Nvidia has been a bellwether in the artificial intelligence (AI) space thanks to its graphics processing units (GPUs) that have played a crucial role in the training and deployment of AI models. But the stock has fallen out of favor of late as investors are worried about its slowing growth.

These three small-cap AI stocks have a shot at generating millionaire-making gains over the next decade: SoundHound AI (NASDAQ: SOUN), Serve Robotics (NASDAQ: SERV), and Evolv Technologies (NASDAQ: EVLV). Image source: Getty Images.

There's no question that artificial intelligence (AI) stocks have led the charge in the current bull market, but in recent months, that leadership seems to be fading. Some investo