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robots token differs from ua across crawlers

robots token differs from ua across 2 crawlers from 2 vendors, from 2 claims, last verified 2026-09-13.

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

Robots token differs from uaRobots token differs from ua. not documented is the largest with 13 crawlers, out of 15 crawlers in total.not documented: 13 crawlersnot documented13yes: 2 crawlersyes2
Robots token differs from ua. not documented is the largest with 13 crawlers, out of 15 crawlers in total. Source: each vendor's own crawler documentation, quoted and dated on every claim page.
CrawlerVendorValueMethodVerifiedClaim
Applebot-ExtendedAppleyesvendor_doc2026-09-13claim 8
Google-ExtendedGoogleyesvendor_doc2026-09-13claim 62

Not documented

CrawlerVendor
Claude-SearchBotAnthropic
Claude-UserAnthropic
ClaudeBotAnthropic
ApplebotApple
GoogleOtherGoogle
GooglebotGoogle
BingbotMicrosoft
ChatGPT-UserOpenAI
GPTBotOpenAI
OAI-AdsBotOpenAI
OAI-SearchBotOpenAI
Perplexity-UserPerplexity
PerplexityBotPerplexity

Sources

Source
https://support.apple.com/en-us/119829
https://developers.google.com/search/docs/crawling-indexing/google-common-crawlers