How often should you refresh content to stay visible in AI search?

If you’re wondering how often you should refresh your content to stay visible in AI search, the honest answer is somewhere between once a month and once a year, depending on the page. This isn’t really a satisfying answer on its own, but it’s backed by real data rather than speculation and the reasoning behind it is worth understanding before you settle on a refresh schedule.

AI assistants prefer citing fresher content than traditional Google search does, though it’s not the same across every platform. Here’s what the research actually shows and how you can use this as part of your GEO strategy.

Why freshness matters more for AI search than for SEO

Traditional SEO treated refreshed content as a mild, occasional nudge. Most pages that ranked well could sit untouched for a year or more without much consequence.

AI search tools work differently. Retrieval-based systems like Perplexity and ChatGPT search the live web and weigh recency when deciding what to surface, rather than relying purely on a static index. Google’s own quality guidelines already flag “last updated” dates as a signal worth paying attention to. Put together, that means a page can still rank reasonably well in traditional search while quietly losing ground in AI-generated answers.

What the data actually shows

Ahrefs analysed roughly 17 million citations across seven AI platforms, including ChatGPT, Perplexity, Gemini, Copilot and Google’s AI Overviews, and compared them against traditional organic search results.

Content cited by AI assistants is on average 25.7 per cent “fresher” than content in organic search results, based on time since first publication. In plain terms, AI-cited pages average around 2.9 years old, against 3.9 years for organic results, a full year’s difference.

It’s worth being precise here, though. That 25.7 per cent figure is based on the original publish date, not on when a page was last updated. Looking specifically at update dates, the gap is smaller. AI-cited content is about 13.1 per cent more recently updated than organic results. Since refreshing a page changes its updated date rather than its original publish date, this second, smaller figure is the more relevant one for deciding how often to refresh existing content.

But the pattern isn’t uniform and this is where a lot of the advice circulating online oversimplifies things. According to the Ahrefs study: 

• ChatGPT shows the strongest preference for new content, citing URLs several hundred days newer than organic search results on average.
• Perplexity and Gemini also lean towards fresher content, though less strongly than ChatGPT.
• Google’s AI Overviews are the exception, actually citing slightly older content than organic search, not newer.

So freshness genuinely matters, but how much depends entirely on which AI platform you’re optimising for. A strategy built purely around chasing an average figure will miss the fact that Google’s AI Overviews – still the AI surface with the most eyes on it –  barely reward freshness at all.

A cadence worth working to

Given that pattern, a tiered approach makes more sense than a single blanket rule.

• Fast-changing content (pricing, statistics, comparisons, anything tied to a fact that moves) benefits from a review every one to three months.
• Structural or how-to content holds its value longer and is worth a proper review every three to six months.
• Evergreen, conceptual pieces, the kind explaining a concept rather than a changeable fact, generally only need an annual check.

This isn’t a rule Ahrefs prescribes – it’s a sensible way to apply the findings rather than a number lifted directly from the study. Treat it as a starting framework to adjust once you can see which of your own pages actually respond to updates.

What actually counts as a refresh

Not every update counts equally and this matters more than it sounds.

Google’s own John Mueller has warned against updating a publish date without making any real change to the page underneath it. The same logic almost certainly applies to AI systems, which have no reason to treat a cosmetic date change as evidence that anything meaningful has improved.

A genuine refresh usually involves one of the following:

• Updating statistics, prices or examples that have gone out of date.
• Rewriting a section that’s become inaccurate or thin.
• Adding new information the page was missing.
• Restructuring content for clearer extraction, tighter headings and more direct answers.

Changing the visible date without touching any of this isn’t a refresh. It’s just a date change and it’s unlikely to move the needle either way.

It’s also worth making the update detectable, not just genuine. Update the dateModified value in your page’s schema, make sure your sitemap’s lastmod value reflects the real change, and keep a visible “last updated” date on the page itself. None of this replaces an actual content change, but it gives both search engines and AI crawlers a clear, verifiable signal that something real happened.

How to tell if a refresh actually worked

Once you’ve made a genuine update, it’s worth checking whether it actually shifted anything. Search your key questions on ChatGPT, Perplexity and Google’s AI Overviews before and after a refresh, and note whether your page appears as a cited source.

Give it a few weeks before drawing conclusions as different platforms update on different timelines. A lift in one AI tool won’t necessarily show up in another straight away.

A caution worth keeping in mind

Even among AI-cited pages, the average age is still 2.9 years, so long-lived, well-established content clearly still has a place. Google, still where most search happens, is the platform least influenced by freshness of all.

There’s also a genuine opportunity cost to weigh up. Constantly refreshing older pages takes time that could go to creating something new instead, and low-quality content updated frequently won’t outperform well-researched content that’s a little older. Freshness helps at the margins but it isn’t a substitute for the work being good in the first place.

Want help deciding what to refresh first?

Our GEO strategy audit shows you exactly which pages are losing ground and where a refresh would actually make a difference. Get in touch and we’ll talk you through it.