Codex

Overview

Codex is like Claude Code but its from OpenAI.

Start Here

• OpenAI Developers - Codex Developers Hub
• ChatGPT Quickstart - Official guide to getting started with ChatGPT
• Getting Started with Codex - OpenAI Youtube video
• Codex Use Cases - Official OpenAI examples for using Codex across common workflows
• Codex Use Cases for Engineers - OpenAI Academy resource on engineering use cases
• Codex CLI GitHub - Official open source repository for the Codex CLI
• Models in ChatGPT - Official guide to choosing ChatGPT models
• GPT-5.6 - OpenAI announcement and overview of GPT-5.6
• Codex OSS mode - Use the Codex App, CLI, and SDK with open source models through local providers like Ollama or LM Studio

Learning Path

• Codex Fundamentals - OpenAI Academy event covering practical Codex development workflows
• Learn 95% of OpenAI Codex in 30 minutes - YouTube video
• Codex Cookbook - Practical Codex examples and recipes
• GPT-5.6 Prompting 101 - AI Guides article on outcome-first prompting, model and reasoning controls, reusable prompt templates, and common mistakes
• How OpenAI Uses Codex - PDF guide on OpenAI's internal usage

Practices And Workflows

• Leveraging Codex in an agent-first world - Humans steer. Agents execute.
• Codex for almost everything - OpenAI article on using Codex across different workflows
• Tips for long-running agents that do real work - Shell + Skills + Compaction
• Codex CLI Cheat Sheet - Shipyard quick reference for Codex CLI commands and workflows
• codex-cli-best-practice - Community repository of Codex CLI best practices, workflows, and setup examples

Extensibility

Skills

Codex can use skills ported from Claude Code, but review them for Claude-specific tool dependencies and replace those with Codex-compatible commands, scripts, or workflows.

• OpenAI Skills - OpenAI repository of example skills for AI agents
• Awesome Codex Skills - Curated GitHub collection of Codex skills, resources, and tools

Subagents And Tasks

• Codex Subagents - Official OpenAI documentation for creating and using Codex subagents
• Awesome Codex Subagents - Curated GitHub collection of Codex subagents

Tools And Extensions

• Codex App - Desktop app for working with Codex on development tasks
• Codex Security Plugin - OpenAI guide for running Codex Security scans from Desktop Codex or Codex CLI

Communities And News

• Builders Community - Codex Builders Community
• Codex subreddit - Reddit community for Codex users