ChatGPT Ads Threaten Google's Search Empire With a New 'Conversational Intent' Model

OpenAI's nascent advertising business is showing early signs of being a fundamentally different — and potentially more powerful — monetization model than Google's keyword-driven search ads. New data from Similarweb executive Harel Amir, who analyzed early ChatGPT campaigns from brands including HubSpot, Dick's Sporting Goods, Nordstrom, Cursor, and Indeed, suggests the platform is unlocking a layer of commercial behavior that traditional search engines routinely miss.

The core difference is what Amir calls 'conversational intent' versus keyword intent. Google captures buying signals only after a user explicitly types a commercially loaded phrase. ChatGPT infers intent from the arc of an entire dialogue — even when the user never mentions a product category. A striking 46% of ChatGPT users who eventually saw an ad began their session with zero commercial intent; the conversation itself generated the buying interest. Amir labels this dynamic 'intent drift.' In one documented example, a user asked ChatGPT for job-interview prep help, went back and forth 30 times, and was then served an Indeed ad. Another user researching golf clubs had a 10-turn exchange before a Dick's Sporting Goods ad appeared. A third, asking about U.S. acid-oil exports across 52 conversation turns, was ultimately shown a HubSpot ad.

The format is structurally exclusive in a way Google Search is not. Rather than a cluttered results page with competing sponsored links, ChatGPT currently surfaces a single ad per conversational turn — no side rail, no competing cards. That scarcity is already commanding premium pricing: Similarweb estimates ChatGPT ads carry a CPM of roughly $60, well above Meta and LinkedIn rates, and a cost-per-click of around $12, higher than Google Search. Critically, 83% of the queries triggering ChatGPT ads would never have activated a traditional Google Shopping ad at all, meaning OpenAI is monetizing an entirely new stratum of user behavior.

Early engagement data is also outperforming skeptics' expectations. The average click-through rate sits around 0.68% — between display and search norms — but the best-performing campaign Amir observed hit a 5.4% CTR, topping Google Search averages and rivaling top social-media benchmarks. More telling: 73% of users continue the conversation after seeing an ad, with chats running an average of four additional turns post-ad. Advertisers are reporting that the quality of clicks from ChatGPT outperforms those from social platforms, even where raw CTR lags. The data collectively challenge the assumption that ads would degrade the ChatGPT experience — so far, users appear to treat them as contextual recommendations rather than interruptions. Whether OpenAI can maintain that balance as it scales the ad business remains the central open question.