I’ve reimplemented some python science code into rust using LLMs and it absolutely works well if you setup the criteria for done. In my case it was GIS-ish code so a key requirement was identical in/out pairs at 10k points across CONUS. It worked, and when it didn’t it showed up bugs that the agent would go and research, read up on other implementations, then try again.
Net result faster (10-70x) and massively lower memory footprint. Now we’ve got a service that can do something essentially instantly that most people wouldn’t have even bothered to try before.