I’m still seeing a decent number of people on Twitter complain occasionally that they’ve tried AI-driven coding workflows and the output is crap and they can move faster by themselves. There’s less of these people in the world of Opus 4.5 and Gemini 3 now, but they’re still there. Every time I see this I want to know what they’re working on and what languages and libraries they’re using. Turns out that models kind of universally suck at Python and Javascript. The top performing languages (independent of model) are C#, Racket, Kotlin, and standing at #1 is Elixir.