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OpenAI Codex CLI

by OpenAI

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Overview

Open-source terminal coding agent

Best for: Terminal-based code generation; shell command help; quick scripts; file manipulation via chat

At a glance

Pricing

Free (open source)

Difficulty
Advanced
Time to productivity
15 min
Privacy
High
Learning curve
Moderate

Ideal for

Developers comfortable with terminalopen-source enthusiastsOpenAI API users

Key capabilities

Works with

  • Code
  • shell commands

Outputs

  • Code files
  • terminal output
  • shell commands

Mobile access

How to use OpenAI Codex CLI on phones and tablets.

  • Not optimized for mobile browsers (e.g. desktop-first or CLI). Use a desktop when possible.

Free Tier

Free and open-source; uses your own OpenAI API key

Limits: Unlimited (API costs apply); rate limits based on OpenAI API tier

When to upgrade: N/A (open-source); upgrade OpenAI API tier for higher rate limits

Technical Details

Type: web
Offline: No
API: Yes
Languages: All major programming languages
Integrations: Terminal, Git, any CLI tool, shell scripts

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