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Codex CLI

coding-agent

OpenAI

OpenAI's open-source terminal agent built in Rust. Powered by GPT-5.x family, acquired 1M+ developers in its first month. Leads Terminal-Bench 2.0 at 77.3% with 240+ tok/s throughput.

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1M+ developers in first month; leads Terminal-Bench 2.0 at 77.3%

Launch Date

Feb 2026

Last Updated

Mar 2026

Stars / Users

1M+ developers

Pricing Plans

Open Source

Free

  • βœ“Full CLI agent
  • βœ“GPT-5.x Codex model
  • βœ“Multi-file editing
  • βœ“Git integration

API Usage

Pay-per-token

  • βœ“GPT-5.3 Codex access
  • βœ“240+ tok/s throughput
  • βœ“Codex App for teams

Key Features

β–ΈTerminal-native agent
β–ΈBuilt in Rust for speed
β–ΈLong-running task support
β–ΈGit push & deploy support

Platforms

macOSWindowsLinux

Supported Models

GPT-5.3 CodexGPT-4o
#coding-agent#open-source#terminal#openai
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