Googlebot, GoogleOther, Google-InspectionTool…
Googlebot reads pages so they can turn up in Google Search. Google has other crawlers too, for Google Images, shopping, ads and product research. Whether pages may be used for Google's AI (Gemini) is controlled by a separate robots.txt name, Google-Extended; it is a rule, not a separate visitor.
Worth knowing: Googlebot nowadays reads the web as a smartphone. Since Google's switch to “mobile-first indexing”, the phone version of a page is the one that counts in its search results.