October 2026: the AI answer is now the default on commercial searches.
The October 2026 reading: most searches now end without a click, the monthly reading stands at 78 (up from 75 in July), AI Overviews now sit on nearly nine in ten commercial searches, and ChatGPT has passed a billion weekly users. mention.report is the standing reading on how findable brands are inside AI search: the prevalence, the engines, and the widening gap between ranking and being cited. The Mention Score reads 0 to 100: how findable and citable brands are, on average, across the major AI answer engines this month.
Key facts, October 2026
- In October 2026 the Mention Score is 78 out of 100, up from 75 in July 2026.
- In 2026, 68% of US Google searches end without a click to a website (SparkToro, January to April 2026 panel).
- In August 2026, 88% of tracked US commercial keywords showed a Google AI Overview, up from 46% in September 2025 (Semrush, October 2026).
- In September 2026, OpenAI confirmed ChatGPT has passed 1 billion weekly users.
- In the latest measured period (March to April 2026), ChatGPT carried 62.6% of brand AI referrals, Claude 18.5%, Gemini 10.6%, Perplexity 7.3% (Goodie, Wave 2).
- In May 2026, 84% of links cited by ChatGPT, Claude, and Gemini came from earned sources and 27% from journalism (Muck Rack Generative Pulse, 25M+ links).
Do not just read the report. Read your own.
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A low score is fixable. Mention Group, the consultancy behind this report, runs the full diagnostic and does the work of moving brands from ranked to cited.
In October, 68% of Google searches still end without a click.
When an AI answer appears, the user usually has what they need before any link. The reading is starkest inside the AI surfaces themselves, where the answer is the entire experience.
Zero-click rate, by context
share ending without a clickA randomized field experiment found that AI Overviews cut outbound organic clicks by 38% on the queries where they appear, pushing the zero-click rate on those queries from 54% to 72%. The effect was strongest when the Overview sat at the top of the page, which it did 85% of the time.
Gartner expects traditional search query volume to fall around 25% as answer engines absorb the everyday questions that used to start on Google.
ChatGPT still leads AI referrals, but its share keeps slipping.
ChatGPT opened the category and still leads it, but its near monopoly has fractured. Measured by brand referral traffic, four engines now split almost the entire market, and the mix keeps moving month to month. Where your customers ask matters as much as what they ask.
Share of measurable AI referrals
brand-averaged, Mar to Apr 2026Read the scale before the share. AI platforms now generate roughly 45 billion sessions a month worldwide, and about 83% of that happens inside mobile apps that browser-based analytics never see. The shift is larger than most dashboards report, because the dashboards are looking in the wrong place.
Methodologies differ. Other panels that weight by total query volume still put ChatGPT near 60% of AI search with Gemini and Copilot next. We show the spread on purpose. A single tidy number would be less honest than the range.
Ranking is still important. Being mentioned is becoming essential.
Ranking and citation have come apart.
This is the finding that should move budgets. The overlap between holding a top-ten Google ranking and being cited in the AI Overview for that same query has collapsed in under a year. The page that wins the search result is increasingly not the page the AI quotes.
Top-10 ranking and AI Overview citation overlap
share of cited sources also ranking top 10When an AI Overview appears, organic click-through has been measured to drop by 58 to 61% for the pages that used to win the click. The traffic does not simply vanish. It reroutes to whoever the model decided to cite.
Which makes citation the new ranking. Brands cited inside an AI Overview earn about 35% more organic clicks and 91% more paid clicks than competitors left out of it. Being in the answer is now the position worth fighting for.
AI sends fewer visitors. They are worth far more.
Two things are true at once. The overall pool of clicks shrinks, because most AI answers end without one. But citation decides who gets the clicks that remain, and the people who do arrive have already done their research inside the answer, so they land further down the decision and convert at rates traditional search cannot touch.
Independent studies put AI-referred visitors at roughly 4.4 times the value of the average organic visitor, converting about three times as often. 79% of consumers now use some form of AI-enhanced search, and roughly 70% say they trust the generated results.
One structured visibility program took a company from 2.4% to 12.9% AI visibility in 92 days, with a fifth of its demo requests influenced by AI search. What earns a citation is now reasonably clear: content that is structured and clearly attributed, consistent and verifiable signals about who you are, and a presence in the third-party sources the engines already trust. The lever exists. Most brands are simply not pulling it yet.
What AI cites is mostly earned. Journalism is about a quarter of it.
Muck Rack’s Generative Pulse study of more than 25 million links cited by ChatGPT, Claude, and Gemini (May 2026) found that 84% of AI citations come from earned sources, a share that has held between 82% and 89% since July 2025. Journalism alone made up 27% of cited links.
Read the range, not the headline. “Earned” in that study includes Wikipedia, Reddit, academic and government sources, not only press coverage, and it does not measure Google AI Overviews. Independent agency tracking of more than 3 million data points also puts journalism at roughly a quarter of citations.
What it means: press coverage will not carry a brand alone, but it is the largest single slice a brand can directly work for. Press releases surfaced mostly in industry-trend answers, about 3.5 times as often as in best-of answers. Releases build category presence. Coverage, reviews, and third-party mentions win the recommendation.
Get the complete Mention Report.
The full edition includes the industry-by-industry breakdown, the engine citation patterns, and the playbook for moving from ranked to cited. Two fields and the full report opens right away.
A standing reading, triangulated and dated.
The monthly reading, the index behind this report, does not run on a single feed. Each reading is assembled from multiple independent measurements, the spread is shown where sources disagree, and every edition carries its date so movement is comparable over time.
Aggregate
Pull the latest public measurements on AI search prevalence, engine share, and citation behavior.
Triangulate
Cross-check each figure across panels and methods. Where they diverge, we publish the range.
Benchmark
Set the readings against the prior edition so the direction and pace of change are visible.
Publish
Release on a fixed cadence under a dated edition, built to be cited and re-checked.
Sources referenced in this edition: Similarweb · Graphite · SensorTower · Goodie AI Search Traffic Report · Semrush · Seer Interactive · Ahrefs · Pew Research · BrightEdge · Gartner · SparkToro · Exposure Ninja · Contently · Search Engine Journal · Muck Rack Generative Pulse · PR Daily. Figures span September 2025 to September 2026. Ranges reflect genuine differences in measurement, not estimates. The readings behind each edition are published as open data and announced on the RSS feed.
The Mention Report is published by Mention Group, the Milwaukee PR and discoverability consultancy behind the index. If your brand needs to show up in these answers, through earned media or your own site, that is the work we do.
The monthly reading moved to 78. Here is how to read October.
The report stays purely measured, so the explaining happens next door. Each edition, a short bylined insight on what the reading says and which indicators we are watching, with no predictions. Read the latest insight or browse all insights. The index paused for August and September. October resumes the monthly reading. This is the October 2026 edition; the previous reading is The Mention Report, July 2026.