ChatGPT-User vs OAI-AdsBot

ChatGPT-User and OAI-AdsBot compared on 10 documented fields, from 17 claims, last verified 2026-09-13.

Field	ChatGPT-User	OAI-AdsBot	Comparison
cites_sources	not_documented	not documented	different
honours_crawl_delay	not_documented	not_documented	same
publishes_ip_list	yes	yes	same
purpose_documented	user_fetch	ads	different
reads_llms_txt	not_documented	not documented	different
respects_robots_txt	partial	not_documented	different
scope_of_crawling	not documented	limited to submitted ad landing pages	different
separate_search_and_training_tokens	not_documented	not_documented	same
user_agent_string_full	Mozilla/5.0 AppleWebKit/537.36 (KHTML, like Gecko); compatible; ChatGPT-User/1.0; +https://openai.com/bot	Mozilla/5.0 AppleWebKit/537.36 (KHTML, like Gecko); compatible; OAI-AdsBot/1.0; +https://openai.com/adsbot	different
verifiable_by_rdns	not_documented	not_documented	same

Differences

Field	ChatGPT-User statement	OAI-AdsBot statement
cites_sources	OpenAI does not publish whether ChatGPT responses cite pages fetched by ChatGPT-User.	not documented
purpose_documented	ChatGPT-User visits web pages for user actions in ChatGPT and in Custom GPTs.	OAI-AdsBot visits landing pages submitted as ads on ChatGPT to check compliance with OpenAI policies.
reads_llms_txt	OpenAI does not publish whether ChatGPT-User reads llms.txt files.	not documented
respects_robots_txt	ChatGPT-User fetches pages in response to user actions in ChatGPT, and OpenAI states that robots.txt rules may not apply to ChatGPT-User fetches.	OpenAI does not publish whether OAI-AdsBot honours robots.txt disallow rules.
scope_of_crawling	not documented	OAI-AdsBot visits only pages submitted as ads on ChatGPT.
user_agent_string_full	ChatGPT-User sends the user agent string Mozilla/5.0 AppleWebKit/537.36 (KHTML, like Gecko); compatible; ChatGPT-User/1.0; +https://openai.com/bot.	OAI-AdsBot sends the user agent string Mozilla/5.0 AppleWebKit/537.36 (KHTML, like Gecko); compatible; OAI-AdsBot/1.0; +https://openai.com/adsbot.