Yes
for production Haskell Opus 4.5+ is really good
solomonb on Hacker News
In the thread “A case for Go as the best language for AI agents”, replying to this comment
Helped: Using Opus 4.5+ for production Haskell code.
Got in the way: Other models were not effective for the user.
I've been using LLMs (Opus) heavily for writing Haskell, both at work and on personal projects and its shockingly effective. I wouldn't use it for the galaxy brain libraries or explorations I like to do for my blog but for production Haskell Opus 4.5+ is really good. No other models have been effective for me.