I've had some moderate success asking Claude to "translate" smallish pieces of code from, eg, C++ to Python. One simple C++ file parser it managed to translate basically 100% right on one try. I wouldn't particularly trust the output- well, not until I run it through tests- but for quick "could this possibly work, what does the performance look like, what might this code look like" exploratory stuff it's been very useful, especially for code that you are likely to throw away anyway.
One example that I am still using: I wanted to generate a random DICOM file with specific types of garbage in it to use as input for some unit tests, and Claude was able to generate some Python that grabs some random DICOM tags and shoves vaguely plausible garbage data into them, such that it is a valid but nonsensical DICOM dataset. This is not hard, but it's a lot faster to ask Claude to do it.
One example that I am still using: I wanted to generate a random DICOM file with specific types of garbage in it to use as input for some unit tests, and Claude was able to generate some Python that grabs some random DICOM tags and shoves vaguely plausible garbage data into them, such that it is a valid but nonsensical DICOM dataset. This is not hard, but it's a lot faster to ask Claude to do it.