[klyrs]

> In a way, doesn't it already "talk to itself" when generating sentences, e.g., its output token gets added to the input tokens successively?

If this is the basis of a mirror test, most AI recognition attempts have pretty high failure rates, so I'd say they currently fail. But if we presented a similar test to a human, "did you write this?" it seems to fall short of a mirror test because it can be falsified by an otherwise unintelligent algorithm which remembers its previous output.