Claude-SearchBot vs GPTBot

Claude-SearchBot and GPTBot compared on 10 documented fields, from 17 claims, last verified 2026-09-13.

Field	Claude-SearchBot	GPTBot	Comparison
cites_sources	not_documented	not documented	different
honours_crawl_delay	yes	not_documented	different
publishes_ip_list	yes	yes	same
purpose_documented	search	training	different
reads_llms_txt	not_documented	not documented	different
respects_robots_txt	yes	yes	same
robots_txt_fetch_marker	not documented	yes	different
separate_search_and_training_tokens	yes	yes	same
user_agent_string_full	not_documented	Mozilla/5.0 AppleWebKit/537.36 (KHTML, like Gecko); compatible; GPTBot/1.4; +https://openai.com/gptbot	different
verifiable_by_rdns	not_documented	not_documented	same

Differences

Field	Claude-SearchBot statement	GPTBot statement
cites_sources	Anthropic does not publish whether Claude search responses cite pages crawled by Claude-SearchBot.	not documented
honours_crawl_delay	Claude-SearchBot respects the Crawl-delay directive in robots.txt when crawling domains.	OpenAI does not publish whether GPTBot honours the robots.txt Crawl-delay directive.
purpose_documented	Claude-SearchBot analyses online content to improve the relevance and accuracy of Claude search responses.	GPTBot crawls content that may be used to train OpenAI generative AI foundation models.
reads_llms_txt	Anthropic does not publish whether Claude-SearchBot reads llms.txt files.	not documented
robots_txt_fetch_marker	not documented	OpenAI may add a robots.txt marker to the GPTBot user agent string when GPTBot fetches robots.txt files.
user_agent_string_full	Anthropic does not publish a full user agent string for Claude-SearchBot.	GPTBot sends the user agent string Mozilla/5.0 AppleWebKit/537.36 (KHTML, like Gecko); compatible; GPTBot/1.4; +https://openai.com/gptbot.