OpenAI Codex desktop app now includes bundled LibreOffice binaries

The OpenAI Codex desktop application, now referred to as ChatGPT, includes a bundled runtime that contains LibreOffice binaries. This runtime resides in the user’s cache under ~/.cache/codex-runtimes/codex-primary-runtime. Alongside LibreOffice, the runtime ships with a full Python installation and a full Node.js installation. Native binaries for Poppler and git are also part of the package.

Because of these inclusions, the Codex cache grows to roughly 1.7GB. Engineers who rely on the Codex desktop app must account for this additional storage when planning disk usage or cleanup routines. The bundled tools eliminate the need to install LibreOffice separately for document-processing tasks. However, the larger footprint may affect performance on systems with limited storage capacity.

If the cache directory is removed or becomes inaccessible, Codex will lose access to the bundled LibreOffice and its associated skills. In such cases, the application would fall back to external installations or fail to process documents. The bundled setup therefore works only as long as the cache remains intact and readable.

The observation comes from a single blog post by Simon Willison, with no other feeds reporting the same detail. Without corroboration, engineers should treat the bundling as a noted possibility rather than a confirmed universal change. Independent verification of the cache contents is recommended before assuming the behavior across all installations.