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Codex setup guide

Codex installation and setup guide

Check the system requirements and prepare for installation, then connect your account and models after installing the official release.

Prepare for installationRead the full guide

Choose your operating system

Installers have not been published yet. Check the system requirements first, then follow the instructions for your platform after release.

Windows

For Windows 10/11, 64-bit

Not yet published
Installation notes
Follow the installer instructions

macOS

Apple Silicon (M series), macOS 14 or later

Not yet published
Installation notes
Installs to Applications by default

Preparation and setup

Prepare first, then install, connect and start your first task.

  1. Check requirements and back up

    Check the requirements above and back up your existing configuration and important files. When the installer is released, verify its source, operating system and architecture.

  2. Install and connect

    Install the official release using the instructions for your operating system. Open the assistant, connect your account and configure your models.

  3. Start your first task

    Start with a simple task to check your connection and model, then choose Skills as needed.

Get started in four steps

Install the assistant, complete setup, choose a skill and give Codex your task.

  1. Download and install the assistant

    • Choose the installer for Windows or Apple Silicon Mac
    • Follow the installation instructions
    • Check that Codex opens after installation
    Ready whenAssistant installed

  2. Set up Codex

    • Connect your account in the assistant
    • Select a model for your task
    • Check the connection, then open Codex
    Ready whenCodex is ready for your task

  3. Choose a skill

    • Browse content, office and research skills
    • Send the installer and instructions to Codex
    • Follow the project guide to create your first result
    Ready whenStart a practical task

  4. Describe your first task

    • Describe the result you need
    • Add references, intended use and an output format
    • Review the result and tell Codex what to adjust
    Ready whenGet a result you can keep refining

Frequently asked questions

Can I download the installer now?

Client installers are not yet released. Review the pre-installation checklist or choose Skills first. Once an official installer is available, follow the guide for your system.

How do I install the official release?

Once you have the official Windows installer, follow its backup, installation, launch and connection steps. Check its system and architecture requirements first.

Once you have the official PKG, quit any running Assistant and follow the installation prompts. Then open Codex Assistant in Applications. Check the official installer’s system and architecture requirements first.

What if macOS shows a Privacy & Security prompt?
  1. Confirm that the installer came from this site and that you trust the source.
  2. After trying to open it, go to System Settings → Privacy & Security and find the blocked installer or app.
  3. Select Open Anyway and follow the prompts. The label may vary by macOS version.

If macOS says the file is damaged or will damage your computer, stop installing and contact support. On a managed computer, contact your administrator.

Read Apple's instructionsOpens in a new window