Can AI read wikipedia.org?

Solid. AI search crawlers can reach you and your homepage is readable.

AI search crawlers can reach it
OAI-SearchBot and PerplexityBot are allowed.
Homepage is readable by crawlers
The page ships real text in its HTML, so an AI crawler can read it.
Has an llms.txt
No /llms.txt. It is an emerging, optional convention, not required to be cited today. You can generate one at https://ai-visibility.lastminutedealshq.com/llms-txt

Check your own site or see the crawler census.