OpenAI Walks Into Cannes and Changes the Conversation
For the first time in its history, OpenAI attended Cannes Lions, the world's largest advertising festival, in June 2026. The company did not arrive with a branded beach club or a Croisette rooftop party. Instead, OpenAI's Chief Revenue Officer Denise Dresser and Head of Global Ads Solutions Dave Dugan gathered a small group of reporters at a quiet outdoor patio and made a statement that will reshape B2B marketing budgets for the next decade.
"We are clearly in the advertising business now," Dresser said.
The numbers behind that declaration are extraordinary. ChatGPT now has more than 900 million weekly active users. Approximately 20% of the questions those users ask carry direct commercial intent, according to Dugan. An even broader set of queries are upper-funnel with commercial potential, meaning the addressable advertising opportunity is larger than the 20% figure alone suggests.
For context: Google Search processes approximately 8.5 billion queries per day. ChatGPT processes 2.5 billion queries per day, according to Omnibound research cited by Aspectus Group. The platform is not yet at Google's scale, but it is growing faster than any advertising channel in history, and it is growing into the most commercially valuable part of the buyer journey.
The Shift from Attention to Intelligence
Dugan's framing of the advertising opportunity is worth examining carefully, because it signals a fundamental change in how B2B advertising will be measured and optimized.
"Why does someone open the ChatGPT app?" he asked reporters. "They want to do research, they want to solve a problem, they want to get information on a particular topic. They're not coming to ChatGPT to scroll."
This is not a subtle distinction. The entire architecture of digital advertising since 2004 has been built on the attention economy: interrupt users mid-scroll, capture their attention, and redirect it toward a commercial outcome. OpenAI is proposing something structurally different. Dresser described it as moving from the attention economy to the intelligence economy, where the measure of advertising success is whether the ad helped the user accomplish something.
For B2B marketers, this framing is more familiar than it might appear. B2B buyers do not scroll for entertainment. They research vendors, compare solutions, build shortlists, and validate decisions. The intent profile of a B2B ChatGPT user is closer to a Google search user than a LinkedIn feed user. The difference is that ChatGPT delivers a synthesized answer rather than a list of links, which means the commercial opportunity is not a click but a recommendation.
What the ChatGPT Ads Product Actually Looks Like
OpenAI launched its ads pilot in the United States in February 2026. By June, the product had expanded to the United Kingdom, Canada, Australia, and New Zealand. The rollout timeline is worth noting: 19 weeks from launch to Cannes, with international expansion, an ads manager in beta, conversion tracking, and a shift from CPM-only to cost-per-click pricing, where CPC now accounts for the majority of spend on the platform.
The ad format is contextually placed sponsored content that sits separately from the model's main responses. OpenAI has been explicit that advertising will not influence the answers generated by the model itself. Ads appear as clearly labeled placements, and user conversation data is not shared with advertisers. This privacy architecture is deliberate: Dugan acknowledged that maintaining user trust is non-negotiable for the platform's long-term viability.
Approximately 2,000 brands now advertise on ChatGPT through Criteo, OpenAI's primary ad-tech partner. More than 80% of traffic from ChatGPT ads comes from mobile, according to MediaPost. Major holding groups including WPP, Omnicom, and Publicis Groupe are testing early formats and self-serve tools ahead of a wider rollout.
EMARKETER projects that ads in AI chatbots will generate less than $1 billion in revenue in 2026, approximately 3% of total AI advertising spending. That figure will grow rapidly. OpenAI has reportedly told investors it expects to reach $100 billion in advertising revenue within four years, a target that would make it the second-largest digital advertising platform in the world behind Google.
The B2B Buyer Journey Implication
The commercial intent data is the most strategically important number in OpenAI's Cannes pitch, and it deserves more than a passing mention in a marketing brief.
According to a June 2026 G2 report cited widely at Cannes, 50% of B2B software buyers now start their purchase journey in an AI chatbot such as ChatGPT or Gemini. Research by Averi.ai found that when 50 B2B SaaS queries were run through Google AI Mode, the system cited an average of 23 sources per answer, with the citation count climbing with buying intent. The implication is that AI-mediated research is not replacing human judgment; it is structuring the shortlist that human judgment then evaluates.
For B2B advertisers, this creates two parallel imperatives that must be managed simultaneously.
The first is organic AI citation authority. Before a B2B buyer sees a ChatGPT ad, they have likely already asked ChatGPT to explain the category, compare vendors, and identify the leading providers. If your brand is not cited in those organic responses, a paid placement later in the conversation is working against a headwind. Building organic AI citation authority through AEO and LLMO optimization is therefore a prerequisite for paid ChatGPT advertising to be effective.
The second is paid ChatGPT advertising readiness. The channel is 19 weeks old. Early movers in paid search in 2000 and paid social in 2008 captured disproportionate returns before competition inflated CPCs. The same dynamic will play out in ChatGPT advertising. B2B marketing leaders who test the channel now, build measurement infrastructure, and develop conversational ad creative will have a structural advantage when the platform reaches scale.
How ChatGPT Advertising Differs from Paid Search and Paid Social
Understanding what makes ChatGPT advertising structurally different from existing channels is essential for building an effective strategy.
In paid search, the user expresses intent through a keyword and receives a list of results. The advertiser competes for position in that list. The user then clicks through to a landing page where conversion happens. The entire architecture is built around the click as the primary value unit.
In paid social, the user is not expressing intent. The advertiser interrupts a passive consumption experience with creative designed to generate awareness, consideration, or conversion. The value unit is attention, measured by impressions, reach, and engagement.
ChatGPT advertising is neither. The user is in an active problem-solving mode, asking a specific question and expecting a synthesized answer. The advertiser's opportunity is to appear as a relevant, useful recommendation within that answer experience. The value unit is not a click or an impression but a recommendation, and the measurement framework is still being built.
Dugan described the creative opportunity in terms of scale: brands are no longer producing assets in the thousands but in the tens of thousands, across languages, audiences, formats, and platforms. OpenAI's Codex coding agent allows creative directors to build production workflows in natural language without writing code, which changes the economics of conversational ad creative production significantly.
What B2B Marketing Leaders Should Do Now
The strategic response to ChatGPT advertising is not a single decision but a sequence of actions that must be executed in the right order.
Step 1: Audit Your Current AI Visibility
Before investing in paid ChatGPT advertising, establish a baseline of your current organic AI citation rate. Run your primary B2B buyer queries through ChatGPT, Gemini, Perplexity, and Claude. Record which competitors are cited, which sources are referenced, and where your brand appears or does not appear. This audit takes approximately two hours and produces the most important data point in your current marketing intelligence stack.
Step 2: Build Organic AI Citation Authority First
If your brand is not being cited organically in AI responses to your category's core buying queries, paid advertising in ChatGPT will be less effective than it could be. The organic citation problem is solved through AEO and LLMO optimization: structured content that directly answers the questions buyers ask, published on a domain with sufficient authority, with schema markup that signals the content's relevance to AI systems. This is the foundation that makes paid ChatGPT advertising work.
Step 3: Request Early Access to ChatGPT Ads Manager
OpenAI's ads manager is currently in beta. B2B marketing leaders should request access now, even if they do not plan to activate campaigns immediately. Early access provides visibility into available targeting parameters, ad formats, measurement capabilities, and minimum spend thresholds. This intelligence is essential for budget planning and agency briefing.
Step 4: Develop Conversational Ad Creative
ChatGPT ad creative is fundamentally different from search ad copy or social creative. The format rewards usefulness over interruption. Early evidence suggests that ads which provide genuinely helpful information within the conversational context outperform traditional promotional messaging. B2B advertisers should develop creative that functions as a useful recommendation rather than a sales pitch.
Step 5: Build a Measurement Framework Before You Spend
The absence of a mature measurement framework is the primary reason most B2B marketing leaders are waiting to invest in ChatGPT advertising. This is a reasonable concern, but it is also a temporary one. OpenAI launched conversion tracking in Q1 2026 and has partnered with LiveRamp for measurement. B2B marketing leaders who build their attribution model now, connecting ChatGPT ad exposure to pipeline and revenue outcomes, will be positioned to scale spend confidently when the channel matures.
The Broader Context: AI Advertising Is Becoming Infrastructure
The OpenAI Cannes announcement does not exist in isolation. Amazon unveiled Alexa+ Agentic Ads at Cannes, a conversational advertising format that allows consumers to complete purchases without leaving the advertisement. Yahoo launched an Agent Network within its DSP connecting advertisers to 23 advertising technology partners. Warner Bros. Discovery is rebuilding its entire advertising technology stack around agentic AI.
The pattern is consistent: every major platform is rebuilding its advertising infrastructure around conversational AI. The attention economy that defined digital advertising for two decades is being replaced by an intelligence economy where the measure of advertising value is usefulness rather than interruption.
For B2B marketers, this transition is an opportunity rather than a threat, provided the response is strategic rather than reactive. The brands that build organic AI citation authority now, develop conversational ad creative, and establish measurement infrastructure before the channel reaches scale will capture the same disproportionate returns that early movers captured in paid search and paid social.
The window for that advantage is open. OpenAI's ads product is 19 weeks old. The channel is growing faster than any advertising platform in history. The question is not whether ChatGPT advertising will become a significant B2B marketing channel. The question is whether your brand will be positioned to compete when it does.
About the Author
Modi Elnadi is Founder and Director of Marketing and AI Growth at Integrated.Social, a London-based AI growth marketing agency. He specialises in PPC strategy, AEO and LLMO optimisation, agentic AI deployment, and B2B demand generation for technology and professional services clients. Modi has been tracking the evolution of AI advertising since OpenAI's first ad tests in early 2026 and advises B2B marketing leaders on building organic AI citation authority as the foundation for paid AI advertising effectiveness. Connect with Modi on LinkedIn or explore Integrated.Social's PPC and Performance Max services.
