Codex by OpenAI

AI that writes code for you

★★★★★ 5.0/5 from 20 reviews

What is Codex by OpenAI?

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.

Tool Details

Categories AI Coding Agents
Website openai.com
Became Popular August 10, 2021
Platforms Web

Recent Reviews (3)

J
JJ Sep 30, 2025
★★★★★

Even with new models around, Codex remains one of the most reliable AI coding assistants—fast, structured, and still very useful.

W
Wojciech Oct 30, 2025
★★★★★

Still the fastest way to get a working regex or a complex utility function from a single-line comment.

T
Tadashi Jan 4, 2026
★★★★★

OpenAI Codex has become an essential part of our development workflow. With our AGENTS.md providing project context, Codex understands our monorepo architecture and coding conventions, autonomously handling implementations that would take hours manually. Code reviews are faster and more thorough as Codex catches edge cases and potential issues we might miss. The ability to run tasks in parallel and work autonomously in the background has dramatically increased our development velocity. Thank you for building such a powerful coding agent!

Frequently Asked Questions about Codex by OpenAI

When did Codex by OpenAI become popular?

Codex by OpenAI became popular around August 10, 2021.

What is Codex by OpenAI's overall user rating?

Codex by OpenAI has an overall rating of 5.0/5 based on 20 user reviews.

What type of tool is Codex by OpenAI?

Codex by OpenAI belongs to the following categories: AI Coding Agents.

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