Token
The small chunks of text (roughly three-quarters of a word in English) that models read and write. Usage, limits, and pricing are all counted in tokens.
“That PDF was 90,000 tokens, which is why the reply took a while.”
See also
One of the Essentials
Token is one of 20 Essential terms: the words you need to follow a news story or a work meeting about AI. It entered common use around 2023.