OpenAI has spent the last year quietly building an advertising business. Amazon just handed it a rocket ship.
On September 10, Amazon announced a partnership with OpenAI that allows select U.S. brands advertising through Amazon Ads, including its Demand-Side Platform, to run campaigns directly inside ChatGPT. Ads appear as designated text or image units placed below ChatGPT responses, putting commercial messages in front of one of the most engaged audiences on the internet.
OpenAI’s ad business had already reached a $1 billion annualized revenue run rate before Amazon entered the picture.
How this actually works
Amazon’s DSP is one of the largest programmatic advertising platforms in the world, connecting brands to audiences across a vast network of publishers and owned properties. By plugging ChatGPT into that infrastructure, Amazon gives its existing advertiser base a direct channel to OpenAI’s user base, which stood at approximately 900 million weekly active users as of early 2026.
ChatGPT users are not passively scrolling a feed. They are actively asking questions, researching products, and making decisions. During Prime Day 2026, AI-referred shoppers converted at a rate 40% higher than shoppers arriving through other channels.
OpenAI began testing sponsored placements inside ChatGPT for U.S. users in February 2026, with early retail partners including Best Buy and Williams-Sonoma. Those initial tests gave OpenAI the data it needed to build a credible pitch to larger advertising partners. Amazon is the biggest one yet.
Why Amazon made this move
Amazon’s advertising segment has become one of its most important businesses, growing faster than AWS at certain points. But the competitive landscape for digital advertising is shifting as AI assistants increasingly absorb the question-asking behavior that search engines were built on.
By embedding its advertiser relationships inside ChatGPT now, Amazon secures early positioning in the AI-native advertising ecosystem. It also gives Amazon Ads a differentiator that neither Google nor Meta can currently match, because neither has a comparable distribution deal with the dominant consumer AI product.
For OpenAI specifically, Amazon’s advertiser base solves a real problem. Building a direct sales force to court thousands of individual brands is expensive and slow. Plugging into Amazon’s existing infrastructure compresses that timeline dramatically, letting OpenAI scale its ad revenue without proportionally scaling its sales overhead.
What this means for the broader ad market
Microsoft has been integrating ads into Copilot. Google is threading its own ad products into AI Overviews. Perplexity has been courting advertisers directly. The Amazon-OpenAI partnership is the clearest signal yet that the category is graduating from experiment to infrastructure.
The format itself, text or image units appearing below ChatGPT responses, is deliberately unobtrusive. OpenAI has positioned these placements as contextually relevant and distinct from core AI responses, using separate targeting data outside of personal conversation histories.
Regulators are also watching. AI-generated responses carrying sponsored content raise transparency questions that traditional digital advertising never had to answer quite so directly. When a chatbot recommends a product and that recommendation is adjacent to a paid placement, the line between organic and commercial can blur in ways that invite scrutiny.
With Amazon’s distribution behind it, OpenAI’s $1 billion annualized run rate has a clear path upward.