OpenAI

GPTBot

Class: Training
robots.txt: Says it honours robots.txt; Disallowing GPTBot opts your content out of training.
Evidence: Confirmed from operator documentation; Source

Published User-Agent

Mozilla/5.0 AppleWebKit/537.36 (KHTML, like Gecko); compatible; GPTBot/1.4; +https://openai.com/gptbot

Proving it is real

robots.txt

User-agent: GPTBot
Disallow: /

Cloudflare custom rule expression

(http.user_agent contains "GPTBot")

nginx

if ($http_user_agent ~* "GPTBot") {
    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