Maybe you were thinking the autopilot accident rate being 5-10x _less_ than human drivers?
> In the 2nd quarter, we recorded one crash for every 4.41 million miles driven in which drivers were using Autopilot technology (Autosteer and active safety features). For drivers who were not using Autopilot technology (no Autosteer and active safety features), we recorded one crash for every 1.2 million miles driven. By comparison, NHTSA’s most recent data shows that in the United States there is an automobile crash every 484,000 miles.
Tesla publishes these safety reports; the accident rate has held fairly steady quarter over quarter: https://www.tesla.com/VehicleSafetyReport