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Codex CLI

OpenAI's open-source coding agent — CLI, IDE, desktop, and cloud.

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About

Codex (openai/codex, Apache-2.0, ~129k stars) is OpenAI's open-source coding agent: a terminal CLI with IDE integrations, a desktop app, and delegated cloud execution.

Fully open source under Apache-2.0 — a meaningful differentiator vs the proprietary Claude Code CLI. Very actively developed. The default agent for teams building on OpenAI models.

What it can do

  • Open-source Apache-2.0 CLI
  • IDE and desktop surfaces
  • Delegated cloud execution
  • Sandboxed tool execution
  • Very active development

Setup

  1. Install the Codex CLI per the repo README.
  2. Authenticate with your OpenAI account / API key.
  3. Run codex in a project; delegate long tasks to cloud execution.

Prerequisites

OpenAI account with API/plan access.

Use cases

codeautomation

Works with

Claude CodeCursorWindsurfAny agent (.md)

Trust score — 9/10

/10 trustVerified

Scored 9/10 (verified tier). ~129k stars, Apache-2.0, official OpenAI, very active. Fully open source where the direct competitor is proprietary. Near the top of the catalog. Verified tier.

★ 128,835 GitHub stars

How the trust score is built

Full methodology →
Adoption · stars/downloads, log-scaled vs peers
9.4/10
Maintenance · recency, releases, issue load
8.2/10
Openness · license + docs
9.7/10
Manual review · sanity read + red-flag check
9.0/10
  • · 128,835 GitHub stars (log-scaled vs catalog peers)
  • · last push 1d ago; 100 releases/12mo; 22189 open issues
  • · manual review: OpenAI's open-source Codex CLI (~129k stars); terminal/IDE/cloud surfaces; license: Apache-2.0

Sources

Every fact above was checked against these sources. Where a claim comes from the provider and couldn't be independently verified, the text says so.