codex
Everything on Ground Truth tagged “codex” — 3 items.
The Codex desktop app ships a full copy of LibreOffice News
Simon Willison found on September 1, 2026 that OpenAI's Codex desktop app caches 1.7 GB of bundled runtimes -- a complete Python installation, a complete Node.js installation, and native binaries for git, Poppler and the entire LibreOffice office suite -- which the agent's skills then invoke to handle documents.
OpenAI Codex Only Lets You Fill 272K of a 400K Window, On Purpose News
OpenAI's Codex coding agent exposes a 272,000-token input budget inside a 400,000-token model window, reserving the rest for output, and users frustrated by early auto-compaction have mistaken the reserve for a downgrade.
GPT-5.5 Codex Keeps Cutting Its Own Reasoning Off at Exactly 516 Tokens News
A GitHub analysis of 390,195 coding-session responses found GPT-5.5 disproportionately cuts off its own reasoning at exactly 516 tokens, a pattern likely caused by a batching bug rather than an intentional change.