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[ARTICLE · art-118113] src=simonwillison.net ↗ pub= topic=generative-ai verified=true sentiment=· neutral

Codex bundles LibreOffice

OpenAI's Codex desktop app, now rebranded as ChatGPT, bundles a 1.7GB runtime that includes full Python and Node.js installations, native binaries for Poppler, git, and the LibreOffice open source office suite, according to a blog post by Simon Willison. The runtime, located in the `codex-primary-runtime` folder, includes skills that enable Codex to use these tools for document processing.

read1 min views6 publishedSep 1, 2026

I was poking around in my ~/.cache/

folder using OmniDiskSweeper when I spotted something interesting. The OpenAI Codex desktop app (since rebranded to just ChatGPT) has 1.7GB of stuff in there in a folder called codex-primary-runtime

, including a full Python installation, a full Node.js installation, and native binaries for Poppler, git, and the LibreOffice open source office suite (which forked from OpenOffice.org in 2010):

The ~/.cache/codex-runtimes/codex-primary-runtime/plugins/openai-primary-runtime/plugins/documents

folder includes skills which tell Codex how to find and use those binaries.

Tags: codex, generative-ai, openai, ai, llms, openoffice, open-source

source & further reading
simonwillison.net — original article Introducing Hy4 Preview Quoting Paul Dix llm-anthropic 0.27
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