now ask it to use that pure implementation in a real world codebase that does something
or ask it to implement the sane thing in rust
the errors will abound
Discussion
also you only know it's perfect because you understand the stuff and you read the code
otherwise it could have been anything and we wouldn't know
I'm sure. It kinda depends though, I've seen good stuff and bad stuff (including in Rust, including cryptography). This case did have the advantage of being a pure implementation and not "new reasoning" task, though a hard one. I've seen more good than bad results. Also, this is the latest gen. I don't know if gpt5 is particularly good compared with others.
It's not reliable generally but if you know what you're doing it's super effective.
maybe implementing these pure algorithms from a descriptive source is the best thing they can do
which is similar to porting code from one language to another, the other best thing they can do