
Ruby 4.0 Is Here. Why Is AI Still Writing Ruby 3.0?
June 17, 2026
Artificial intelligence has become an indispensable tool for Ruby developers.
We ask AI assistants to write methods, refactor services, generate RSpec tests, explain stack traces, and even architect new features. For many developers, AI is no longer an experiment—it’s part of the daily workflow.
That’s exactly why we should expect more from it.
If I’m writing a Ruby 4.0 application, I don’t want my AI assistant producing Ruby that looks like it came from 2021.

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