OpenAI Tests Multi-Advertiser Ads in ChatGPT

OpenAI is testing a new way to show multiple advertisers within a single sponsored unit in ChatGPT. This new format groups relevant ads together, rather than displaying just one advertiser per placement. What's interesting is this expands the ad inventory without increasing the number of ads a user sees. This early test is limited to a small subset of ads. ChatGPT started carrying ads in February 2026, appearing only on the Free and Go plans. Paid tiers remain ad-free. Ads show up as a single labeled sponsored unit below a response, separate from the answer. They only appear when the chat topic matches an available advertiser. OpenAI says these ads run on separate systems and do not influence ChatGPT's answers. Eligible ads within these multi-advertiser units are priced through a second-price auction, a system already in use for ChatGPT ads. This means more competition per slot for OpenAI without a heavier ad load for users. This matters because OpenAI is adopting familiar ad platform mechanics, which could make advertising on ChatGPT more accessible and efficient for businesses.