AI Overviews vs AI Mode: Two Google Surfaces Compared

AI Overviews sits on a standard Google results page. Google generates one for some queries, and its AI features documentation says overviews often do not trigger at all. A page can rank well and never appear in an overview simply because no overview was shown for that query.

AI Mode is a separate surface. When someone searches inside it, an AI answer is the point of the page, so the open question is which sources the answer draws on, not whether an answer appears.

What this means for you:

• For AI Overviews, the first check is whether your target queries show an overview at all.
• For AI Mode, the first check is which links the answer cites for those queries.

Both surfaces change how the classic results page performs, which we cover in how AI search features affect organic results.

Google's AI features documentation says AI Overviews and AI Mode "may use different models and techniques" and can return different links for the same query. Treat them as two systems that share an index, not one system with two layouts.

On models, as of October 2026: Google said in its I/O Search post that AI Mode has defaulted to Gemini 3.5 Flash since 19 May 2026. AI Overviews uses the "Gemini 3" family, according to a secondary report quoting Google, and Google publishes no finer version. More detail is in which models power AI Mode and AI Overviews.

On technique, Google describes a "query fan-out" approach that issues multiple related searches across subtopics. The searches it actually runs are not visible to site owners, so any test prompt you choose is a proxy. See AI Mode query fan-out and source selection.

The surfaces also react differently to the same change. In Ahrefs' matched-control schema study, AI Overviews citations fell 4.6% on treated pages while AI Mode citations rose 2.4%, and Ahrefs concluded schema produced no major uplift on any platform. The lesson is not about schema. It is that a result measured on one surface does not transfer to the other.

Google's eligibility rule covers both surfaces in one sentence: a page "must be indexed and eligible to be shown in Google Search with a snippet" to appear as a supporting link, and "there are no additional technical requirements." Google adds that indexing and serving isn't guaranteed. Eligibility gets you considered. It does not get you cited.

There is no robots.txt token that targets AI Overviews or AI Mode. Google says AI is built into Search, so robots.txt rules for Googlebot are the control. Blocking Google-Extended does not remove you either: Google says it does not impact inclusion in Search.

The things that do remove you are the same for both:

1. A Googlebot disallow in robots.txt for the pages that matter.
2. A noindex tag, which takes the page out of the index.
3. nosnippet, max-snippet:0 or data-nosnippet, which Google documents as controls that limit what appears in AI features. These are often inherited from a template by accident.
4. The Search Console generative AI control. Inclusion is the default, but an owner can opt out, and child properties inherit the parent's setting. Google is still rolling the control out to a subset of owners. More in do I need to opt in to AI Overviews.

The Otterly experiment shows the dependency in practice: when Google deindexed its two test sites, Google's AI surfaces almost stopped citing them. For the full picture of what is and is not in your control, see how to get cited in AI Overviews and AI Mode.

Search Console's generative AI report covers both surfaces, but it shows impressions only. Its dimensions are pages, countries, dates and devices. There are no clicks, no CTR and no position. Google completed the global rollout around 11 August 2026, and a confirmed Google-side bug depressed impressions from around 12 August, so treat trends in that window with care. Our walkthrough of the Search Console generative AI report covers the setup.

No AI rank exists to track. Google says third-party tools don't have access to its internal ranking data, so a "position in AI Mode" number has nothing to be checked against.

What you can do is run the same buyer queries on both surfaces and record which links each one shows. Our free way to compare AI Mode and AI Overview answers explains the manual method, and 99Visibility's free AI Mode Checker runs a query for you. Log the date, the query and the cited URLs for each surface in separate columns. A blended number would hide the difference you are trying to see.

Use the split that matches the question you are answering.

• Missing from both surfaces: check eligibility first. Confirm indexing, Googlebot access, snippet directives and the Search Console control. One fix covers both.
• Present on one surface, absent on the other: your page is eligible, so this is surface behaviour, not a block. Look at which pages each one cites instead. When engines cite other sites, being named on those sites is associated with appearing in the answer, with no guaranteed effect.
• Reporting to leadership: report AI Overviews and AI Mode as separate lines, label them impressions only, and note the August 2026 data issue.
• Testing a change: measure each surface before and after, separately. Ahrefs' schema result shows one surface can move up while the other moves down.
• Choosing what to fix: prioritise access and snippet controls. Google says no special optimizations are needed for either surface, and no markup or AI-specific file has evidence behind it.

Does blocking Google-Extended remove me from AI Overviews or AI Mode? No. Google says Google-Extended does not impact a site's inclusion in Google Search and is not used as a ranking signal. It governs training and grounding for Gemini Apps and Vertex AI. AI Overviews and AI Mode follow Googlebot's robots.txt rules, snippet directives and the Search Console generative AI control. If you want out of both surfaces, those are the levers. If you want in, check that none of them is blocking you.

Do I need schema or an llms.txt file for AI Mode? No. Google's guide to generative AI features says you don't need new machine-readable files, AI text files or special markup to appear, because Google Search doesn't use them. Ahrefs' matched-control study found adding schema produced no major uplift on any platform. Existing markup does no harm, so there is no reason to remove it. It just isn't a lever for either surface.

Can I see AI Mode clicks in Search Console? No. As of October 2026, the generative AI report in Search Console shows impressions only for AI Overviews and AI Mode. There are no clicks, no CTR and no position dimension. Google has described more metrics only as a future intention. Until then, impressions tell you that a page was shown, not whether anyone visited it.

If I rank in the top 10, will AI Overviews cite me? Not necessarily. Ahrefs found that 37.9% of URLs cited in AI Overviews also appeared in the first 10 results, in a March 2026 study. That leaves most citations coming from further down. Ranking helps make a page a candidate, but Google says serving isn't guaranteed. Our evidence has no equivalent figure for AI Mode, so do not assume the same overlap applies there.