ChatGPT now knows what you do on other websites via ad collector

Global Tech Tue, 22 Sep 2026 15:12:38 GMT Moderate confidence — 64/100

OpenAI's ad collector at bzr.openai.com sets a cookie called __obi, scoped to .openai.com.
The value is while you are on ChatGPT and tied to your ChatGPT account.
__obi is then sent to OpenAI from ordinary websites you visit.

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OpenAI's ad collector at bzr.openai.com sets a cookie called __obi, scoped to .openai.com.
The value is while you are on ChatGPT and tied to your ChatGPT account.
__obi is then sent to OpenAI from ordinary websites you visit.

Sources: Buchodi