Codex
by OpenAI · openai.com ↗
OpenAI's software engineering agent that writes features, fixes bugs, and proposes pull requests from cloud sandboxes or the terminal.
ai-coding agent cloud
- Category
- Coding & Developer Tools
- Business model
- Paid
- Availability
- Global
- Launched
- 2025-05
- Record updated
- 2026-09-04
- Founded
- 2015
- Headquarters
- US
Overview
Codex is OpenAI's software engineering agent that writes features, fixes bugs, answers codebase questions, and proposes pull requests. It runs tasks in isolated cloud sandboxes preloaded with your repository, and is also available as a CLI and IDE extension for local work. Codex is included with paid ChatGPT plans, including those that use the GPT-6 Astra model family, and billed via API credits for programmatic use.
Key features
- Cloud sandboxes that run tasks against your repo
- Parallel task execution with reviewable diffs
- CLI and IDE extension for local agentic coding
- GitHub integration for automated pull requests
Use cases
- Delegating bug fixes and feature work to an agent
- Automated code review and PR preparation
- Asking questions about large codebases
Pricing
Codex access is bundled with ChatGPT Plus, Pro, Team, and Enterprise plans, with additional usage purchasable; API use is billed per token.
Frequently asked questions
What is OpenAI Codex?
Codex is OpenAI's coding agent that completes engineering tasks like features, fixes, and PRs in sandboxed environments.
How do I use Codex?
Through ChatGPT's Codex interface, the codex CLI, IDE extensions, or GitHub integration.
Is Codex included with ChatGPT?
Yes, paid ChatGPT tiers include Codex usage, with limits that scale by plan.
Similar products
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- Amp — Agentic coding tool from Sourcegraph that runs locally or in remote orbs, writing and shipping code from the terminal, editors, web, and phone.
- Augment Code — AI coding assistant and agent focused on large codebases, with context retrieval across a team's entire repository.
- Base44 — AI app builder for creating full web applications from natural-language prompts, acquired by Wix in 2025.
- Bolt.new — In-browser AI agent that builds, runs, and deploys full-stack web apps from natural-language prompts.
All Codex alternatives → · All Coding & Developer Tools products →
Sources
This record was last reviewed on 2026-09-04.
Machine-readable record: /api/products/openai-codex.json · Spot an error? Suggest a correction