The April scoreboard for dedicated artificial intelligence (AI) stocks just landed, and the result is not what most retail investors would guess. SoundHound AI (NASDAQ:SOUN) led the pack with a 16% April gain, while Palantir Technologies (NASDAQ:PLTR) was actually down 5% for the month. C3.ai (NYSE:AI) landed in the middle, rising 5% in April from ... SoundHound, Palantir, or C3.ai: Which AI Stock Won April? The Answer Will Surprise You