I was blown away when I paid to get an API key for it. The process is intricate and state of the art.

Probably the greatest achievement of modern society, a rebirth of the Library of Alexandria. Of course, only private for-business corporations are allowed to steal the world's knowledge, apparently, and only to be able to monetise it. There's something deeply wrong with our civilization that Anna's Archive is punished while companies like OpenAI, Google, Amazon, Anthropic, etc are just ... ignored when they do things like destructively digitise books or pirate things.