Codex from 0 to 10M Users: Building ChatGPT Work — Akshay Nathan, OpenAI
Codex and ChatGPT Work hit 10M users in two weeks as knowledge workers outpace developers 3x.
“There are roughly 100x more people who use code than who can write code.”— Greg Brockman
OpenAI's ChatGPT Work launched July 9th and combined with Codex reached 10M users in under two weeks, with MAU up 10x since January 2026. Knowledge workers now represent 20% of Codex's user base and are growing 3x faster than developers, signaling coding agents 'breaking containment' into general knowledge work. A Greg Brockman-led reorg consolidating product and ChatGPT under Codex leadership formalized the pivot from developer tool to universal knowledge work agent platform.