Where Should You Use Codex? A Guide to CLI, App, Cursor, and Claude Code#

2026-04-12

These days, a lot of people are saying good things about Codex. But the moment you try to actually use it, things get confusing.

• Should you use Codex CLI?
• Is there a separate Codex App?
• Should you install the Codex extension inside Cursor?
• Or is it enough to simply choose a Codex model inside Cursor chat?
• Should you connect it to Claude Code as a plugin?

I had the same questions, so I went through the official documentation and organized what I found. I tried to write this in a way that even beginners, or people who do not usually work with coding tools, can follow comfortably.

How to Add Coding Runtimes to an AI Agent Web Service#

2026-04-19

When you start designing or building an AI agent web service, one question shows up surprisingly early:

“If these agents are supposed to do real work, where does their coding ability actually come from?”

At first, it is tempting to think the answer is straightforward. Call a strong model API, add file editing, let it run shell commands, execute tests, and package the results. But once you look more closely, the problem expands fast.