OpenAI acquires Astral to expand its Codex AI coding platform

OpenAI has announced it will acquire Astral, the team responsible for a trio of open source Python tools that have quietly become essential to how modern developers work. The deal folds Astral's engineering talent and its tooling ecosystem into Codex, OpenAI's platform for AI-assisted software development.

The tools Astral has built are not flashy, but they are everywhere. uv streamlines how developers manage dependencies and environments, Ruff handles linting and formatting at speeds that were previously hard to come by, and ty keeps type safety in check across large codebases. Millions of Python developers reach for these tools daily, often without thinking twice about it — which is exactly the kind of quiet ubiquity that makes them valuable. OpenAI has committed to keeping them open source after the deal closes.

The timing reflects real momentum behind Codex. OpenAI reports that the platform has grown 3x in users and 5x in overall usage since the start of 2026, with more than 2 million developers now using it every week. The company is pushing Codex in a direction that goes well past autocomplete — toward an AI collaborator that can help plan a project, navigate a codebase, run tools, and catch problems before they compound. Astral's tooling slots directly into that picture. "By bringing their expertise and ecosystem to OpenAI, we're accelerating our vision for Codex as the agent most capable of working across the entire software developer lifecycle," said Thibault Sottiaux, Codex Lead at OpenAI.

For working developers, the practical takeaway is reassuring in the short term: the tools they rely on are not going anywhere, and will continue to be maintained. What changes over time is likely to be additive — tighter connections between Astral's utilities and Codex that let AI systems operate more fluidly inside real Python workflows. 

The acquisition is pending regulatory clearance and standard closing conditions. For now, Astral and OpenAI remain independent.

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