The markets are experiencing an artificial intelligence (AI) gold rush. There are at least 50 AI companies being incubated at Y Combinator. And new AI startups keep cropping up with bigger and bigger valuations. AI company Cohere is reportedly looking to raise money at a $6 billion-plus valuation. Stability AI is reportedly seeking a $4 billion valuation. Mobius AI — founded by four AI researchers from Google — reached a roughly $100 million valuation just one…