Elixir v1.20 Adds Set-Theoretic Gradual Types with Compiler Inference
June 5, 2026
Elixir v1.20 ships a gradual, set-theoretic type system with automated inference, a specialized dynamic() type, and compiler-level detection of potential runtime failures via type narrowing in guards and pattern clauses. No annotations are required for inference to activate.
HOW THIS AFFECTS YOU
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builderIf you run Elixir in production, the new type inference catches runtime failure paths at compile time without requiring manual type annotations.