Codex by OpenAI
AI that writes code for you
OpenAI Codex is a new machine learning tool that translates your text in the English language into code. Codex is designed to speed up the work of professional programmers, as well as help amateurs get started coding.
Reviews for Codex by OpenAI
Hear what real users highlight about this tool.
We use Codex for PR reviews. Easy to hook up to our repo. Codex leaves a 👀 on the PR description when the review starts and a 👍 when the review finishes. That's a delightful experience. More importantly, it has caught a few critical issues. We don't use Codex for code generation, so it's nice to have an agent that did not write the code review it.
Codex is a highly capable coding agent
Made exclusively with Codex and planning with ChatGPT.
Codex turns plain English into working code, letting me focus on solving problems instead of syntax. It’s faster and more context-aware than traditional autocomplete tools, which makes rapid prototyping effortless.
gpt-5-codex is INCREDIBLE and AI assisted programming in general has been essential to QuestionWell's success. Sonnet 4 was my daily driver but codex is SOTA now.
Helped us prototype and speed up development by turning ideas into working code faster than ever.
I am a fan of Claude Code and Codex, but need to give the shoutout to Codex. For our app, we are not using AI tools for building - too intricate and some of our own frameworks which makes it tough. We did a whole new infrastructure layer with Cloudfront proxying all connectivity to our app, WAFs and rules, Custom Error pages and headers, and all of the scripts and automation to make this happen with Codex.
When it comes to something that has a public API, Codex and Claude Code do an amazing job at building all the boilerplate, going through options, writing texts, etc. I gave this to shoutout to Codex as there were some things Claude Code did not get past and decided to try Codex and it navigated around pitfalls really well.
Great Agent for turning rough ideas into working code fast; it shaved hours off building Dozzi.
Codex helped me draft the basic structure of this project!
Having Codex appear in the OpenAI account in early June was like Christmas for adults. It sped the development of Shelf Scan by at least a factor of ten.
As a solo dev, Codex helped me save development time and write production ready code. Codex combined with Netlify autodeploy previews made my life as a solo dev a whole lot easier.
Huge thanks to Codex by ChatGPT for speeding up logic building and API wrangling. Writing tax logic with AI help = fewer bugs, more sleep. Seriously a game-changer for solo builders.
When the app was still two months away from release, I discovered Codex. Using it, I managed to complete all the remaining tasks in one night and shipped the app the very next day. It was a game changer.