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OpenAIChecked 29 Oct 2026

ChatGPT-User

Opens a page when someone asks ChatGPT, or a custom GPT, about it.

Run by
OpenAI
Used for
When a user asks
Follows robots.txt
Not always
Shut out by
8% of top websites

What blocking it changes

It may still open a page a user asks for. It does not decide whether a site appears in ChatGPT search: OAI-SearchBot does.

"Because these actions are initiated by a user, robots.txt rules may not apply."

OpenAI, read 29 Oct 2026
Figure 1How many shut out ChatGPT-User while letting Googlebot in
Most visited websites8%52 of 669
S&P 500 companies0%2 of 410
From our two studies of 29 October 2026: the 669 most visited websites and the 410 S&P 500 companies whose robots.txt we could read. 97 of the websites and 33 of the companies name ChatGPT-User in the file. The website study, the S&P 500 study.

The lines to copy

To shut it out
User-agent: ChatGPT-User
Disallow: /
To let it in
User-agent: ChatGPT-User
Allow: /

A crawler follows only the lines under the User-agent line that names it, and the lines under User-agent: * only when no line names it. So lines for one crawler do not change the rules for the others.

OpenAI publishes the addresses it crawls from, so a request can be checked against them: the list.

More from OpenAI

  • GPTBot Collects pages that may be used to train OpenAI's AI models.
  • OAI-SearchBot Finds the pages that ChatGPT search can show and link to.