Yes
With Opus 4.5 I got it done in a couple of weeks, mostly nights and weekends
enraged_camel on Hacker News
4-6 months easily
In the thread “The AI Vampire”, replying to this comment
Helped: Migrating large complex database and codebase with high accuracy.
… This is a project that would have taken me 4-6 months easily and the extreme tediousness of it would probably have burned me out. With Opus 4.5 I got it done in a couple of weeks, mostly nights and weekends. Over many phases and iterations, it caught, debugged and fixed its own bugs related to the migration and data validation logic that it wrote, all of which I reviewed carefully. …