Every AI bot · OpenAI

ChatGPT-User

OpenAI's agent that fetches a page when someone asks its AI assistant about it.

In robots.txt: User-agent: ChatGPT-User

Named by5.7%of readable robots.txt files on the top 1M (34,242 of 600,979)

Of those, block it48.3%shut it out of the whole site (16,533 of 34,242)

Same sites, since CC-MAIN-2026-34+0.0 ptsshare of the same 394,690 sites that block it by name: 2.0% → 2.0%

Via Cloudflare's file2.1%of its blocks come from Cloudflare's ready-made robots.txt (341 of 16,533)

48.3%

24.1%

27.7%

Block the whole site: 16,533Block some paths: 8,240Name it but allow it: 9,469

Every robots.txt file on the top 1M that names ChatGPT-User, by what the rules that apply to it say.

OpenAI's other bots

Sites often treat one company's bots differently, depending on what each is for.

Bot	Purpose	Files naming it	Of those, block it
GPTBot	Collects pages to train AI	78,270	71.9%
OAI-SearchBot	Builds an AI search index	23,100	25.7%

Who does what

The highest-ranked sites on the top million in each group. Click one to see its whole robots.txt verdict.

Block it

Block some paths

Name it and allow it

Lists skip sites we don't showcase (adult content).

What this means for you: blocking ChatGPT-User asks OpenAI's assistant not to fetch your pages when someone asks about them. Decide each bot on what it's for, not who runs it.