Use OmniDino to power Codex from your terminal.
Install OpenAI’s official open-source Codex CLI, call available Codex models through the OmniDino Responses endpoint, and handle code understanding, editing, refactoring, testing, and automation in real projects.
What is Codex CLI?
It is not an ordinary chat window. Codex CLI is a coding agent that can read projects, call tools, and assist with engineering tasks directly from the terminal.
Start inside the project directory so the context stays with the code.
Codex CLI understands files relative to the current working directory, proposes changes, runs permitted commands, and displays the results. Before using it in earnest, confirm that the repository, permissions, model, and OmniDino API are configured correctly.
codex to keep working with the agent in an ongoing terminal conversation.codex exec for one-off automated tasks, scripts, and CI workflows.codex resume to continue an existing thread without repeating the project background.Every installation tool comes from GitHub.
OpenAI Codex
OpenAI’s official open-source Codex CLI project, with installation scripts, npm, Homebrew, and GitHub Releases.
CC Switch
A cross-platform, open-source configuration manager for Codex providers, Base URLs, models, and protocol settings.
Git
When Codex works in a real repository, Git provides version control, diff review, and change recovery.
Node.js
Node.js and npm are required only when installing Codex through npm. The official installer and binary methods may not require them.
openai/codex installation methods or GitHub Releases.
Choose the installation method for your operating system.
Windows PowerShell
Use OpenAI’s official installer. Reopen PowerShell after installation.
codex --version to verify the installation.powershell -ExecutionPolicy ByPass -c "irm https://chatgpt.com/codex/install.ps1 | iex"
codex --versionmacOS / Linux
Run OpenAI’s official shell installer, then check the installed version.
curl -fsSL https://chatgpt.com/codex/install.sh | sh
codex --versionGlobal npm Installation
Users who already have Node.js and npm can install the official npm package.
npm install -g @openai/codex
codex --versionHomebrew
macOS users can install Codex with Homebrew Cask.
--cask.brew install --cask codex
codex --versionGitHub Release
Manually select the official binary that matches your operating system and CPU architecture.
openai/codex.macOS arm64:
codex-aarch64-apple-darwin.tar.gz
macOS x86_64:
codex-x86_64-apple-darwin.tar.gz
Linux x86_64:
codex-x86_64-unknown-linux-musl.tar.gz
Linux arm64:
codex-aarch64-unknown-linux-musl.tar.gzConfigure the Base URL, model, and Responses protocol.
CC Switch is recommended. For manual configuration, add the provider to the user-level ~/.codex/config.toml.
OmniDino Parameters
Copy the exact model name from the OmniDino model catalog. Do not guess it.
model_provider = "omnidino"
model = "ENTER_THE_ACTUAL_CODEX_MODEL_NAME"
model_reasoning_effort = "high"
disable_response_storage = true
[model_providers.omnidino]
name = "OmniDino"
base_url = "https://api.omnidino.com/v1"
env_key = "OMNIDINO_API_KEY"
wire_api = "responses"export OMNIDINO_API_KEY="PASTE_YOUR_OMNIDINO_API_KEY"
codexFrom interactive sessions to automated tasks.
| Command | Purpose | Recommendation |
|---|---|---|
codex | Start an interactive Codex CLI session. | Enter the correct project directory first. |
codex --version | Show the installed version. | Record the version before troubleshooting. |
codex --help | Display commands and options supported by the installed version. | Trust the output from your local installation. |
codex exec "TASK" | Run a one-off non-interactive task. | Useful for scripts, automation, and CI. |
codex resume | Select and resume an existing session. | Resume it from the correct project directory. |
codex resume <session-id> | Resume a specific session. | Useful for precise continuation or handoff between tools. |
codex app | Launch the Codex desktop experience when supported by the installed version. | Continue using the CLI if unavailable. |
Choose a model for the task, not just by its name.
Codex-Specialized Models
Best for complete engineering tasks, tool calls, multi-file changes, and long coding sessions.
Advanced Reasoning Models
Best for architecture analysis, complex debugging, migration plans, and technical decisions.
Cost-Efficient Models
Best for code explanation, summaries, simple edits, and batch tasks.
Long-Context Models
Best for large repositories, documentation-heavy projects, and cross-module analysis.
Multimodal Models
Best for workflows that combine screenshots, designs, logs, and code.
Self-Hosted Models
Best for cost-sensitive batch processing and controlled infrastructure.
From installation to your first real task.
Install Git and Codex
Use the official GitHub projects and installation methods, then verify the installed versions.
Create a Dedicated API Key
Create a Codex-specific Key in the OmniDino console and set a sensible spending limit.
Configure the OmniDino Provider
Use CC Switch or user-level config.toml to set the Base URL, Responses protocol, and model.
Set the Environment Variable
Store the API Key in OMNIDINO_API_KEY instead of placing it directly in project source code.
Run an API Connection Test
Test /v1/models and /v1/responses first to confirm the Key, model, and endpoint are working.
Enter a Test Repository
Do not open an important production project first. Use a small Git repository to verify permissions and editing behavior.
Start Codex
Run codex and ask it to explain the README or complete a small, reviewable task.
Review Usage and the Diff
Confirm that the OmniDino request logs, balance changes, and Git diff all match your expectations.
Start here when configuration fails.
Still unable to connect Codex CLI?
Provide the operating system, Codex version, installation method, model name, Base URL, wire_api value, HTTP status code, and complete error message. Hide the API Key.
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