ToolsFebruary 17, 2026via Pragmatic Engineer
How Codex is built
Why it matters
Understanding how leading AI coding agents are architected gives technical leaders insights into building internal AI development tools and evaluating vendor capabilities.
Key signals
- Exclusive deepdive into OpenAI's Codex team methodology
- Internal engineering usage patterns revealed
- Future software engineering implications outlined
The hook
NOBODY TALKING: Everyone debates which AI coding tool wins. Nobody is talking about how OpenAI actually builds Codex.
A deepdive into how OpenAI's Codex team builds its coding agent, how engineers use it, and what it could mean for the future of software engineering. Exclusive