Buchodi's Threat Intel personal blog

How ChatGPT serves ads

by @lmbbuchodi buchodi.com published 2026-04-283 min read

OpenAI's ad platform has two halves. On the ChatGPT side, the backend injects structured single_advertiser_ad_unit objects into the conversation SSE stream while the model is responding. On the merchant side, a tracking SDK called OAIQ runs in the visitor's browser and reports product views back

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