I generally use it for boilerplate tasks like “here’s some code, write unit tests” or “here’s a JSON object, write a model class and parser function”.
Claude is significantly faster, so even if it requires a couple more prompt iterations than GPT4, I still get the result I need earlier than with GPT4.
GPT4 also recently developed this annoying tendency to only give you one or two examples of what you asked for, then say “you can write the rest on your own based on this template”. I can’t overstate how annoying this was.