September 20, 2026
OpenAI now tracks your purchases after ChatGPT: pixel found on 1029 hostnames
Collection is enabled by default and can be turned off in two minutes in settings.
ChatGPT gives the browser a one-year tag and uses it to recognize what you bought after talking to it.
Advertising at OpenAI is no longer a plan. The pixel is not only in the docs: on 20.09.2026 it was found 936 times across 1029 hostnames.
How the tag is set. ChatGPT issues a single-use token for 60 seconds and exchanges it for a third-party `__obi` cookie with a lifetime of 365 days. This does not work in Safari: the browser blocks third-party cookies entirely.
Collection used to be broader. SDK version 0.1.31 collected names and location data; on 27 August 2026, the scope of collection was narrowed. On the advertiser side, the pixel still writes its own cookies for 30 and 365 days, and with automatic matching enabled, adds hashes of buyer data to the event.
Turned off in two minutes. In ChatGPT, this is Settings → Data Controls → Marketing Privacy, and in Ads controls, uncheck Personalize ads. Everything is enabled by default. A filter in uBlock Origin or DNS blocks two OpenAI domains, bzr.openai.com and bzrcdn.openai.com, after which collection drops but does not stop.
In OpenAI’s cookie policy, `__obi` is listed as an analytics cookie with a one-year lifetime. On 14 September, the company received two questions about why the tag is analytical and where user consent is. Support promised to pass the observations along internally and answered neither.
OpenAI’s advertising dashboard is already live: Ads Manager provides the pixel’s pixelId.
