Good use case for Elixir. Apparently it performs best across all programming languages with LLM completions and its concurrency model is ideal too.
Claude 4.6 has been excellent with Go, and truly incompetent with Elixir, to the point where I would have serious concerns about choosing Elixir for a new project.
Before we continue, the following opinion comes with several important caveats:
1. It only applies to paid professional work. If it's a hobby project, choose whatever makes you happy.
2. It ignores the strengths and weaknesses of different languages. These may outweigh any LLM-related concerns.
3. This is my opinion today. I _think_ it will survive longer than the next LLM cycle, but who knows these days.
4. May contain nuts.
Okay, that's the ass-covering dispensed with, on to the opinion:
If the choice is between a language which is "LLM friendly" (for want of a better phrase) and one which is not, it is irresponsible to choose the latter.
Opus and Sonnett practically writes the same idiomatic elixir (phoenix, mind you) code that I would have written myself, with few edits.
It's scary good.