OpenAI Codex CLI: Lightweight coding agent that runs in your terminal

related demo/intro video: https://x.com/OpenAIDevs/status/1912556874211422572

this is a direct answer to claude code which has been shipping furiously: https://x.com/_catwu/status/1903130881205977320

and is not open source; there are unverified comments that they have DMCA'ed decompilations https://x.com/vikhyatk/status/1899997417736724858?s=46

by total coincidence we're releasing our claude code interview later this week that touches on a lot of these points + why code agent CLIs are an actually underrated point in the SWE design space

(TLDR you can use it like a linux utility - similar to @simonw's `llm` - to sprinkle intelligence in all sorts of things like CI/PR review without the overhead of buying a Devin or a Copilot SaaS)

if you are a Claude Code (and now OAI Codex) power user we want to hear use cases - CFP closing soon, apply here https://sessionize.com/ai-engineer-worlds-fair-2025

That's the model speed :)

Not really, they don't even give you a second to read the output before it loops back again.

If one of these tools has broad model support (like aider) it would be a game changer.

This is pretty neat! I was able to use it for few use cases where it got it right the first time. The ability to use a screenshot to create an application is nice for rapid prototyping. And good to see them open sourcing it unlike claude.