--- title: Elixir v1.20.0-rc.5 released | daily.dev description: Elixir v1.20.0-rc.5 release candidate is out, requiring Erlang/OTP 27+ with compatibility up to OTP 29. Key enhancements include occurrence typing on case,... canonical: https://daily.dev/posts/elixir-v1-20-0-rc-5-released-qo5pu5618 twitter:card: summary_large_image twitter:site: @dailydotdev og:type: website og:site_name: daily.dev og:title: Elixir v1.20.0-rc.5 released | daily.dev og:description: Elixir v1.20.0-rc.5 release candidate is out, requiring Erlang/OTP 27+ with compatibility up to OTP 29. Key enhancements include occurrence typing on case,... og:url: https://daily.dev/posts/elixir-v1-20-0-rc-5-released-qo5pu5618 og:image: https://api.daily.dev/og/posts/qo5PU5618.png og:image:alt: Elixir v1.20.0-rc.5 released og:image:width: 1200 og:image:height: 630 og:locale: en --- > ## Documentation Index > Fetch the complete documentation index at: https://daily.dev/llms.txt > Use this file to discover all available pages before exploring further. # Elixir v1.20.0-rc.5 released **[Elixir Forum](https://daily.dev/sources/elixirforum)** · 2 min read · 0 upvotes · 0 comments ## Summary Elixir v1.20.0-rc.5 release candidate is out, requiring Erlang/OTP 27+ with compatibility up to OTP 29. Key enhancements include occurrence typing on case, cond, and with expressions, SWAR-optimized string operations, Float.round/2 performance improvements, Erlang record printing support in Inspect, and new Mix commands like `mix source` for locating module/function definitions. A notable breaking change disallows raw CR line endings in strings and comments for security reasons. Several bug fixes address compiler crashes, Logger configuration persistence, and Stream/String edge cases. ## Full article daily.dev links to this article rather than hosting it. Read it at the original source: ## Similar posts on daily.dev - [Elixir v1.20.0-rc.5 released](https://daily.dev/posts/elixir-v1-20-0-rc-5-released-qekovowmu) · Elixir Forum · 0 upvotes · 0 comments - [Elixir v1.20.0 released](https://daily.dev/posts/elixir-v1-20-0-released-7hyajmuxu) · Elixir Forum · 1 upvotes · 0 comments - [Elixir v1.19 released: enhanced type checking, broader type inference, and up to 4x faster compilation for large projects](https://daily.dev/posts/elixir-v1-19-released-enhanced-type-checking-broader-type-inference-and-up-to-4x-faster-compilati-rc2s8j4bd) · Elixir · 22 upvotes · 0 comments --- Tags: [#elixir](https://daily.dev/tags/elixir), [#erlang](https://daily.dev/tags/erlang) [View this post on daily.dev](https://daily.dev/posts/elixir-v1-20-0-rc-5-released-qo5pu5618) ```json {"@context":"https://schema.org","@graph":[{"@type":"Organization","@id":"https://daily.dev/#organization","name":"daily.dev","url":"https://daily.dev","logo":{"@type":"ImageObject","url":"https://daily.dev/apple-touch-icon.png","width":180,"height":180},"sameAs":["https://twitter.com/dailydotdev","https://github.com/dailydotdev","https://www.linkedin.com/company/daily-dev-ltd"]},{"@type":"WebSite","@id":"https://daily.dev/#website","url":"https://daily.dev","name":"daily.dev","publisher":{"@id":"https://daily.dev/#organization"},"potentialAction":{"@type":"SearchAction","target":{"@type":"EntryPoint","urlTemplate":"https://daily.dev/search?q={search_term_string}"},"query-input":"required name=search_term_string"}}]} {"@context":"https://schema.org","@type":"TechArticle","headline":"Elixir v1.20.0-rc.5 released","url":"https://daily.dev/posts/elixir-v1-20-0-rc-5-released-qo5pu5618","mainEntityOfPage":{"@type":"WebPage","@id":"https://daily.dev/posts/elixir-v1-20-0-rc-5-released-qo5pu5618"},"datePublished":"2026-07-09T07:04:39.255Z","dateModified":"2026-07-09T07:05:25.473Z","description":"Elixir v1.20.0-rc.5 release candidate is out, requiring Erlang/OTP 27+ with compatibility up to OTP 29. 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