Codex App

Install

Install the Codex App for macOS or Windows.

Usage with Ollama

<Note>Codex works best with a larger context window. It is recommended to use a context window of at least 64k tokens.</Note>

Quick setup

ollama launch codex-app

To choose a model:

ollama launch codex-app --model gpt-oss:120b

To configure without launching:

ollama launch codex-app --config

To restore your usual Codex profile:

ollama launch codex-app --restore

Backups

Before overwriting Codex App config files, Ollama Launch saves backups under ~/.ollama/backup/codex-app/. On Windows, ~ resolves to your user profile directory.