Compare GitHub Copilot vs. Codex CLI in 2025

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Description

Introducing your AI coding companion: GitHub Copilot, which provides whole line or entire function suggestions directly within your coding environment. Drawing from billions of lines of publicly available code, GitHub Copilot ensures that essential knowledge is always at your disposal, allowing you to save valuable time and maintain your concentration. Currently accessible as an extension for Visual Studio Code, it operates seamlessly both on your local machine and in the cloud via GitHub Codespaces. Its responsiveness allows you to receive suggestions in real-time as you type. Supporting a wide array of frameworks and programming languages, the technical preview excels particularly in Python, JavaScript, TypeScript, Ruby, and Go, while also having the capability to assist with numerous other languages. With GitHub Copilot, you maintain complete control over the coding process, as you can sift through various suggestions, decide which ones to implement or dismiss, and make manual adjustments to the proposed code. Additionally, GitHub Copilot fine-tunes its recommendations based on your coding style, ensuring a more personalized programming experience. This innovative tool truly empowers developers by enhancing productivity and creativity in their coding endeavors.

Description

OpenAI Codex CLI brings AI-driven automation directly to your terminal, providing a seamless experience for reading, editing, and executing code. With its zero-setup installation and multimodal input support, Codex can generate code based on simple text prompts, screenshots, or diagrams. Its approval workflow, with three distinct modes (Suggest, Auto Edit, Full Auto), allows users to control the AI’s interactions with their code. Whether reviewing code, refactoring, or prototyping, Codex enhances productivity, enabling developers to automate repetitive tasks, improve code quality, and accelerate the development cycle.