OpenAI Codex IDE Extension: Setup & Usage Guide for VS Code, Cursor, and JetBrains IDEs
Discover how to install, configure, and maximize OpenAI's Codex IDE extension across popular coding environments like VS Code, Cursor, and JetBrains...
OpenAI’s Codex is an AI-powered programming assistant designed to streamline coding workflows by reading, editing, and executing code. It helps developers build projects faster, resolve bugs, and understand unfamiliar code snippets—all with the support of advanced AI models. To bring this functionality directly into your favorite integrated development environments (IDEs), OpenAI offers the Codex IDE extension, compatible with VS Code, its forks like Cursor and Windsurf, and JetBrains IDEs.
Installing the Codex extension is straightforward: you can download it from the Visual Studio Code Marketplace or grab dedicated versions for Cursor and Windsurf from their respective download pages. Once installed, the extension typically appears in the IDE’s sidebar, though setup steps vary slightly across platforms.
For VS Code users, Codex defaults to the right sidebar. If it doesn’t show up immediately, a quick restart of the editor should resolve this. You can also customize its position by dragging the Codex icon to the left sidebar if that’s more convenient.
Cursor users may face a minor hurdle: the IDE’s default horizontal activity bar can hide Codex. To fix this, temporarily change the activity bar direction to vertical via workspace settings (search for “activity bar” and adjust the direction), restart the editor, then drag the Codex icon to the right sidebar (e.g., next to the Cursor chat tab). After moving Codex, you can reset the activity bar back to horizontal to maintain Cursor’s default layout.
JetBrains IDE users (including Rider, IntelliJ, PyCharm, and WebStorm) can integrate Codex by installing the JetBrains IDE integration plugin. This plugin supports login via ChatGPT account, API key, or JetBrains AI subscription, making it easy to access Codex’s features within these environments.
Logging into the extension is simple: after installation, you’ll be prompted to sign in using your ChatGPT account (note that Codex is included in ChatGPT Plus, Pro, Business, Edu, and Enterprise plans) or an API key. For more details on usage limits and pricing, refer to OpenAI’s pricing page.
The Codex extension updates automatically, but you can manually check for updates via your IDE’s extension manager. Additionally, you can bind useful Codex commands (like toggling the chat interface or adding code to context) to custom keyboard shortcuts—access these options via the Codex chat’s settings icon or your IDE’s keyboard shortcut menu. New users should also check out OpenAI’s best practices guide to get the most out of Codex.
Sources