“Hey Google, did you upgrade your AI in my Android Auto?”

Google’s platform for casting audio and navigation apps from a smartphone to a car’s infotainment system beat Apple’s to market by a good while, but that headstart has not always kept Android Auto in the lead ahead of CarPlay. But an upgrade rolls out today—provided you already have Gemini on your phone, now it can interact with you while you drive.

What has sometimes felt like a hands-off approach by Google toward Android Auto didn’t reflect an indifference to making inroads into the automotive world. Apple might have its flashy CarPlay Ultra that lets Cupertino take over the look and feel of a car’s digital UI, but outside of an Aston Martin, where will any of us encounter that?

Meanwhile the confusingly similarly named Android Automotive OS—a version of Android developed to run with the kind of stability required in a vehicle as ...