OpenAI Ships a Codex Plugin for Claude Code, Putting Its Agent Inside a Rival's Tool
OpenAI open-sourced a plugin that puts Codex directly inside Anthropic's Claude Code, adding three commands for code reviews and task delegation without switching terminals. The release lands as Claude Code holds a commanding lead with a $2.5 billion run rate while Codex has tripled to 1.6 million weekly users. Cross-compatible architectures mean every /codex:review burns OpenAI API tokens. What signal does building into your rival's tool actually send?
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