Codex Advanced User Guide: Making AI Your Programming Partner

OpenAI's Codex is a cloud-based programming intelligence for software engineers that improves development efficiency. available May 2025 for Pro, Enterprise, and Team users only, with GitHub affiliation and MFA certification. codex offers both Ask and Code modes, and supports parallel processing and PR creation for tasks. Codex provides both Ask and Code modes, supporting parallel processing of tasks and PR creation. It can significantly improve work efficiency in code review, bug fixing, automated testing and other scenarios through reasonable prompt design and project configuration optimization.