Codex CLI

OpenAI's Rust-powered terminal coding agent

$20/mo Plus, $200/mo Pro cliterminalopenai

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7 /10 Expert Score

Features

Pricing

Ecosystem

Performance

About

Codex CLI is OpenAI's fast Rust-based terminal coding agent powered by GPT-5.4 and the specialized Codex-Spark model combination. Its full TUI (Terminal User Interface) provides a rich interactive experience—split panes, syntax-highlighted diffs, and progress indicators—that makes terminal AI coding feel more like a GUI tool than a command-line utility. Codex CLI features web search integration for fetching live documentation, a hooks engine for custom workflow automation (trigger scripts on file changes, test failures, or deployment events), and deep VS Code integration for seamless editing. The Rust implementation means fast startup and low memory usage, rivaling Zed's performance-first philosophy. Git-aware operations ensure changes are trackable and reversible. Pricing requires a ChatGPT Plus subscription at $20/month or Pro at $200/month for higher usage limits. The free tier offers limited daily usage suitable for evaluation. Codex CLI is best for developers already in the OpenAI ecosystem who want a fast, well-integrated terminal agent. The hooks engine is particularly valuable for teams with custom CI/CD pipelines that want to automate AI-assisted code review, testing, and deployment workflows.

Key Features

Full TUI interface
Web search integration
Hooks engine
Multi-model backend
VS Code integration
Git-aware operations

Deals, Discounts & How to Save

Many CLI tools are open source and free—you only pay for the LLM API. Use local models via Ollama for offline, zero-cost AI coding. Free tiers like Gemini CLI (1000 req/day) cover most individual developer needs without spending a cent.