How to Install Codex CLI on Linux: A 15-Minute Tutorial
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TechMinds Blog Recommends đź“š Tutorials June 30, 2026 Codex CLILinuxOpenAIAI coding toolsinstallation
OpenAI released Codex CLI in 2026 — a terminal-based coding agent like Claude Code. Here’s the full install on Linux, plus 5 real workflows.
Install (Ubuntu/Debian, 15 min)
1. Install Node.js 20+
curl -fsSL https://deb.nodesource.com/setup_20.x | sudo -E bash - sudo apt install -y nodejs
2. Install Codex CLI globally
npm install -g @openai/codex
3. Authenticate
codex login
4. Verify
codex —version
Should print: 1.x.x
That’s it. Total time: 10-15 min including download. 5 Real Workflows I Tested (1 month)
- Single-file refactor codex “Refactor src/auth.js to use async/await”
- Multi-file feature codex “Add rate limiting to /api endpoints using express-rate-limit”
- Test generation codex “Write Jest tests for src/utils.js”
- Bug fix codex “Fix the race condition in src/sync.js”
- Documentation codex “Generate JSDoc comments for all functions in src/api/” Comparison vs Claude Code
FeatureCodex CLIClaude CodeModelGPT-4o / GPT-5Claude 3.5/4 SonnetSetup time15 min10 minCostPay-per-tokenPay-per-tokenBest forOpenAI ecosystemLong autonomous tasksTool ecosystemNewer, smallerMature, larger My Verdict Codex CLI is solid for OpenAI users who want a terminal coding agent. If you’re already paying for OpenAI API, this is the natural choice. Use Claude Code if: you want the most mature agent with the best tool ecosystem. Use Codex CLI if: you’re on the OpenAI stack and want terminal coding. FAQ Q: Does Codex CLI work on macOS? A: Yes, same npm install -g works. Q: Can I use GPT-4o with it? A: Yes, default is GPT-4o. You can switch to GPT-5 with codex config. Q: Is it free? A: No, pay-per-token like OpenAI API. Q: Can I use it offline? A: No, requires OpenAI API. Recommended If you’re on OpenAI stack: Codex CLI is the natural choice. If you’re on Anthropic stack: Use Claude Code. If you want local + free: Use Aider + MiMo (see other articles). Read on our network
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