OpenAI has partnered with the ad-tech platforms Magnite and PubMatic to sell available advertising space in ChatGPT to advertisers. The platforms will run automated auctions and handle unsold inventory, while the financial terms and revenue split remain undisclosed. Advertising tests launched in the United States in February 2026 reached an annualized revenue run rate of about $100 million in March and $1 billion in August. As of October 21, 2026, ChatGPT ads were available in 89 countries and had attracted more than 100,000 advertisers, while premium subscriptions remain ad-free.
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