Does Gemini CLI fall short? Here’s how Codex compares

The article provides a detailed comparison between two AI-powered command-line interfaces (CLIs), Google’s Gemini CLI and OpenAI’s Codex CLI, both designed to integrate AI capabilities directly into the terminal for developers. It explores their installation processes, capabilities, and performance through hands-on testing across real-world developer tasks such as explaining codebases, creating projects from scratch, and building from screenshots. Codex CLI, developed by OpenAI, is noted for its structured summaries, flexibility in integrating with multiple language model providers, and the ability to run models locally, making it suitable for developers familiar with Linux environments. In contrast, Google’s Gemini CLI is praised for its broader insights into project structures and a smoother iterative process for bug fixing, requiring less initial setup and running natively on Windows. Ultimately, the choice between Codex and Gemini depends on whether a developer values flexibility and provider options or a more guided, interactive experience with minimal setup.