Both stocks have delivered good returns recently. But only one looks like a good bet going into 2026.Over the past six months, Tesla (TSLA +1.76%) and Alphabet (GOOGL +1.10%) have both delivered eye-catching gains as investors seemingly crowd into anything tied to AI (artificial intelligence). Tesla shares are up more than 45% in that span, while Alphabet has climbed nearly 70% and is closing in on a $4 trillion market capitalization.The stories behind those moves look very different. Tesla is still primari ...