ChatGPT Codex

ChatGPT Codex

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Cloud-based AI coding assistant that works per-repository in sandboxed environments to write code, fix bugs, run tests, apply diffs, and propose or automate pull requests.

Desktop App for Mac, Windows (PC)

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ChatGPT Codex is an AI-powered coding assistant designed to enhance software development workflows through advanced code understanding, generation, and editing capabilities. It supports complex programming tasks such as building projects from scratch, debugging, large-scale refactoring, and automated code review with high precision.

The app features a specialized model optimized for interactive development and long, independent execution of engineering tasks. It can read and interpret entire code repositories, plan multi-step edits, apply precise diffs, and run tests or commands within the dev environment, helping maintain coherent state through extensive debugging and iterative fix cycles. Codex prioritizes minimal, safe code changes while reliably processing logs, compiler output, and error messages to inform subsequent actions.

Integration options include use within popular IDEs like Visual Studio Code, JetBrains, and Xcode, as well as command line interfaces and GitHub Actions, enabling automation of pull requests, file refactoring, and test writing directly from your workflow. Multiple approval modes allow users to control Codex's autonomy, ranging from consultative chat interactions to full access for executing commands and edits autonomously in a controlled environment.

Supporting structured outputs, function calling, and multimodal inputs (such as images or screenshots for UI development), ChatGPT Codex adapts its reasoning effort to task complexity, balancing fast responses for simple requests with sustained focus on large or multi-hour projects. This balance helps developers maintain engineering stability, reduce accidental overwrites, and perform thorough code reviews by reasoning over dependencies and validating behavior against tests.

By combining powerful autonomous coding capabilities with flexible integration and security features, ChatGPT Codex serves as a versatile tool for developers seeking to streamline coding, testing, and review processes within their existing development ecosystems.

This description was generated by AI (artificial intelligence). AI can make mistakes. Check important info.


Codex: a cloud-based software engineering agent that can work on many tasks in parallel. Codex can perform tasks for you such as writing features, answering questions about your codebase, fixing bugs, and proposing pull requests for review; each task runs in its own cloud sandbox environment, preloaded with your repository.

Website: chatgpt.com

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