OpenAI

ChatGPT-User

Class: User fetch
robots.txt: May bypass robots.txt; OpenAI: robots.txt rules "may not apply" because a user started the request.
Evidence: Confirmed from operator documentation; Source

Published User-Agent

Mozilla/5.0 AppleWebKit/537.36 (KHTML, like Gecko); compatible; ChatGPT-User/1.0; +https://openai.com/bot

Proving it is real

robots.txt

User-agent: ChatGPT-User
Disallow: /

Cloudflare custom rule expression

(http.user_agent contains "ChatGPT-User")

nginx

if ($http_user_agent ~* "ChatGPT-User") {
    return 403;
}

Matching a name only blocks bots that tell the truth about it. Before you do this, read what each decision costs.

Last reviewed Nov 2, 2026