This has been standard usage for nearly 70 years. I highly recommend reading the original proposal by McCarthy et al. from 1955: https://www-formal.stanford.edu/jmc/history/dartmouth/dartmouth.html

Arguing that AI is not AI is like arguing that irrational numbers are not “irrational” because they are not “deprived of reason”.

Edit: You might be thinking of “artificial general intelligence”, which is a theoretical sub-category of AI. Anyone claiming they have AGI or will have AGI within a decade should be treated with great skepticism.