Author: Frederik Hyldig Garoussian, CPO · Last updated: September 2026
ChatGPT Ads went live in 31 European markets on 24 August, adding the Nordics, the Netherlands, and the rest of the EEA to a UK market that already had ads. Self-service access followed a week later.
A lot of first tests are running right now, and soon plenty of people will be willing to tell you what the channel is worth. Almost none of those verdicts will matter because almost everyone is reaching for the wrong measuring stick. That makes for a duller headline than most of what you will read, but it is closer to the truth.
The European rollout was communicated in a way that caused some confusion.
At the European launch, buying ChatGPT Ads meant going through OpenAI’s own Ads Solutions team, a short list of named agency partners, or technology partners. Self-service was promised for “later this summer” with no date. It arrived on 31 August, a week later. A fair number of advertisers and agencies still assume access runs through that original handful of partners, and it doesn’t. Any advertiser can open an account, with no minimum budget.
When ChatGPT started citing sources and sending the occasional click, the knee-jerk reaction was to open Google Analytics, look at referral traffic from chatgpt.com, find it below 1% of total traffic, and conclude that LLM visibility was worth nothing.
The traffic number was right. The conclusion wasn’t, because hardly anyone clicks a link in an LLM answer. They read it, then Google the brand or type the URL, and GA4 credits organic or direct as the traffic source. Google added an “AI Assistant” channel in GA4 in May 2026, which makes that traffic easier to find but changes nothing about the attribution. The click was never where the value landed, so counting clicks produced a confident answer to a question nobody had asked.
You can make the same mistaken conclusion in paid form if you mistake what kind of placement this is.
A search ad works because someone typed an intent and an advertiser bid on it. It is almost navigational. Clicks, CPC and conversions are the right instruments for that. A YouTube pre-roll is judged differently. Nobody sensible evaluates a video ad on CPC, because everyone accepts that most of what it does happens without a click.
Some of the price is due to short-term scarcity which, will likely change. SE Ranking found ads on 25.94% of commercial prompts in the US, so roughly three quarters of commercial conversations carried no ad at all. Thin inventory raises prices on its own and says little about pricing once coverage doubles.
Per OpenAI’s own help centre, “personalized ads are not initially available in the European Economic Area (EEA) or Switzerland.” In those markets, an ad is selected from what the user is discussing in the current chat thread, plus basic context such as general location or language. Past chats and memory are explicitly excluded, and the notification OpenAI sent European users on 15 August put it plainly: to begin with, ads will not be personalised beyond the current chat.
When personalisation is switched on, the signals are different. OpenAI lists past chats and memory, and how the user interacts with ads, alongside the current thread. That is the version people have been describing, in which a request for weekend plans can return an ad for the office chair someone was comparing last week.
Which means most of the numbers circulating now measure a system European advertisers cannot buy. The widely quoted SE Ranking study, which tested 50,006 commercial prompts across 20 US niches on 23 July and found 14.35% of ads no more topically related to their own prompt than to a random one, was measuring the personalised American product. Useful reading, but results may differ.
Banner blindness on ChatGPT is close to zero today, and it won’t stay that way. Right now everyone is eager to spot their own ads in the wild for the first time. OpenAI describes personalisation as not initially available in Europe rather than unavailable. The product may change shape.
The bottom line is that, as with many other things related to AI, it can be hard to foresee how things will change when they move so fast. Concluding too early is a mistake.
None of this argues for sitting it out, or for spending more. The useful position is not a view on whether ChatGPT Ads works. Most of the verdicts landing in the next weeks and months will describe their author’s measurement setup and mindset rather than the channel.
Instead, it argues for designing a test to teach you something, even if it won’t be a final verdict.
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