ChatGPT ads are getting easier to buy. The first sales data says CPG brands should fund the organic answer first

Two things happened in the last week that every CPG ecommerce lead will hear about in their next agency meeting. On November 2, EMARKETER reported, citing The Information, that OpenAI signed Magnite and PubMatic to help sell ChatGPT ad space through tools buyers already use. And Google is testing a layout in AI Mode that puts paid products under a “Sponsored” heading, ahead of unpaid ones under “All products.”

The paid AI shelf is getting easier to buy. Before you move budget, look at the first independent sales data on what those clicks return. It makes a strong case for funding the organic answer first.

What did the new ChatGPT ads study find?#

Maximilian Kaiser (Vienna University of Economics and Business) and Christian Schulze (Frankfurt School of Finance & Management) published a working paper, “Can Advertising Fund Free AI?”, dated October 2026 and still under review. They used Google Analytics 4 ecommerce data from 1,898 online shops over 60 weeks (June 29, 2025 to August 22, 2026), with the EU, where ChatGPT ads had not yet launched, as the control group.

The headline from the paid side: in US traffic, a visit from a paid ChatGPT ad generated $0.89 in revenue, against $2.45 for a paid Google search visit. Paid ChatGPT visitors converted at 0.37% versus 1.17%. Of the 87 advertisers buying both channels in US traffic, 73 recorded no paid ChatGPT sale at all across 18,726 paid visits. Fourteen sites carried all 570 purchases.

An unpaid referral from a ChatGPT answer was worth $3.27 per visit in US traffic, the highest of the five channels measured. The paid card under the answer was the lowest. Same assistant, a gap of more than 3.5x.

A few caveats. It is a working paper, not yet peer reviewed, and the paid-side numbers are descriptive, not causal. These are pooled totals across the 102 sites with full sales tracking, not adjusted for which sites sell what. And the paid panel is not a CPG panel: services, software, education and finance make up about half of it, per PPC Land’s write-up. The within-site comparisons, which do adjust for website, device and week, still show paid ChatGPT converting worse than paid search. Treat it as an early read, not a verdict on your category.

Why does the organic answer matter more than the ad?#

Because the ad does not buy the recommendation. OpenAI’s October 21 post says ads in ChatGPT are “clearly labeled and separate from ChatGPT’s answers, and advertising does not influence the answers ChatGPT provides.” The shopper reads the answer first. Your sponsored card sits underneath it, possibly next to a competitor the answer just praised.

The study also found that the ad launch coincided with an estimated 6% to 8% drop in organic ChatGPT referrals to shops (a range across assumptions, not a precise interval), while the visitors who still came converted at the same rate. The free shelf got a little smaller and stayed just as valuable.

If ChatGPT names your protein bar when someone asks for a high-protein snack without sugar alcohols, you get the best-converting traffic in the study for free. If it names someone else, an ad underneath is the most expensive way to argue with the answer. We covered what decides that answer in how ChatGPT ranks merchants and how it shortlists brands before it searches.

What is Google testing with sponsored products in AI Mode?#

Search Engine Watch spotted the test on October 28. Google confirmed to Search Engine Land that it is an experiment. In the examples PPC Land walked through, a single “Sponsored” heading covers the paid cards, an “All products” heading covers the unpaid ones, and the paid cards sit in the leftmost positions. In one carousel, only one unpaid product was visible before the scroll arrow.

That matters more in AI Mode than in classic search because there are fewer slots. PPC Land cites a Productrise study of more than 100,000 queries in July: AI Mode showed products on about 23% of queries versus 88% in standard search, averaging 4.3 listings against 22.5.

Google’s own line, in its October 28 post, is that click-through rates are “already similar between sponsored and organic product list items within AI Mode.” It also launched multiturn ads in the US, so ads can appear on follow-up questions. The catch: Google Ads offers no way to segment delivery in AI Mode, as PPC Land notes. You can’t see which prompts you showed up on.

Should CPG brands buy ChatGPT ads now?#

Test, yes. Shift real budget, not yet. Buyers are not convinced either: EMARKETER cites Bank of America data that only 6% of advertisers think ChatGPT is lifting return on ad spend fast enough to justify new spending, against 33% for Google Search. It also notes, per Adweek, that ChatGPT still lacks search- and prompt-level reporting.

If you test, set your bid ceiling from your own numbers. The paper’s “parity price” is simple: take ChatGPT ad revenue per visit, divide by paid search revenue per visit, and multiply by your search cost per click. That is the most a ChatGPT click is worth at your search return. With the study’s US figures and a $0.72 median search click, parity is about $0.26. The largest publicly known account paid $1.72. OpenAI recommends starting bids of $3 to $5, per Search Engine Journal. Plug in yours:

Before you trust the math, filter out OpenAI’s ad-review crawler, which SEJ notes can hit landing pages with tracking parameters and get counted as paid visits. And if most of your volume sells through Walmart, Amazon or Target, a click to your own site is a different test from a click to a retailer page.

What should CPG brands do this quarter?#

1. Fund the answer before the ad slot. Clean product data, consistent maker and brand names, and review language that matches what shoppers ask.
2. Measure the organic shelf weekly. Track how often ChatGPT, Gemini and AI Mode name you for the prompts that matter, your AI share of voice. Neither OpenAI nor Google reports this for you.
3. Cap AI ad tests at your parity price. Small budget, fixed window.
4. Watch where you land in AI Mode carousels. If sponsored cards push “All products” off the first screen in your category, that changes the math on Shopping ads there.
5. Keep retail media in the same conversation. OpenAI is building buying paths through Amazon Ads, Criteo and now Magnite and PubMatic, per EMARKETER. Retail ad growth is already outpacing sales at Walmart, as our Xenalytics replica on Walmart shows.

Our take: paid AI placements may improve as formats and reporting mature. Right now, though, the organic answer is the asset and the ad is the experiment. If you want to see where your SKUs stand in the answers today, run a free audit or book a demo. Or see how SearchPanel scores AI visibility per product.