AI Search Statistics 2026: 60+ Cited Data Points on ChatGPT, AI Overviews & GEO

AI search has moved from novelty to default. ChatGPT now handles 2.5 billion prompts a day, Google’s AI Overviews reach over 2 billion monthly users, and on searches where an AI summary appears, only 8% of users click through to a website.

This page collects the most important AI search statistics for 2026 — every number verified against its original source and linked, so you can cite it with confidence.

1. AI Search Adoption & Usage Statistics

How many people actually use AI search? The headline numbers are now measured in billions.

• 900 million — people use ChatGPT every week as of February 2026, up from 800 million in October 2025 (OpenAI via TechCrunch).
• 2.5 billion — prompts are sent to ChatGPT every day, roughly 330 million from the US (OpenAI via Axios/TechCrunch, Jul 2025).
• 750 million+ — people use the Google Gemini app each month, up from 650 million the prior quarter (Alphabet Q4 2025 earnings).
• 2 billion+ — people use Google AI Overviews monthly across 200+ countries and 40 languages — up from 1.5 billion a quarter earlier (Alphabet Q2 2025 earnings).
• 2.5 billion+ — monthly AI Overviews users as of May 2026, per Google’s CEO — reported via CNBC video, treat as directional (CNBC, May 2026).
• 780 million — queries were processed by Perplexity in May 2025, growing 20%+ month over month (Perplexity CEO, Jun 2025).
• 20 million+ — paid Microsoft 365 Copilot seats are now active across enterprises (Microsoft Q3 FY2026 earnings).
• 34% — of US adults have used ChatGPT — about double the 2023 share — rising to 58% of under-30s (Pew Research, Jun 2025).
• 121 million — Americans (35.8%) used generative AI in 2025, forecast to reach 133 million (39.2%) in 2026 (eMarketer, 2026).
• ~55% — ChatGPT’s estimated share of AI-chatbot web visits in early 2026, down from ~76% a year earlier — Similarweb data via aggregator, directional (reported Apr 2026).

AI search isn’t early-adopter behaviour anymore — it’s how a third of US adults, and the majority of under-30s, already research questions. Deep dive: how many people use ChatGPT in 2026. For the mechanics, see our guide to how ChatGPT chooses which clinic to recommend.

2. Google AI Overviews Statistics

Google AI Overviews (formerly SGE) are the most-seen AI search feature on Earth, sitting on top of the world’s biggest search engine. Here’s how often they appear — and what they do to clicks.

• 18% — of all Google searches now produce an AI Overview, and 58% of users saw at least one in a month (Pew Research, Jul 2025).
• 8% vs 15% — users clicked through on just 8% of searches showing an AI summary, versus 15% without — roughly half (Pew Research, Jul 2025).
• 1% — of users clicked a source link inside an AI summary — the “quoted but not visited” problem (Pew Research, Jul 2025).
• 26% vs 16% — share of users who ended their session entirely after an AI-summary page versus a standard results page (Pew Research, Jul 2025).
• 88% — of AI summaries cited three or more sources, with a median length of just 67 words (Pew Research, Jul 2025).
• 8% to 53% — AI Overviews triggered on 8% of one-to-two-word queries but 53% of 10+ word queries, and 60% of question-format queries (Pew Research, Jul 2025).
• −34.5% — the drop in click-through for the #1 organic result when an AI Overview is present, across 300,000 keywords (Ahrefs, 2025).
• 11 links — the average number of sources cited per AI Overview (Semrush, 2025).
• 20–26% — the overlap between AI Overview links and the top-10 organic results; the #1 result appeared in only 46% of desktop AI Overviews (Semrush, 2025).
• 94% — of AI Overviews cite at least one top-20 URL, but 44% of citations come from beyond the top 20 — ranking helps but isn’t required (seoClarity, Oct 2025).
• 29.9% — of keywords showed an AI Overview, rising to 74% for problem-solving queries — Authoritas Dec 2024 dataset, own taxonomy (Authoritas).

Every study agrees: AI Overviews appear most on informational and question queries, cut clicks roughly in half, and pull sources from well beyond page one. If your business is invisible here, see why your clinic isn’t showing in ChatGPT.

3. Zero-Click & Search Behaviour Shift Statistics

The bigger story is the decline of the click itself. Users increasingly get their answer on the results page and never visit a website.

• 25% — Gartner’s forecast drop in traditional search engine volume by 2026 as users shift to AI chatbots. Exact wording: “traditional search engine volume will drop 25%.” A forecast about volume, not traffic (Gartner, Feb 2024).
• 68% — of US Google searches ended without a click in early 2026, up from 60% in 2024 — under one third now send a click to the open web (SparkToro / Similarweb, Jun 2026).
• 58.5% — of US searches ended in zero clicks in the prior benchmark; per 1,000 searches only 360 clicks reached the open web (SparkToro / Datos, Jul 2024).
• ~80% — of consumers rely on zero-click results in at least 40% of searches, cutting organic traffic an estimated 15–25% (Bain & Company, Feb 2025).
• 41% — of Gen Z turn to social platforms first when searching, ahead of search engines (32%) and AI chat (11%) (Sprout Social, May 2025).
• +4,700% — year-over-year growth in generative-AI referral traffic to US retail sites by July 2025 (Adobe Analytics, Aug 2025).
• 73% — of consumers who shop with AI say it is now their primary source of product research (Adobe Analytics, Aug 2025).
• 53% — of consumers distrust AI search results, and 61% want a way to turn AI summaries off — adoption and trust aren’t the same thing (Gartner, Sep 2025).

The shift is structural, not seasonal. Search is becoming an answer engine, and the click — what traditional SEO was built to win — is no longer guaranteed. Deep dive: the zero-click search statistics for 2026. That’s exactly why GEO and SEO are now different disciplines.

4. Business Impact: LLM Referral Traffic & Conversion Statistics

If AI keeps the click, does it still send business? The data says yes — in small but unusually high-quality volumes.

• 1.13 billion — referral visits were sent to websites by AI platforms in June 2025 alone — still tiny next to Google’s 191 billion (Similarweb, Jul 2025).
• +357% — year-over-year growth in AI referral traffic from June 2024 to June 2025 (Similarweb, Jul 2025).
• 7.1% — the conversion rate of ChatGPT referral traffic, second only to paid search (7.8%) and ahead of organic, direct and social (Similarweb, May 2026).
• 1.66% vs 0.15% — LLM-referred visitors signed up at over ten times the rate of search-referred visitors across 1,277 domains (Microsoft Clarity, Nov 2025).
• +155.6% — growth in AI-driven traffic over eight months, versus +24% for search and +21.5% for social (Microsoft Clarity, Nov 2025).
• +527% — year-over-year surge in AI-sourced sessions across a 1.96-million-session study (Previsible, Dec 2025).
• 0.13% — AI traffic as a share of total sessions, but it concentrates on high-intent pages, reaching 1.14% on industry/solution pages (Previsible, Dec 2025).
• 4.4× — the value of an average LLM visitor versus an organic one, by conversion — original Semrush post offline, figure preserved via MarTech (MarTech, Jun 2025).
• No significant difference — one rigorous counter-study found LLM traffic converted at 4.87% versus organic’s 4.60% (p=0.794) — a useful reality check (Amsive, Sep 2025).
• 12% → 94% — enterprises put 12% of digital budgets into answer-engine optimisation in 2025, and 94% plan to increase it in 2026 (Conductor, Jan 2026).
• 45% — of B2B buyers used generative AI during a recent purchase (Gartner, May 2026).

The honest read: AI referral volume is still small, conversion-quality numbers vary by study, and at least one careful analysis finds no edge over organic. But the direction is unambiguous, and the visitors that do arrive are high-intent — which is why nearly every enterprise is now funding GEO.

5. How LLMs Choose & Cite Sources (GEO/AEO Mechanics)

This is the section that matters most if you want to get cited. What actually drives whether an AI names your brand?

• Up to 40% — the improvement in a source’s visibility within AI answers achievable with GEO techniques, per the foundational academic paper (Aggarwal et al., KDD 2024).
• 30–40% — the relative uplift from the three most effective GEO tactics — citing sources, adding quotations, and adding statistics. Keyword stuffing decreased visibility (Aggarwal et al., arXiv).
• ~3× stronger — brand mentions correlated with AI Overview visibility (0.664) than backlinks did (0.218) across 75,000 brands — correlation, not proven causation (Ahrefs, May 2025).
• No uplift from schema — adding schema markup changed AI citations by roughly nothing and slightly reduced AI Overview citations (−4.6%) on already-cited pages (Ahrefs, 2026).
• YouTube 20.9%, Reddit 19.6%, Facebook 11.6% — the most-cited domains in Google AI Overviews — AI leans heavily on UGC, social and video (Ahrefs Brand Radar, Jun 2026).
• Reddit #1 — the most-cited domain across all AI engines combined, followed by YouTube and LinkedIn, across 30 million sources (Peec AI via Search Engine Land, Mar 2026).
• 61.7% — of AI citations don’t produce a brand mention at all — the “ghost citation” problem, where your link is used but your name never appears (Semrush, Jun 2026).
• 119 words — the average length of an AI Overview answer on desktop (91 on mobile) — concise, extractable passages win (Semrush, Sep 2024).
• 32.3% → 54.5% — the rise in AI Overview citations that also rank organically over 16 months — but nearly half still come from non-ranking pages (BrightEdge, Oct 2025).

The mechanics point one way: get mentioned across the web (especially Reddit, YouTube and authoritative third-party sites), write concise quotable passages, cite your own sources, and add real statistics. Schema and keyword density barely move the needle here. Deep dive: how AI decides which sources to cite. For the fundamentals underneath all of it, see our guides to on-page SEO and building backlinks and brand mentions.

6. Local, Healthcare & Thailand AI Search Statistics

For clinics, restaurants and local businesses — especially in Thailand — the AI search shift is already changing how patients and customers find you.

• 40 million — people ask ChatGPT a health question every single day (OpenAI, Jan 2026).
• 200 million — of ChatGPT’s weekly users — one in four — ask at least one health question; over 5% of all messages are health-related (OpenAI via Becker’s, Jan 2026).
• ~70% — of health conversations on ChatGPT happen outside normal clinic hours — when no receptionist is answering (OpenAI via Healthcare Dive, Jan 2026).
• 25% — of US adults have used an AI tool for health info; among them, 59% research before a doctor visit. Only 4% strongly trust AI’s accuracy (West Health–Gallup, Apr 2026).
• 45% — of US consumers use AI tools to find or choose a local business — up from 6% a year earlier, now the third most-used recommendation tool behind Google and Facebook (BrightLocal, Mar 2026).
• 2.42 billion — people worldwide actively use generative AI tools — 29.2% of the global population — after a 141% YoY jump (DataReportal, Apr 2026).
• 91.8% — of online adults in Southeast Asia report using AI tools — broad “AI tools” definition, directional (DataReportal, Apr 2026).
• 67.8 million — internet users in Thailand — 94.7% of the population — a near-saturated, highly connected market (DataReportal Digital 2026 Thailand, Nov 2025).
• 84.3% — of Thai AI users choose ChatGPT as their primary AI tool, far ahead of Gemini (6.3%) — reported via Nation Thailand (Nation Thailand, Nov 2025).
• ~3 million — international medical tourists visited Thailand in 2024 — a high-value, English-language audience that researches online before booking — TAT/embassy summaries, directional (Statista topic hub).

Put these together and the opportunity is obvious. Thailand has a near-universal, English-comfortable, AI-using population and millions of high-value medical tourists who ask ChatGPT for recommendations — often at night, when your clinic is closed. The clinics that get named in those answers win the booking. The rest never know they were in the running. Our AI search optimization guide for Thailand clinics and the 10-point AI search audit show exactly how to start.

How We Verified These Statistics

Every statistic on this page was checked against its original source before publishing. We prioritised primary sources — company earnings calls, Pew Research, Gartner, academic papers and first-party platform data — over second-hand roundups. Where a number could only be confirmed through a reputable secondary outlet (for example, a CEO statement reported by TechCrunch), we say so and link to it. Figures marked directional come from third-party estimates or single-outlet reports and should be treated as indicative. We dropped dozens of widely-circulated “AI search stats” we couldn’t trace to a verifiable source. This page is updated as new studies are published.

Frequently Asked Questions

How many people use AI search in 2026?

ChatGPT alone has 900 million weekly active users and handles 2.5 billion prompts per day, while Google AI Overviews reach over 2 billion people monthly and the Gemini app has 750 million monthly users. In the US, 34% of adults have used ChatGPT, rising to 58% of under-30s. AI search is now mainstream, not niche.

Do AI Overviews really reduce website clicks?

Yes. Pew Research found users clicked through to a website on only 8% of searches that showed an AI summary, versus 15% without one — roughly halving click-through. Only 1% clicked a link inside the AI summary itself. Ahrefs separately measured a 34.5% click-through drop for the #1 organic result when an AI Overview is present.

What percentage of Google searches are zero-click?

About 68% of US Google searches ended without a click in early 2026, according to SparkToro using Similarweb data — up from roughly 60% in 2024. That means less than one third of searches now send a click to the open web, driven partly by AI summaries and featured answers.

What actually makes an LLM cite your brand?

The strongest measured signal is brand mentions across the web, which correlated with AI Overview visibility about three times more strongly than backlinks in Ahrefs research on 75,000 brands. Academic research found that citing sources, adding quotations and including statistics each lifted visibility in AI answers 30–40%. Notably, schema markup showed no meaningful citation uplift, and keyword stuffing reduced visibility.

Is AI search traffic worth optimising for if it is still small?

The volume is small — around 0.13% of total sessions — but the quality is high. ChatGPT referral traffic converted at 7.1% in Similarweb data, second only to paid search, and Microsoft Clarity found LLM visitors signed up at over ten times the rate of search visitors. AI referral traffic also grew 357% year over year, and 94% of enterprises plan to increase GEO investment in 2026.

Are people really using AI to find clinics and local businesses?

45% of US consumers now use AI tools to find or choose a local business, up from 6% a year earlier. In healthcare specifically, 40 million people ask ChatGPT a health question every day, and about 70% of those conversations happen outside clinic hours. For service businesses, being named in AI answers is becoming a primary discovery channel.

Your Business Is Being Recommended by AI — Or It Isn’t

Every statistic on this page points to the same conclusion: AI search is now where a large and growing share of buying decisions begin. The businesses that get named inside ChatGPT, Perplexity and Google AI Overviews capture that demand. Everyone else is invisible to it — and won’t even see the leads they’re losing.

Locully helps clinics and businesses in Thailand get found and recommended in AI search. To see where you stand, see how our GEO service works or start with a GEO audit.