On March 30, 2026, OpenAI released the codex-plugin-cc plugin on GitHub, allowing developers to directly invoke OpenAI's Codex model within Anthropic's Claude Code. Through three core commands—/codex:review, /codex:adversarial-review, and /codex:rescue—the plugin enables code review, adversarial review, and task handoff functionalities, enhancing code quality and development efficiency. It also supports background task management, result retrieval, and cancellation operations, while introducing a review gate mechanism for automated reviews. This cross-brand collaboration breaks down ecosystem barriers, enabling developers to leverage the technical strengths of both companies within a single environment, marking the evolution of AI programming tools toward multi-model collaboration.