AI coding tools
Codex CLI
Terminal agentOpenAI's terminal coding agent — the GPT-side answer to Claude Code.
Key facts (mid-2026)
- Maker
- OpenAI
- Pricing
- Included with ChatGPT Plus/Pro plans; or API pay-as-you-go
- Models
- GPT / o-series (OpenAI only)
- Platforms
- macOS, Linux, Windows · terminal, IDE extension, cloud
- MCP support
- Yes
- Open source
- Yes
Strengths
- Tight integration with ChatGPT subscriptions (use the plan you already pay for)
- Open-source CLI, cloud + local execution modes
- Strong on well-scoped tasks and codegen benchmarks
Weaknesses
- Locked to OpenAI models
- Younger ecosystem of workflows/plugins than Claude Code
Our verdict
Best for: ChatGPT subscribers who want an agent in the terminal without a second subscription.
If you already pay for ChatGPT, try it first; benchmark it against Claude Code on your own repo before committing.
FAQ
How much does Codex CLI cost?
Included with ChatGPT Plus/Pro plans; or API pay-as-you-go.
Which models does Codex CLI use?
GPT / o-series (OpenAI only)
Who is Codex CLI best for?
ChatGPT subscribers who want an agent in the terminal without a second subscription.
No affiliate links on coding-hub pages. Opinions from daily use; pricing approximate — check the official site.