I had heavy problems to solve. Claude Opus could solve some. I could solve them too, but with claude it's faster. One recent problem would take around two days if I would do it, but claude did it in half an hour.
I'm not advertising claude, if it gives bullshit response I turn it off instantly. Like with every tool, you need to learn to use it.
Another example: In the app I work on, there's a huge list of city integration files. I had a loose set of specifications for a new city, and with claude I could roll out a new prototype in no time. It saved me about a month of work.
It's expensive and energy hungry for sure.