--- title: "The Codex Handbook: A Practical Guide to OpenAI's Coding Platform" url: https://daily.dev/posts/the-codex-handbook-a-practical-guide-to-openai-s-coding-platform-vx3sgy72e source_url: https://www.freecodecamp.org/news/the-codex-handbook-a-practical-guide-to-openai-s-coding-platform type: article source: "freeCodeCamp" published: 2026-05-09T09:23:21.176Z updated: 2026-05-21T02:12:50.567Z tags: ["ai-assisted-development", "code-review", "gpt", "openai-codex"] reading_time: 87 upvotes: 1 comments: 0 language: en --- > ## Documentation Index > Fetch the complete documentation index at: https://daily.dev/llms.txt > Use this file to discover all available pages before exploring further. # The Codex Handbook: A Practical Guide to OpenAI's Coding Platform **[freeCodeCamp](https://daily.dev/sources/freecodecamp)** · 87 min read · 1 upvotes · 0 comments ## Summary A comprehensive handbook covering OpenAI Codex — the AI coding agent product built on top of OpenAI's frontier models. It explains what Codex is (a workflow layer, not just a model), its four surfaces (CLI, IDE extensions, desktop app, and Codex Cloud), and how to set it up from scratch with a hands-on Python demo. The guide covers effective prompting strategies, comparisons with Claude Code, GitHub Copilot, and self-hosted alternatives, pricing details including the new GPT-5.5 token-based rate card, enterprise security and RBAC setup, team adoption best practices, and metrics for measuring Codex effectiveness. Updated to reflect the April 2026 GPT-5.5 release. ## Full article daily.dev links to this article rather than hosting it. Read it at the original source: ## Similar posts on daily.dev - [OpenAI Releases GPT-5.3-Codex, a New Codex Model for Agent-Style Development](https://daily.dev/posts/openai-releases-gpt-5-3-codex-a-new-codex-model-for-agent-style-development-mwmmmuuiv) · Laravel News · 1 upvotes · 0 comments --- Tags: [#ai-assisted-development](https://daily.dev/tags/ai-assisted-development), [#code-review](https://daily.dev/tags/code-review), [#gpt](https://daily.dev/tags/gpt), [#openai-codex](https://daily.dev/tags/openai-codex) [View this post on daily.dev](https://daily.dev/posts/the-codex-handbook-a-practical-guide-to-openai-s-coding-platform-vx3sgy72e)