Not a major productivity boost, but they do help sometimes. Not living up to the hype, though.

It helps a lot for boilerplate code

They both assist in sort of the way autocomplete does just a much smarter suggestion than a list of methods or whatever. The real 🔥 right now is Claude as a code generator. It's just so much better at modern coding tasks than OpenAI's models have been so far - so we're starting to glimpse what coding will be in a year or two.