Google AI Mode in September 2026: Search is being folded into it

1. Timeline: AI Mode in 2026

2. The big shift: AI Overviews becomes a doorway into AI Mode

Until this summer, AI Overviews and AI Mode were two separate surfaces: a summary on top of the results page, and a conversational tab you had to open. Google is now merging the paths, in three moves:

• Automatic expansion (August 28). For some queries the AI Overview unfolds into a full AI Mode-style answer, without the Show more button, with the Ask anything follow-up box loaded by default. Organic results move further down.
• Links that stay inside Google (September 21-22). Some underlined text in AI Overviews now opens an AI Mode conversation rather than a website.
• More sign-in prompts. AI Mode increasingly asks searchers to sign in, including by default in Incognito — which means more personalized answers.

There is a counter-signal: the share of AI Overviews that contain in-text links to websites rose to about 26% after September 11, according to Peec AI (sample and method undisclosed). But some of those links now lead to AI Mode, not to you — and the AI Mode queries they trigger count as neither impressions nor clicks in Search Console.

What it means: the old split — "passage optimization for AI Overviews, fan-out coverage for AI Mode" — no longer holds. Any query that triggers an AI Overview can turn into an AI Mode session. Cover the sub-questions of your topic everywhere, not only on the pages you target for AI Mode. Our step-by-step method is in How to Appear in AI Mode.

3. Which model answers — and why it matters for citations

Gemini 3.5 Flash has been the global default for AI Mode since I/O in May. Newer models now reach paying subscribers first, through the model menu in the Ask anything bar:

Two model swaps in three weeks is a measurement problem. When 3.8 Flash landed, some answers came back with no links or citations at all; Google called it unintended and fixed it by September 5. If your citation share moves, rule out a model change before crediting or blaming your content. Log the date, model, language and signed-in state of every manual test.

4. Measuring AI Mode: what Search Console now shows

Announced on June 3 and rolled out to all websites worldwide on August 31, 2026, the Generative AI performance report is the first first-party view of AI Mode visibility.

• What it shows: impressions in AI Overviews, AI Mode and Discover's AI features, by page, country, device and date.
• What it doesn't: clicks, CTR and queries. Sites with too few AI impressions may not see the report yet.
• The opt-out: a property-level setting removes your content from these features — no traffic, no impressions from them — without affecting classic ranking. Training is governed separately by Google-Extended. In the UK, the CMA requires page-level controls by March 2027.

Pair that report with your analytics: AI impressions per page on one side, classic clicks on the other. The pages where impressions climb while clicks fall are the ones being read inside AI answers. Full method: Measure Your AI Visibility.

5. AI Mode goes agentic: travel, bookings, checkout

• Travel (August 27): flight price tracking, hotel discovery and booking help, miles-and-points pricing, and Canvas for day-by-day itineraries.
• Local services: the agentic booking announced at I/O (home repair, beauty, pet care, with the agent calling providers) targets the US first.
• Checkout: UCP-powered checkout is open to eligible US merchants, with global expansion planned through 2026. On September 26 Google started testing a Buy button with Flipkart in India, inside Gemini and AI Mode.

The common thread: the agent reads structured data (prices, availability, service area, stock), not your prose. Merchant Center feeds and Google Business Profile are where agentic AI Mode gets its facts.

6. France: the first numbers

Ahrefs published the first measurement on August 17, 2026: 963 of the 1,000 French domains with the most clicks, 28 days before July 22 compared with 9 days after.

• Median across all sites: -5.7% CTR and -8.8% clicks.
• Sites where more than 20% of queries trigger an AI Overview: -23.1% CTR (-24.8% against the control group).
• Roughly one point of CTR lost per extra point of AI Overview rate — the relationship is close to linear.
• .fr domains: -12.3% clicks at the median. Health is the most exposed sector (22.2% AI Overview rate, -20.4% CTR).
• 48% of domains lost more than 10% of daily clicks; 19% more than 30%; 5% more than 50%.

Full French context: AI Overviews & AI Mode in France.

7. Elsewhere in AI search (August-September 2026)

• ChatGPT Ads reached France and 30 other European markets on August 24; self-serve Ads Manager opened on August 31. Shopping placements rely on product feeds.
• The Gemini app passed 1 billion monthly users in August.
• Site reputation abuse: since August 30, Google no longer applies these manual actions for searchers in the European Economic Area, after European Commission scrutiny.
• August 2026 spam update: rolled out August 18-21.
• What assistants actually read: Wispra's first AI Barometer (September 25) finds ChatGPT sends 81.6% of assistant-referred visitors, Gemini 9.1%. Our breakdown: AI Barometer: what ChatGPT, Claude and Perplexity read.

8. What to do now

1. Treat every AI Overview query as an AI Mode query. Cover the follow-up sub-questions on the same page or in linked pages.
2. Open the Generative AI report in Search Console and set a baseline of AI Mode impressions per page before the next change lands.
3. Version your tests. Date, model, language, signed in or not — otherwise a model swap looks like a content win or loss.
4. Fix your structured facts. Merchant Center for products, Business Profile for local: the agentic features read them first.
5. French sites: compute your AI Overview exposure. On the Ahrefs curve each point costs about a point of CTR — prioritize the exposed pages where you can become the cited source.

Frequently asked questions

Sources

• Google — Search at I/O 2026
• Google Search Central — Introducing Search Generative AI performance reports
• Search Engine Journal — Search Console AI reports rolled out worldwide
• Search Engine Roundtable — Google making AI Overviews into AI Mode responses
• Search Engine Roundtable — AI Overview links taking you to AI Mode over web pages
• Search Engine Roundtable — Google Search using Gemini 3.7 Flash in AI Mode
• Search Engine Land — Gemini 3.8 Flash rolling out in Google Search
• Search Engine Roundtable — September 2026 Google webmaster report
• Shopifreaks — AI Overviews with in-text links jump to 26%
• Google Merchant Center — About the Universal Commerce Protocol (UCP)
• TechCrunch — Google tests buying from Flipkart through Gemini and AI Mode
• Ahrefs — 1 mois d'AI Overviews en France et déjà -23,1% de taux de clics
• OpenAI — ChatGPT Ads expands across Europe
• Search Engine Roundtable — Google won't enforce its site reputation policy in the EEA