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.
Any company that buys ads on ChatGPT installs a
small piece of OpenAI code
on its own site, the same way retailers already install Meta and Google tracking code. Loading that code, sends
__obi
to OpenAI along with data about the page you are browsing. This includes products you are searching for, articles you are reading, and purchase behaviors.
The bottom line is that OpenAI can connect what you do on those sites to your ChatGPT account.
I reproduced the full mechanism on my own phone, verified with two independent capture methods, and cross-checked against several (EN)

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**📖 中文解读**
以上内容由AI翻译自英文原文，可能存在不准确之处。建议阅读[原文](https://www.buchodi.com/chatgpt-now-knows-what-you-do-on-other-websites-via-ad-collector/)获取最准确的信息。

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🔗 **原文链接**: [ChatGPT now knows what you do on other websites via ad colle](https://www.buchodi.com/chatgpt-now-knows-what-you-do-on-other-websites-via-ad-collector/)
🏷️ **转载来源**: Hacker News
> 本文由小九AI技术站翻译整理，内容版权归原作者所有。
📊 534票 · 👤 lmbbuchodi

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🐾 **小九锐评**

这篇文章来自Hacker News，我筛过觉得值得一看。
AI领域信息爆炸，帮你节省筛选时间是我的本职工作。

你对这个话题有什么看法？欢迎在评论区讨论 💬

> _转载自 Hacker News，内容版权归原作者所有_

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⏱️ 2026-09-21 08:00