GEO Maintenance: Is It One and Done? AI Citations Have an 11-Day Half-Life

TL;DR: No. In September 2026 the AI search tracking company Profound published a study that followed 883,000 pages across 7 AI engines for a full year. Once a page hit its peak share of AI citations, it took a median of just 11 days for that share to drop by half, and 78% of pages lost half within two weeks. A well-maintained SEO↗ article can hold its ranking for years. GEO runs on a weekly clock, so if you ship and walk away, AI engines may forget you within a couple of weeks. Treat GEO as monthly maintenance, not a one-off project.

How the study arrived at 11 days

The half-life of an AI citation is the number of days it takes for a page's share of AI citations to fall to half of its peak.

Profound's study↗ came out on September 30, 2026. It covers data from September 8, 2025 to September 8, 2026 across ChatGPT, Perplexity, Claude, Google AI Overviews, Google AI Mode, Gemini and Microsoft Copilot. The headline numbers:

Two things matter when you read this figure. First, the 11 days start at the peak, not at the publish date. Second, Profound measured it with metrics from its own platform. The method is described in the methodology section of the original post, so cite the source whenever you quote the number.

Other studies report longer numbers, but all of them count in weeks

Different teams using different methods land anywhere from 11 days to 5 weeks, and every one of them measures citation life in weeks. None found a lifespan measured in years.

Foundation Lab, summarizing Writesonic's data↗, describes 23 million cited sources tracked from April to June 2026. Citations that kept showing up had a median life of 11 to 15 days, and 44% of cited pages appeared once and then vanished. Another estimate puts the figure at 4 to 5 weeks. The gaps mostly come down to where the clock starts and whether the study measures pages, brands or sources.

Whichever number you pick, the takeaway holds. Traditional SEO can plan refreshes by the quarter or the year. GEO needs a monthly cadence at minimum.

What our own weekly tracking shows

We measure our own brand every week against the same 20-question bank, and the numbers move every single week. Nothing stays fixed after one round of work.

Here is our GEO report for the week of October 18, 2026:

• The share of Google AI Overviews citing our pages went from 16/50 the previous week to 23/50.
• AI referral visits from ChatGPT fell from 17 to 11. Visits from Gemini rose from 2 to 9.
• Ask the same question three times and the AI often recommends a different list of providers.

All of this happened while we changed only one thing per week. Pages we did not touch at all still moved up and down as AI retrieval shifted and other sites published updates. If you are new to the discipline, our explainer on what GEO is and how it differs from SEO covers the basics behind these measurements.

Why AI citations decay so fast

AI citations fade quickly mainly because AI engines run a fresh retrieval for every answer, and competitors publish new content every day.

Rankings in classic search compound. Once a page builds up links and clicks, it is hard to dislodge. Source selection in an AI answer works more like a live contest, where every response picks from whatever the engine can find at that moment. If your page sits untouched while someone else publishes a piece with a newer date and more specific numbers, the AI may switch to citing them. Profound also found almost no correlation in citations between engines. Being cited by ChatGPT says nothing about Perplexity, so each engine needs its own attention.

Google's official guidance on AI features and your website↗ states that AI Overviews rely on the same quality and ranking systems as regular search, with no extra technical requirements. So the focus of maintenance is not technical setup. It is keeping your content the most current and most complete answer available.

How to tell a page is being forgotten by AI

There are three signals that AI is forgetting a page: falling AI referral traffic, AI answers that stop naming you, and fewer impressions on AI-style long queries in search consoles.

These are the three we check every week:

Read the three together. Any single one can mislead you. A dip in GA4 AI traffic might just mean fewer people asked that week, not that you were replaced. When your naming rate and long-query impressions fall at the same time, you can be more confident the page is fading and should be refreshed first.

The 5 things monthly GEO maintenance actually involves

Monthly GEO maintenance means measuring on a fixed schedule, refreshing the pages that get cited, covering newly emerging questions, and changing only one thing at a time.

1. Measure every week. Ask a fixed set of questions in ChatGPT, Perplexity and Google AI Overviews, 3 times each, and record who gets named, who gets cited and which questions slipped.
2. Refresh cited pages. Update numbers, dates and verified sources, and make the answer paragraph that AI quotes in full more direct.
3. Chase new questions. Each month, add answers to questions customers are really asking that your pages do not yet cover.
4. Change one thing at a time. Edit one thing on one page this week, so next week you know which change worked.
5. Report monthly. Which questions named you, which ones dropped and what changes next month, written in language the brand owner can follow.

If you want to run this in-house, start with 5 questions and two engines, and ask them at the same time each week. If you plan to hire help, our guide to choosing a GEO agency lists what to ask a provider.

If someone tells you GEO is a one-time job, think twice. GEO comes included with our SEO service at the same price: USDT 900 to build, then USDT 400 per site per month, with no revenue share. That one monthly fee covers weekly AI-citation measurement and monthly refreshes. Details are on the pricing page, and the GEO method is on our GEO service page.

FAQ

Does GEO keep paying off for years once it is done, like SEO?

No. Traditional SEO rankings compound, and a well-maintained article can hold for years. AI citation half-lives are measured in weeks. Profound found a median of 11 days from peak, and other estimates run up to about 5 weeks. Leave the work alone and citations decay on their own.

Isn't 11 days an exaggeration?

The 11 days is a median, and it is counted from the citation peak. About 22% of pages in the study lasted longer, with a median of 27 to 29 days. A more accurate summary is that most pages lose half their citations in about two weeks and a minority last around a month.

How often should I update my pages?

Review your cited pages at least once a month and measure results every week. You do not need to edit every page every week. What matters is knowing which question slipped, then updating the numbers, dates and answer on that specific page.

Is monthly maintenance just changing the date?

No, and it should not be. Changing the date without changing the content is obvious to both AI and readers. Real maintenance means updating numbers and sources, answering new questions, and making the most frequently quoted paragraphs more direct.

Do small brands need monthly maintenance too?

Yes, but the scope can be smaller. Pick the 5 questions closest to a purchase decision and keep those pages in shape each month. There is no need to track 20 questions from day one.

Disclosure: The research figures in this article come from third parties, each with its own measurement method. Our own numbers come from weekly tracking of a single brand, and your brand may see very different swings.

---

Explore our advertising strategy & media buying services →