That's because the Claude web UI doesn't yet have the equivalent of the ChatGPT Code Interpreter tool (though they say they're working on it). That's not about the quality of the Claude 3 Opus model, which is the model which people think compares to or beats GPT-4. It's about the tooling that has been built for ChatGPT.
Code interpreter is pretty neat, because you can tell ChatGPT to write some code and to make sure the code works, and then it'll write you some bad code, realize it's bad, and then iterate on it until it gets to a place that it's happy with. (Maybe I should say passes its test rather than anthropomorphize ChatGPT as being "happy".)
