Could aliens use AI too?

Yes — they could, and if an alien civilization were advanced enough, it would be plausible for them to use AI extensively.

In fact, some scientists and futurists have suggested that any long-lived technological civilization might eventually rely on machine intelligence for problem-solving, exploration, or even as a post-biological form of civilization. AI or robotic probes could also be especially useful for interstellar travel because machines can tolerate long journeys better than biology.

That said, this is still speculation. We have no confirmed evidence of extraterrestrial life, and no evidence about whether any alien civilization exists or what kind of intelligence it might use.

So the safest answer is: yes, aliens could use AI, and advanced aliens might be very likely to do so — but we don’t know for sure.