Start with the task · Choose a CLI

Choosing an AI coding CLI

Compare Codex, Claude Code, and Gemini CLI by your existing account, workflow, setup needs, and constraints.

Official sources checked 2026-10-21 · SuperCLI editorial guidance

The short answer

Start with a tool you can already access and evaluate its changes on one small task. Codex, Claude Code, and Gemini CLI can all assist with code. Account access, team policy, and permissions are better starting points than repository stars.

Choose by the task

Your task	Start here	Why it fits
Work on code from an existing OpenAI / Codex workflow	Codex CLI	Useful for reading and editing a local repository and extending the workflow into scripts or CI.
Make cross-file changes within a Claude Code workflow	Claude Code	Useful when you already have Claude Code access and want to connect terminal work with development tools.
Start terminal coding with a Google / Gemini account setup	Gemini CLI	Useful when Google sign-in, Gemini API credentials, or Vertex AI fits your account setup.

Matched by task, not ranked by popularity. These notes are based on official sources, not independent installation tests by SuperCLI.

Check prerequisites and limits

Codex CLI

Tool details →

When it fits: Useful for reading and editing a local repository and extending the workflow into scripts or CI.
Before you start: Confirm an available ChatGPT sign-in or another documented authentication method, then choose the installation method for your system.
Limits and tradeoffs: Capabilities and limits depend on your account and authentication method. An installed CLI alone does not guarantee offline model access.

Official sourceslearn.chatgpt.com · 1 ↗learn.chatgpt.com · 2 ↗

Claude Code

Tool details →

When it fits: Useful when you already have Claude Code access and want to connect terminal work with development tools.
Before you start: Check subscription, Console, or supported-provider access. Native and npm installation paths have different prerequisites.
Limits and tradeoffs: Do not apply one installation method's runtime requirements to every method. Review executed commands and file changes.

Official sourcescode.claude.com · 1 ↗code.claude.com · 2 ↗

Gemini CLI

Tool details →

When it fits: Useful when Google sign-in, Gemini API credentials, or Vertex AI fits your account setup.
Before you start: Current installation guidance lists Node.js 20+. Each authentication route has its own account or project setup requirements.
Limits and tradeoffs: Google sign-in, API keys, and Vertex AI have different setup and quota models. Choose a route before comparing costs.

Official sourcesgeminicli.com · 1 ↗geminicli.com · 2 ↗

Start with one small task

Choose a bounded task, such as explaining a function or adding a test, and check repository state first.
Sign in using official guidance and review file, command, and network permissions before starting.
Read the diff and run existing project checks before accepting changes. Generated code still needs verification.

Check the terms of your selected sign-in method and model service. These are workflow-based recommendations, not independent performance rankings. Installing a CLI does not grant unlimited or free model access.

Browse all tools in this category →Read our inclusion standards

Choose by the task

Check prerequisites and limits

Codex CLI

Claude Code

Gemini CLI

Start with one small task

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