# OpenAI Codex CLI

#1 on Terminal-Bench with GPT-5-series. OpenAI Codex CLI is freemium — a usable free tier with paid plans above it, at openai.com.

## Facts

- **Pricing tier:** Free tier + paid
- **Works on:** CLI, Web, In-app
- **Works in browser:** No

## Capabilities

- #1 on Terminal-Bench with GPT-5-series
- Runs in terminal, IDE or the cloud
- Sandboxed autonomous edits
- Included with ChatGPT plans

## FAQ

### What is OpenAI Codex CLI?

OpenAI Codex CLI is listed under Terminal & CLI Agents, in the Code & Development category on Flocci AI Tools. #1 on Terminal-Bench with GPT-5-series. It is freemium — a usable free tier with paid plans above it, and it lives at openai.com.

### Is OpenAI Codex CLI free?

OpenAI Codex CLI is freemium: there is a free tier you can work in and paid plans above it. It is one of 426 freemium tools in the catalog, all labelled the same way so you are never surprised by a paywall.

### Can I use OpenAI Codex CLI in a browser, or is there an app?

OpenAI Codex CLI needs to be installed or self-hosted — it doesn't run in a browser tab. It is available on the command line, the web and inside another product.

### What can OpenAI Codex CLI do?

OpenAI Codex CLI does 4 things the catalog singles out: #1 on terminal-bench with gpt-5-series; runs in terminal, ide or the cloud; sandboxed autonomous edits; included with chatgpt plans.

### What is the best free alternative to OpenAI Codex CLI?

Aider is the closest free alternative: it sits in the same Terminal & CLI Agents sub-category and is free. Cline, Crush and Gemini CLI also start free. The full list is on the alternatives page.

## Related

- [OpenAI Codex CLI alternatives](https://aitools.flocci.in/alternatives/openai-codex-cli)
- [Terminal & CLI Agents](https://aitools.flocci.in/category/code-development/terminal-cli-agents)
- [Best free terminal and CLI coding agents](https://aitools.flocci.in/best/best-terminal-cli-agents)
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Source: Flocci AI Tools — https://aitools.flocci.in/tool/openai-codex-cli

Facts last verified: October 2026