question put to the same engine twice can name different companies, so one answer proves very little. We ask each question five times per engine and keep control brands we do nothing for; the rules are on our methodology page.

Where do AEO and SEO overlap?

They overlap at retrieval: an engine with web search answers from pages a search index already holds, so crawling and indexing come first. Google says so plainly. Its page on AI features says “There are no additional requirements to appear in AI Overviews or AI Mode, nor other special optimizations necessary,” and its guide to generative AI search calls that work “still SEO.” OpenAI’s crawler documentation says sites that block its search crawler, OAI-SearchBot, “will not be shown in ChatGPT search answers.” Outside Google the index matters just as much. Copilot answers from Bing’s index, and on six queries we checked by hand on October 13, 2026, 45 of the 54 results Claude’s search returned were in Brave Search’s top 20. A page missing from those indexes cannot be cited however good it is, and a page whose words only load through JavaScript is missing from what most AI crawlers read (see AI crawlers don’t run JavaScript).

What did two engines read when asked how AEO differs from SEO?

GPT-6 Sol read only pages published by Google, Bing and OpenAI; Claude mostly answered from memory and otherwise read marketing blogs. One of the 20 buyer questions we track asks how AEO differs from traditional SEO for a startup. Between September 28 and October 18, 2026, we put it to Claude Opus 5 and to GPT-6 Sol 14 times each with web search available: five times each on September 28 and October 12, and once a day from October 15 to 18.

GPT-6 Sol cited Google Search Central in all 14 answers, most often the generative AI guide quoted above, and Bing’s or OpenAI’s own pages in 12. Claude searched in 5 of its 14 answers and in none of the four daily runs. When it did search, it cited 41 pages on 27 sites, none of them published by a search engine or an AI company, and one marketing-software blog appeared in all five. The advice agreed more than the sources did: in most answers both engines told the startup to build on SEO rather than replace it. They parted on what comes next. Claude put third-party mentions on reviews, forums and roundup lists into every answer; GPT-6 Sol did once, and otherwise stayed close to the platform guidance it had just read.

So a definition question is the hard case for a young company. One engine reads only the platforms; the other often reads nothing. Companies get named on the shortlist and price questions, which we measured in what makes ChatGPT or Claude name a company in an answer?

Does ranking in search make a company show up in AI answers?

Not on our own site: search engines index and show our pages, and AI answers to our category’s questions still did not name us. On Bing, almost every impression and every Copilot citation went to our posts about AI news and AI agents, which nobody shopping for AEO searches for.

Other companies look the same. In 50 baseline reports on seed-stage B2B startups, 89 of 12,728 citations in AI answers about their categories went to the company’s own website; most of the rest went to vendor documentation, competitors’ comparison posts, code repositories and press (see is AI visibility worth paying for yet, or is SEO enough?). Being visible in search for the topics you write about is not being visible for the question your buyer asks.

What should a startup do first?

Do the SEO floor first, then measure AEO separately, because AEO results do not show up in SEO’s reports. Start by checking that your pages are in the indexes engines fetch from, Google, Bing, and Brave for Claude, that robots.txt lets in OAI-SearchBot, Claude-SearchBot and PerplexityBot, and that your words are in the raw HTML. Then write the first sentence under each heading as the answer, short enough to quote on its own; the mechanics are in how AI answer engines choose what to cite. Last, ask your category’s buyer questions yourself, five times per engine, and list the pages the answers cite. Getting onto those pages is most of the AEO work, and none of it shows up in a search console. Our sample baseline report is that check done in full, with the company’s name taken out.

What can these numbers not tell you?

They describe one question, two engines and one site over three weeks in 2026, so read them as examples, not as rates. The 28 answers about AEO and SEO come from a single question, and a differently worded one may send Claude to search more often. Both engines ran through developer tools, Claude Code and the Codex CLI, with web search on, which is not the same as the apps your buyers open. Our site is one site, it publishes mostly AI news, and we sell AEO, so it is a case, not a sample. Bing’s AI Performance report is a sample of Copilot’s citations and search consoles withhold rare queries, so a zero there means none reported, not none at all. Our numbers, round by round, are on the ClawWorld Lab.