OpenAI announced Thursday it has agreed to acquire Astral, the company behind widely used open source Python development tools including uv, Ruff, and ty. The deal will integrate Astral’s technology into OpenAI’s Codex team to accelerate AI-driven software development.
Astral’s tools are foundational in modern Python workflows. uv is a fast, Rust-based package manager with over 126 million monthly downloads. Ruff, a linter and code formatter, sees 179 million monthly downloads. Ty, a type-checker in beta, is downloaded 19 million times per month.
Charlie Marsh, who founded Astral three years ago, said OpenAI will continue supporting all open source projects. The company confirmed it will maintain public development and community collaboration.
This acquisition follows OpenAI’s purchase of Promptfoo earlier this month and underscores its push to dominate the AI coding assistant market, competing directly with Anthropic’s Claude Code. Anthropic previously acquired Bun, a JavaScript runtime, to strengthen its platform.