Tools & HarnessesOpenAI
Codex
OpenAI's coding agent, available as a terminal CLI and inside ChatGPT.
TRIALOn the radar since 12 Oct 2026Draft
Why Trial
Codex reads the same instructions and skills as Claude Code. I run it as a second agent next to Claude.
Movement
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Sources
- OpenAI publishes Codex as a lightweight coding agent that runs in the terminal. checked 12 Oct 2026
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