Everybody produces bugs, but Claude is good a producing code that looks like it solves the problem but doesn't. Developers worth working with, grow out of this in a new project. Claude doesn't.
An example I have of this is when I asked Claude to copy a some functionality from a front-end application to a back-end application. It got all of the function signatures right but then hallucinated the contents of the functions. Part of this functionality included a look up map for some values. The new version had entirely hallucinated keys and values, but the values sounded correct if you didn't compare with the original. A human would have literally copied the original lookup map.