This report offers a detailed analysis of OpenAI Codex CLI and compares it with other AI coding agents, such as Cody, GitHub Copilot, Windsurf, and Tae. It starts by examining the evolution of AI coding tools and their applications in software development as of 2023. The OpenAI Codex CLI is highlighted for its capabilities in generating executable code and integrating with development environments, making it a valuable asset for developers. Each tool analyzed possesses unique strengths: Cody focuses on code quality, GitHub Copilot provides seamless integration with IDEs, Windsurf addresses front-end development needs, and Tae is tailored for mobile application development. The comparison section elucidates the key differentiators between these tools, particularly in their user interfaces and technologies employed. Concluding recommendations advise potential users on selecting the most suitable AI coding agent depending on their project requirements and programming environments. This report emphasizes the ongoing impact of AI coding agents on the software development landscape.