From routine pull requests to your hardest problems, Codex reliably completes tasks end to end, like building features, complex refactors, migrations, and more, powered by OpenAI’s frontier coding …

Codex is an AI coding agent that helps you build and ship faster.

Codex CLI is a coding agent from OpenAI that runs locally on your computer. If you want Codex in your code editor (VS Code, Cursor, Windsurf), install in your IDE.

The official Codex desktop app from OpenAI is your command center for agentic software development.

Codex is an AI coding agent developed by OpenAI for software engineering tasks such as writing code and fixing bugs, released in April 2025 as Codex CLI. [1] Codex is available through ChatGPT's web …

Mar 24, 2026 · A plain-English beginner’s guide to Codex: what it is, how it works across app, CLI, IDE, and cloud workflows, and how to start using it effectively.

Mar 5, 2026 · We selected the name “Codex” as Leonardo da Vinci was the embodiment of the Renaissance ideal. His “Codex”, or notebooks, are a testament to his interest in a multitude of …

Read, modify, and run code on your machine with the power of AI.

Oct 27, 2025 · Codex is essentially an AI programming assistant from OpenAI, optimized based on the GPT-5 model. The 2025 version of Codex has evolved from a simple code completion tool into a truly...

Apr 24, 2026 · Codex is an AI-powered coding agent developed by OpenAI that helps developers write, understand, and improve code. It can handle tasks like generating features, fixing bugs, and …