A recent study by Tencent showed that Elixir had the highest completion rate across models when compared among 20 different programming languages. In this article, we explore the reasons why that may be the case and how that extrapolates to coding agents.

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A Tencent study found Elixir achieved the highest LLM completion rate (97.5%) among 20 programming languages. The language's immutability enables clear local reasoning without side effects, explicit documentation with testable examples creates high-quality training data, and decade-long stability means no conflicting information across versions. Beyond single-pass generation, Elixir's fast parallel compilation, detailed warnings, low operational complexity (no need for Redis/RabbitMQ/Lambda), and runtime introspection make it well-suited for iterative coding agent workflows.

Why Elixir is the best language for AI

Language and ecosystem: what makes Elixir easy to get right

Tooling: why Elixir is easy to iterate on