# Head of Codex: “90% of people at OpenAI use Codex. Not 90% of engineers - 90%...
Canonical: https://social-archive.org/yena/kSy7qYmTPI
Original URL: https://x.com/0xMovez/status/2071950234725290053
Author: Movez
Platform: x
## Content
Head of Codex: “90% of people at OpenAI use Codex. Not 90% of engineers - 90% of the entire company. We build an agent → create a loop for it → that agentic loop does 40% of the coding at Codex.” in a 1-hour podcast, the Head of Codex revealed the entire workflow of every OpenAI engineer. Codex + loops + harness + LLM ops - the secret stack. Watch this podcast today, then read the full guide on loop engineering below.