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user agent string full across crawlers

user agent string full across 12 crawlers from 6 vendors, from 12 claims, last verified 2026-09-14.

How the crawlers answer this one question, counted by answer. Every answer links to the vendor quote behind it.

User agent string fullUser agent string full. not documented is the largest with 4 crawlers, out of 16 crawlers in total.not documented: 4 crawlersnot documented4not_documented: 3 crawlersnot_documented3Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/605.1.15 (KHTML, like Gecko) Version/17.4 Safari/605.1.15 (Applebot/0.1; +http://www.apple.com/go/applebot): 1 crawlerMozilla/5.0 (Macintosh; In…1Mozilla/5.0 AppleWebKit/537.36 (KHTML, like Gecko); compatible; ChatGPT-User/1.0; +https://openai.com/bot: 1 crawlerMozilla/5.0 AppleWebKit/53…1Mozilla/5.0 AppleWebKit/537.36 (KHTML, like Gecko; compatible; Googlebot/2.1; +http://www.google.com/bot.html): 1 crawlerMozilla/5.0 AppleWebKit/53…1Mozilla/5.0 AppleWebKit/537.36 (KHTML, like Gecko); compatible; GPTBot/1.4; +https://openai.com/gptbot: 1 crawlerMozilla/5.0 AppleWebKit/53…1Mozilla/5.0 AppleWebKit/537.36 (KHTML, like Gecko); compatible; OAI-AdsBot/1.0; +https://openai.com/adsbot: 1 crawlerMozilla/5.0 AppleWebKit/53…1Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/131.0.0.0 Safari/537.36; compatible; OAI-SearchBot/1.4; +https://openai.com/searchbot: 1 crawlerMozilla/5.0 (Macintosh; In…1Mozilla/5.0 AppleWebKit/537.36 (KHTML, like Gecko; compatible; Perplexity-User/1.0; +https://perplexity.ai/perplexity-user): 1 crawlerMozilla/5.0 AppleWebKit/53…1Mozilla/5.0 AppleWebKit/537.36 (KHTML, like Gecko; compatible; PerplexityBot/1.0; +https://perplexity.ai/perplexitybot): 1 crawlerMozilla/5.0 AppleWebKit/53…1Mozilla/5.0 (compatible; bingbot/2.0; +http://www.bing.com/bingbot.htm): 1 crawlerMozilla/5.0 (compatible; b…1
User agent string full. not documented is the largest with 4 crawlers, out of 16 crawlers in total. Source: each vendor's own crawler documentation, quoted and dated on every claim page.
CrawlerVendorValueMethodVerifiedClaim
ApplebotAppleMozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/605.1.15 (KHTML, like Gecko) Version/17.4 Safari/605.1.15 (Applebot/0.1; +http://www.apple.com/go/applebot)vendor_doc2026-09-13claim 17
BingbotMicrosoftMozilla/5.0 (compatible; bingbot/2.0; +http://www.bing.com/bingbot.htm)vendor_doc2026-09-14claim 129
ChatGPT-UserOpenAIMozilla/5.0 AppleWebKit/537.36 (KHTML, like Gecko); compatible; ChatGPT-User/1.0; +https://openai.com/botvendor_doc2026-09-13claim 27
Claude-SearchBotAnthropicnot_documentedvendor_doc2026-09-13claim 36
Claude-UserAnthropicnot_documentedvendor_doc2026-09-13claim 46
ClaudeBotAnthropicnot_documentedvendor_doc2026-09-13claim 54
GooglebotGoogleMozilla/5.0 AppleWebKit/537.36 (KHTML, like Gecko; compatible; Googlebot/2.1; +http://www.google.com/bot.html)vendor_doc2026-09-13claim 70
GPTBotOpenAIMozilla/5.0 AppleWebKit/537.36 (KHTML, like Gecko); compatible; GPTBot/1.4; +https://openai.com/gptbotvendor_doc2026-09-13claim 84
OAI-AdsBotOpenAIMozilla/5.0 AppleWebKit/537.36 (KHTML, like Gecko); compatible; OAI-AdsBot/1.0; +https://openai.com/adsbotvendor_doc2026-09-13claim 92
OAI-SearchBotOpenAIMozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/131.0.0.0 Safari/537.36; compatible; OAI-SearchBot/1.4; +https://openai.com/searchbotvendor_doc2026-09-13claim 102
Perplexity-UserPerplexityMozilla/5.0 AppleWebKit/537.36 (KHTML, like Gecko; compatible; Perplexity-User/1.0; +https://perplexity.ai/perplexity-user)vendor_doc2026-09-13claim 111
PerplexityBotPerplexityMozilla/5.0 AppleWebKit/537.36 (KHTML, like Gecko; compatible; PerplexityBot/1.0; +https://perplexity.ai/perplexitybot)vendor_doc2026-09-13claim 120

Not documented

CrawlerVendor
Applebot-ExtendedApple
Google-ExtendedGoogle
GoogleOtherGoogle
ReflectionbotReflection AI

Sources

Source
https://support.apple.com/en-us/119829
https://developers.openai.com/api/docs/bots
https://support.claude.com/en/articles/8896518-does-anthropic-crawl-content-from-the-web-and-how-can-site-owners-block-the-crawler
https://developers.google.com/search/docs/crawling-indexing/google-common-crawlers
https://docs.perplexity.ai/docs/resources/perplexity-crawlers
https://www.bing.com/webmasters/help/which-crawlers-does-bing-use-8c184ec0