OpenAI launches a Codex plugin that runs inside Anthropic's Claude Code

THE DECODER / 3/31/2026

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Key Points

  • OpenAI released a new Codex plugin that integrates its AI coding assistant directly into Anthropic’s Claude Code environment.
  • The plugin enables users to run Codex functionality from within Claude Code rather than switching between separate tools.
  • This cross-platform integration suggests expanding interoperability between major AI coding assistants and ecosystems.
  • The move may influence developer workflows by changing where and how AI-assisted coding is accessed during software development.

OpenAI released a plugin that embeds its AI coding assistant Codex directly into Anthropic's Claude Code.

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