OpenAI revives the Codex name as an open-source CLI agent | CodexMaster

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April 16, 2025milestonechronicleThe Agent EraOpenAI Codex

OpenAI revives the Codex name as an open-source CLI agent

Codex CLI ships on GitHub alongside o3 and o4-mini — a terminal agent that edits files and runs commands locally. Two months after Claude Code's preview, the terminal-agent format has both frontier labs' names on it.

Sources

techcrunch.com
github.com

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