Rattlesnakes By Mail

GoogleOther vs GPTBot

GoogleOther and GPTBot compared on 11 documented fields, from 17 claims, last verified 2026-09-15.

Field	GoogleOther	GPTBot	Comparison
honours_crawl_delay	no	not_documented	different
observed_fetches_robots_txt	no	not documented	different
observed_requested_mcp_endpoint	yes	not documented	different
publishes_ip_list	yes	yes	same
purpose_documented	mixed	training	different
respects_robots_txt	yes	yes	same
robots_txt_fetch_marker	not documented	yes	different
robots_txt_token	GoogleOther	not documented	different
separate_search_and_training_tokens	not_documented	yes	different
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	yes	not_documented	different

Differences

Field	GoogleOther statement	GPTBot statement
honours_crawl_delay	Google does not support the robots.txt Crawl-delay directive for GoogleOther.	OpenAI does not publish whether GPTBot honours the robots.txt Crawl-delay directive.
observed_fetches_robots_txt	GoogleOther made 93 requests to Rattlesnakes By Mail between 2026-09-13T20:00Z and 2026-09-15T09:00Z and fetched /robots.txt on none of those requests. GoogleOther's first request to Rattlesnakes By Mail was the home page at 2026-09-14T12:03:30Z.	not documented
observed_requested_mcp_endpoint	GoogleOther requested the /mcp endpoint of Rattlesnakes By Mail twice between 2026-09-13T20:00Z and 2026-09-15T09:00Z, at 2026-09-14T15:07:30Z and at 2026-09-14T18:27:49Z. Rattlesnakes By Mail returned status 405 to both GoogleOther requests for /mcp.	not documented
purpose_documented	GoogleOther is a generic crawler that Google product teams use to fetch publicly accessible content from sites.	GPTBot crawls content that may be used to train OpenAI generative AI foundation models.
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.
robots_txt_token	The robots.txt token for GoogleOther is GoogleOther.	not documented
separate_search_and_training_tokens	Google does not document whether content fetched by GoogleOther is used for Gemini training.	OpenAI separates search and training controls into two robots.txt tokens: OAI-SearchBot for search and GPTBot for training.
user_agent_string_full	not documented	GPTBot sends the user agent string Mozilla/5.0 AppleWebKit/537.36 (KHTML, like Gecko); compatible; GPTBot/1.4; +https://openai.com/gptbot.
verifiable_by_rdns	GoogleOther requests are verifiable by reverse DNS lookup resolving to googlebot.com, google.com, or googleusercontent.com.	OpenAI does not publish a reverse-DNS verification method for GPTBot.

Sources