OpenAI Adds Magnite and PubMatic to ChatGPT Ad Sales

Nov 5, 2026
OpenAI signed deals with Magnite and PubMatic that let advertisers buy available ChatGPT ad inventory through their existing software.

OpenAI signed deals with Magnite and PubMatic to fill unused ChatGPT ad space, sources told The Information, eMarketer reported on November 2, 2026. Advertisers can use the companies' software to set budgets, submit bids, and upload ads.

OpenAI retains control over final ad delivery and placement. Initial transaction volumes are still small, but both companies expect fast growth, the sources said.

The agreements add Magnite and PubMatic to OpenAI's existing advertising partners, which include Amazon Ads, Criteo, LiveRamp, and StackAdapt. The integrations let advertisers manage ChatGPT campaigns through software they already use for other advertising channels.

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