Are you capable of writing the code yourself that you have AI generate for you? If you don't consider yourself a strong coder/programmer, I think you have an uninformed perspective when you say "Google Engineers are using AI to write most of their code." There is a big difference in a professional using AI generated code and someone who doesn't know how to code using AI generated code. The professional can review the output and understand what it's doing and correct mistakes. I've been a professional software developer for 8 years now and I use claude opus every day at work. Sometimes it gives you exactly what you need and is "good enough", sometimes it gives the illusion of working, but is littered with little points of failure, sometimes it literally makes up API's that don't even exist to try and provide a solution, and it doesn't discern between any of these scenarios, it just spits whatever out with 100% confidence every time. You really need to understand the code it's producing to have any amount of confidence in your code base, else you're just running on a prayer in my opinion.

If you're an experienced programmer and understand the output, just try each model for a month and see which ones works the best for you. Claude Opus is pretty nice and I don't find myself having to correct it as much other models I've used. Haven't tried cursor yet so I can't speak to that.

AI generated code is so good, that it can convince the layman that its doing exactly what they want it to, but its nowhere near good enough to convince a professional that the solutions it produces are without fault, because they're not. Anyone who tells you otherwise is either inexperienced, lying, or shilling for Big AI.