ChatGPT Ads has arrived in Europe. But where it has been running longest, are market leaders buying?
ChatGPT Ads is OpenAI’s advertising system: sponsored placements shown beneath ChatGPT’s answers, sold at auction and matched to the topic of the live conversation. It went live across 31 European markets in the week of 24 August 2026, and self-serve buying opened to eligible European advertisers on 31 August 2026.
A note before starting. The product is weeks old in Europe and is changing while it is being observed: formats, rules and availability have already shifted several times since February. What follows is a first reading of moving data, not a set of conclusions. It should be treated as such, and checked again in a month.
Most of what has been written about the product describes the American version. In Europe it does not work the same way, and the difference is not cosmetic — it sits in the legal basis for targeting.
The European expansion — 31 markets at once, OpenAI’s largest geographic move so far — was announced in mid-August 2026 and reported by Anu Adegbola for Search Engine Land on 19 August.
Table of Contents
How ChatGPT Ads works
Who sees it. Logged-in adult users on the Free and Go tiers. Plus, Pro, Business, Enterprise and Education remain ad-free. Accounts identified as belonging to under-18s are excluded.
Where it appears. In a separate block beneath the answer, labelled “Sponsored” and visually distinct from the generated text.
What it looks like — and here the sources disagree. A square image and two short lines of text, a headline and a body. On the exact measurements, though, published figures vary wildly, in what is a textbook case of what this article describes further down.
OpenAI’s campaign-creation documentation gives a headline of 16 to 24 characters and copy of 32 to 48; reported maximums are 50 and 100. A great many guides — several of them on page one — publish 30 and 60 instead, which traces back to no official source. On the image, OpenAI has published no dimension specification: a 256×256 minimum circulates, while practitioners running the platform report a square between 640 and 1200 pixels.
Whichever figure is right, the constraint does not change in kind: this is a format of a few dozen characters. There is no room to argue a value proposition; there is room for a name and one blunt reason to click. Anyone porting creative from Google Ads rewrites the message rather than resizing it. And there is only one count worth trusting: the one in the Ads Manager at the moment the ad is built.
With one recent caveat: since 16 September 2026 advertisers can opt into text customisation, which adapts existing headlines and descriptions to the context of a conversation and translates copy into the user’s preferred language. It is optional and the advertiser stays in control of it — but it means the line written in the office is not necessarily the line the reader sees.
How it is targeted. Not keyword matching, and not cross-web behavioural retargeting. Advertisers supply context hints — topics and conversations where their product is relevant — and the system pairs them against the live intent of the conversation, allocating the slot through a second-price auction. Those hints describe a territory; they do not reserve a position.
How it is bought. Through OpenAI’s Ads Manager, on a CPM or CPC basis, with geo-targeting and custom audiences. The $50,000 minimum spend that gated the American debut was removed in May 2026.
As of 16 September 2026, OpenAI describes conversion optimisation with impression billing as generally available, and as the model it recommends: billing is impression-based while delivery optimises toward the conversion goal. The same update brought configurable attribution windows (7-, 14- or 30-day click; 0- or 1-day view) and granular platform targeting — Android app, Android web, desktop web, iOS app and iOS web addressable separately.
(The string also circulates split in two, “chat gpt ads”: it is the same product.)
Why ChatGPT advertising works differently in Europe
In Europe, ChatGPT Ads rests on two distinct legal bases: legitimate interest for contextual advertising, and consent for personalised advertising. This is the two-tier structure the GDPR imposes, and OpenAI adopted it explicitly for Europe.
At European launch, memory and chat history are not used. Contextual ads rely on the content of the live conversation, approximate city-level location, device type, time of day and language. Past chats and assistant memory are excluded. They appear in the product’s global description; in Europe, for now, they are not used.
And one point is widely reported wrong: declining personalisation does not remove advertising. It changes which ads a user sees, not whether they see them.
One structural objection is worth recording. Clara Westbrook, head of data privacy at the law firm Arbor Law, told Digiday that funding only the entry tiers this way may push privacy-conscious users onto a paid plan simply to avoid ads — a paywall built on consent. That is a criticism of the design, not an allegation of breach.
Is ChatGPT Ads available in the United Kingdom?
Yes, and the United Kingdom got there first. ChatGPT advertising went live in the UK on 6 June 2026 — the first European market, more than two months ahead of the 31-market expansion — announced by OpenAI’s VP of Monetization, Benji Shomair. Launch partners included Zalando and Dentsu, alongside technology partners handling the ad infrastructure.
The regulatory position is not the same as the EU’s. Since Brexit the UK operates under the UK GDPR rather than the EU GDPR. The practical consequences for advertisers are close but not identical, and any compliance question should be settled against the UK regime rather than by reading across from an EU analysis.
Self-serve came shortly after. The Ads Manager beta, until then limited to US businesses, was extended to UK advertisers around 19 June 2026. By early September OpenAI’s own availability listing covered dozens of countries for self-service, the United Kingdom and Italy among them.
How many ChatGPT answers carry an ad: the studies disagree
Estimates range from roughly a quarter to over three quarters. All cover July and August 2026, and all measure the US market:
| who measured | sample | what it measures | result |
|---|---|---|---|
| SE Ranking, reported 10 Aug | 50,000+ prompts, 20 niches | commercial prompts | 25.9% |
| Similarweb, July | US desktop chats | all chats | 26% |
| LLM Pulse (Esteve Castells), 25 Jul-4 Aug | 36,153 US answers | answers carrying at least one ad | 71.9% |
| OtterlyAI (Rick Tousseyn), 2-15 Jul | 16 industries | shopping questions | 76.4% |
The spread looks like a methodological scandal. Mostly it is not: these studies use different denominators. “All chats” is not “commercial prompts”, which is not “questions from someone about to buy something”. Similarweb’s 26% and OtterlyAI’s 76.4% can both be accurate descriptions of the same market seen from two angles.
One gap the denominators do not explain is worth stating plainly: Similarweb (26%, July) and LLM Pulse (71.9%, 25 July-4 August) measure closely comparable things and arrive at opposite numbers weeks apart. On that point, from what has been published, the two cannot be reconciled.
It is a dull distinction, and it is the useful one: faced with a circulating figure, the question is not how large it is but what it was calculated on — and in which week. It is the same method that applies when traffic drops and rankings have not moved.
One finding in the SE Ranking data cools the enthusiasm: 14.35% of ChatGPT ads had nothing to do with the prompt they appeared beside — a dating-app question answered alongside a clothing retailer, a newspaper subscription query beside an electricity supplier. The rate varies sharply by category, from 2.6% in pets to over 50% in relationships and in news and politics. The system is young, and it shows.
In twelve industries out of fourteen, the market leader bought no ChatGPT ads
In the United States, in twelve industries out of fourteen, the market leader bought no ChatGPT advertising at all.
The finding comes from OtterlyAI, written by Rick Tousseyn and published on 17 July 2026, covering commercial prompts in the US market sampled daily between 2 and 15 July. (The study tracks sixteen industries but counts leaders across fourteen, without saying which two are left out — worth knowing, in a piece that argues for looking at denominators.)
It is not that advertising is absent in those sectors: ad presence runs from 85.9% in finance and insurance down to 42.3% in healthcare. The slots exist, and they are sold. Somebody else is buying them.
For now the buyers are affiliate marketplaces, comparison sites and lead-generation platforms: businesses that buy performance media for a living and know to the cent what a click is worth. They are also the first to recognise an uncrowded auction. In most categories the household names are not there yet.
And they keep appearing in the answers.
Buying ChatGPT ads does not buy entry into the answer
OpenAI states that advertising does not influence the answers ChatGPT generates. That is a company statement rather than an externally verifiable fact, and should be treated that way — but if it holds, the consequence is clean: buying a placement does not buy entry into the answer.
Two spaces coexist on the same screen, and they are won in two ways that do not substitute for each other. It is the shift from being sold to being chosen, applied to a single screen.
| the bought surface | the earned surface | |
|---|---|---|
| what it is | the “Sponsored” block beneath the answer | the citation inside the answer |
| how it is won | at auction, on CPM, CPC or conversions | through authority, structure, quotability |
| who holds it now | challengers, affiliates, comparison sites | category leaders |
| what it costs | known in advance | built, not booked |
| can it be controlled? | yes, like any campaign | no, and nobody can promise otherwise |
Which is why leaders and challengers are doing different things without either being wrong. A company that is already cited is defending a position it never paid for, and has no reason to trade it for one it would have to keep paying for. A company that is never cited buys distribution while it builds the rest. The real question is not whether ChatGPT advertising is worth buying, but which of the two surfaces a business is on today, and in what role.
The product catalogue feeds both ChatGPT ads and ChatGPT answers
Since 12 May 2026, OpenAI has allowed retailers to connect to ChatGPT Ads the same product catalogue file they already send to Google Shopping, with no reformatting, and to generate ads from it automatically: product names, images and attributes become creative, without building campaigns item by item. The change was reported by Anu Adegbola for Search Engine Land.
This is the one point where the two surfaces touch, because the same catalogue also powers the product cards ChatGPT shows inside organic answers when someone asks what to buy. Previously the two uses were disconnected: catalogue data could inform answers, but could not be used to advertise.
On 16 September 2026 OpenAI added a ChatGPT Ads app in the Shopify App Store, connecting catalogue and measurement tools — for US merchants at first, with international availability announced for later the same month. A HubSpot integration arrived alongside it.
The exception does not overturn the rule: the catalogue does not buy the answer, it feeds both sides of it. For an online retailer, that file has become the entry ticket to both surfaces. An incomplete catalogue — vague titles, missing attributes — costs visibility twice over, once in the organic card and once in the ad. It is the least glamorous work there is, and it has become decisive again.
What is coming next, and why it matters
On 16 September 2026 OpenAI said it is testing Sponsored Agents with selected advertisers in the United States: after clicking an ad, a user may be able to open a clearly labelled conversation with an agent sponsored by that business, to ask follow-up questions and explore what is on offer.
If it leaves testing, the bought surface stops being a box and becomes a dialogue. It does not overturn the distinction drawn above: it stays paid, stays labelled, and stays separate from the organic answer. But it greatly extends what is being bought, and reopens a question the few-dozen-character format appeared to have closed: what to say, once there is room to say something.
The same update lists AI-assisted ad creation in testing, suggesting copy and imagery drawn from the landing page. Both are company announcements about products not yet available in Europe, and should be read as such.
What to do about ChatGPT advertising now
Look at what happens on your own questions. Put the questions a buyer would ask before purchasing to ChatGPT, one at a time, and see whether the company appears, whether a competitor appears, or whether a comparison site has placed itself between the company and its buyer. It is a manual check, and it shows who appears. It does not show why — and it is the second question that decides the budget.
Settle the role before the budget. A company that is cited often and a company that is never cited have different problems, and one campaign solves only one of them.
If the citation is not there yet, the auction is the fastest way to be there. There is no minimum spend any more, the creative runs to a few dozen characters, and it measures at CPC like any other campaign: it is the surface a business can act on this week, while the other one is built over months.
If you buy, start from a blank page. A few dozen characters will not hold a shortened Google ad: they hold a name and one reason to click. Choose the reason before opening the Ads Manager, where the counter gives the real limit of the day.
If you are playing for the citation, work on being quotable. Direct answers, entities named in full, verifiable data, blocks that can be lifted whole without losing their meaning. That is the ground of generative engine optimization, and it is not a shortcut — it is the same thing that makes content useful to a person.
Frequently asked questions
What is ChatGPT Ads?
ChatGPT Ads is OpenAI’s advertising system. It shows sponsored placements beneath ChatGPT’s answers, allocated at auction according to the topic of the live conversation, in a separate and clearly labelled block. Advertisers buy on a CPM, CPC or conversion-optimised basis.
Is ChatGPT Ads available in Europe?
Yes. ChatGPT advertising went live across 31 European markets in the week of 24 August 2026, and self-serve access through the Ads Manager opened to eligible European advertisers on 31 August 2026.
Is ChatGPT Ads available in the United Kingdom?
Yes. ChatGPT advertising went live in the United Kingdom on 6 June 2026, making it the first European market to receive the product, more than two months before the expansion to 31 European markets. The United Kingdom operates under the UK GDPR rather than the EU GDPR, so compliance questions should be assessed against the UK regime.
What do ChatGPT ads look like?
A ChatGPT ad is a square image with a very short headline and body copy. OpenAI’s campaign-creation documentation gives a headline of 16 to 24 characters and copy of 32 to 48, with reported maximums of 50 and 100; OpenAI has published no image dimension specification. The count to treat as authoritative is the one shown in the Ads Manager when the ad is created. The ad appears in a separate block beneath the answer, labelled “Sponsored” and visually distinct from the text ChatGPT generates.
How do advertisers buy ChatGPT ads?
ChatGPT ads are bought through the OpenAI Ads Manager, which opened to eligible European advertisers on 31 August 2026. Buying is available on a CPM, CPC or conversion-optimised basis through a second-price auction, with geo-targeting and custom audiences. The $50,000 minimum spend that applied at the American debut was removed in May 2026.
Who sees advertising on ChatGPT, and which plans are excluded?
Advertising on ChatGPT is shown to logged-in adult users on the Free and Go tiers. The Plus, Pro, Business, Enterprise and Education plans carry no advertising, and accounts identified as belonging to users under 18 are excluded.
Does buying ChatGPT advertising improve the chance of being cited in ChatGPT’s answers?
No. OpenAI states that advertising does not influence the answers ChatGPT generates. The sponsored placement and the citation inside the answer are two distinct surfaces: the first is won at auction and its cost is known in advance, the second is built over time through authority and quotability, and no supplier can guarantee it.
How does ChatGPT Ads targeting work under European rules?
Under European rules, contextual advertising on ChatGPT is targeted using the content of the live conversation, approximate city-level location, device type, time of day and language. At European launch, chat history and assistant memory are not used. Personalised advertising requires the user’s explicit consent.
Does declining personalised advertising on ChatGPT remove the ads?
No. Declining personalisation changes which advertising is shown, not whether it is shown: the user continues to see ads, served on a contextual rather than a personalised basis.
Does ChatGPT Ads use a product catalogue feed?
Yes. Since 12 May 2026, OpenAI has allowed retailers to connect to ChatGPT Ads the same product catalogue file they already send to Google Shopping, with no reformatting, and to generate ads automatically from product names, images and attributes. The same catalogue also powers the product cards ChatGPT shows inside organic answers.
Which surface a business is on is visible to the naked eye: who appears in the answer, and who appears only in the box beneath it. Working out why, and which of the two to hold first and with what budget, is the job that comes after.
→ Let’s talk about how generative models see you
Sources
Third-party figures were checked on 11 September 2026; product facts were re-verified on 16 September 2026. The penetration data covers the United States, where the system has been running longest: the European product is too new for comparable independent measurement.
- Anu Adegbola, ChatGPT Ads are expanding to 31 European countries — Search Engine Land, 19 August 2026: https://searchengineland.com/chatgpt-ads-are-expanding-to-31-european-countries-485468
- Anu Adegbola, OpenAI adds product feed ads to ChatGPT — Search Engine Land, 12 May 2026: https://searchengineland.com/openai-adds-product-feed-ads-to-chatgpt-477208
- Anu Adegbola, Study: ChatGPT ads appear on 26% of commercial prompts — Search Engine Land, 10 August 2026, on the SE Ranking study (50,000+ commercial prompts, 20 niches): https://searchengineland.com/study-chatgpt-ads-appear-on-26-of-commercial-prompts-484590 · original study: https://seranking.com/blog/chatgpt-ads-study/
- Rick Tousseyn, ChatGPT Ads Study: 76.4% of Commercial Answers Carry an Ad, and the Leaders Buy None — OtterlyAI, 17 July 2026: https://otterly.ai/blog/chatgpt-ads-study/
- Esteve Castells, 72% of US ChatGPT Answers Now Carry an Ad — LLM Pulse, 5 August 2026 (137,038 answers total, 36,153 from the US, 25 July-4 August): https://llmpulse.ai/blog/chatgpt-ads-study/
- Digiday, OpenAI builds offerings on consent as it expands ChatGPT ads to Europe — on the European consent architecture and Clara Westbrook’s objection: https://digiday.com/marketing/openai-builds-offerings-on-consent-as-it-expands-chatgpt-ads-to-europe/
- Digiday, ChatGPT ads land in U.K. as OpenAI outlines EU privacy rules — on the UK launch of 6 June 2026: https://digiday.com/marketing/chatgpt-ads-land-in-u-k-as-openai-outlines-eu-privacy-rules/
- Similarweb, 26% penetration on US desktop chats, via ppc.land: https://ppc.land/similarweb-opens-ai-ad-data-as-26-of-chatgpt-replies-carry-sponsored-ads/
- OpenAI, official documentation on formats, plans and user controls: https://help.openai.com/en/articles/20001207-ads-in-chatgpt-the-basics
- OpenAI Ads Platform, ChatGPT Ads Product Update, advertiser communication of 16 September 2026 — source for conversion optimisation, attribution windows, platform targeting, the Shopify and HubSpot integrations, text customisation and Sponsored Agents.
A note on sources and data
Statements attributed to OpenAI are drawn from the company’s public communications, from its communications to advertisers, and from the trade press listed under “Sources”. OpenAI’s product communications are promotional in nature: they are reported for what they state exists, not as an assessment of effectiveness. The figures on ad penetration and relevance belong to their respective authors — SE Ranking, Similarweb, OtterlyAI, LLM Pulse — have not been independently verified by ARvis, and refer to the United States market within the periods stated. ChatGPT and OpenAI are trademarks of their respective owners, cited descriptively.
The service is changing quickly: what is described here is current at the date of publication and may since have changed. This article is informational and does not constitute legal or compliance advice.
