Hundreds of brands have bought into ChatGPT's ad product since its launch in early 2026 — but almost none expect it to move holiday sales in a meaningful way this season.

That is the core tension heading into the fourth quarter. OpenAI's advertising capabilities have rapidly become a hot new channel for marketers eager to reach high-intent users of AI-driven search. Yet the brands spending there describe a platform still in its infancy, better suited to cautious experimentation than to carrying a share of the busiest retail quarter of the year.

Why are advertisers holding back?

The obstacles are practical rather than conceptual. According to the brands assessing the channel:

• Cost-per-click rates are expensive, eating into budgets before returns are proven.
• Sales attribution remains unproven, with no consistent evidence that ChatGPT ads convert users into shoppers.
• AI assistants are still establishing trust as a source for product recommendations.
• Q4 is the wrong time to experiment, because brands cannot afford to risk blowing ad budgets during the peak sales window.

The combined effect: advertisers still largely view ChatGPT as a costly testing ground rather than a dependable channel, especially when measured against tried-and-true players like Meta and Google.

What does that mean for the holiday quarter?

The expectations gap is stark. Brands are betting on OpenAI's ability to reach a high-intent user base — the profile most likely to convert into shoppers — yet they are not structuring their holiday plans around that bet. Established platforms with proven performance records will absorb the seasonal spend.

This is not a verdict on AI search advertising as a category. The initial wave of excitement since the early-2026 launch shows genuine advertiser appetite for the channel. What it shows instead is a sequencing problem: brands want proof of sales before they shift real budget, and the platform has not yet delivered that proof at scale.

The so-what for marketers is straightforward. ChatGPT advertising will not be a meaningful holiday sales driver this year, and any brand allocating Q4 budget there should treat the spend as research, not revenue. The real test arrives after the season, when early performance data either justifies larger commitments or confirms that AI platform ads remain an expensive experiment.