I have tried GPT3.5 and GPT4 for this type of task - the "near perfect results" is really problematic because you need to verify that it's likely correct, notify you if there's issues, and even then you aren't 100% sure that it selected the correct first/last name.

This is compared to a standard html form. Which is.... very reliable and (for us) automatically has error handling built in, including alerts to us if there's a 504.