Codex¶
Codex is like Claude Code but its from OpenAI.
- OpenAI Developers - Codex Developers Hub
- How OpenAI Uses Codex - PDF guide on OpenAI's internal usage
- Builders Community - Codex Builders Community
- Codex Cookbook
- Getting Started with Codex - Youtube video
- Introducing GPT-5.3-Codex - The most advanced agentic coding model for professional software engineering and defensive cybersecurity
- Leveraging Codex in an agent-first world - Humans steer. Agents execute.
- Tips for long-running agents that do real work - Shell + Skills + Compaction