Codex
by OpenAI
At a glance
OpenAI's software engineering agent that writes features, fixes bugs, and proposes pull requests from cloud sandboxes or the terminal.
ai-coding agent cloud
- Licence
- Not recorded
- Category
- Coding & Developer Tools
- Business model
- Paid
- Availability
- Global
- Launched
- 2025-05
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.
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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.
Record details
Provenance, dates and links are kept here so the main sections stay about the product itself.
Links, dates and provenance
- Record updated
- 2026-09-04
- Founded
- 2015
- Headquarters
- US
Selection profile
Every field says where its value comes from. "Unknown" means we have not confirmed it — it does not mean the product lacks the feature.
Selection profile11 fields3 unknown
- Tasks it fits
- Writing new code Editing an existing codebase Reviewing diffs and pull requests
Derived from the record: category "coding".
Suggest a correction - How you use it
- Web app
Hosted product with no desktop/CLI tag in the record; assumed web-delivered.
Suggest a correction - Runs on
- Terminal Web
Derived from platform words in the record description/features/tags.
Suggest a correction - Where it runs
- Vendor cloud
Vendor-hosted product; no self-hosted option is recorded.
Suggest a correction - Works offline
- Not recorded
The record contains no offline-operation claim.
Suggest a correction - Official service region
- Global
Mirrors the availability field already on the record ("global").
Suggest a correction - Public API
- Yes
The record mentions an API surface.
Suggest a correction - Licence
- proprietary
Commercial product; no source licence is published in the record.
Suggest a correction - Commercial use
- Not recorded
Commercial product; the terms reviewed here do not state a non-commercial restriction, but that was not verified.
Suggest a correction - Interface languages
- Not recorded
No vendor page read in this pass states the product's own interface languages; the key exists so the field can be answered later rather than left absent.
Suggest a correction - Billing
- Subscription Free allowance: No Subscription required: Yes
Prices are the vendor’s advertised entry price and exclude taxes; always confirm on the vendor’s own page.
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Where each value comes from
- Tasks it fits
- Our inference
- How you use it
- Our inference
- Runs on
- Our inference
- Where it runs
- Our inference
- Works offline
- Our inference
- Official service region
- Our inference
- Public API
- Our inference
- Licence
- Our inference
- Commercial use
- Our inference
- Interface languages
- Unknown
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.
What does OpenAI Codex not establish?
Anyone who needs a separately published documentation or pricing page before choosing should note that this record establishes neither for OpenAI Codex, and it records no free tier.
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- Claude Code — Anthropic's agentic coding tool that works in the terminal, editing files, running commands, and completing tasks across a codebase.
- Cline — Open-source autonomous coding agent for editors and terminals that can edit files, run commands, and use the browser with your approval.
- Devin — Autonomous AI software engineer that plans and completes end-to-end development tasks in its own sandboxed workspace.
- Factory — Agent-native software development platform from Factory AI that uses Droids to plan, write, test, and ship code across the software lifecycle.
All Codex alternatives → · All Coding & Developer Tools products →
Related guides
Sources
This record was last reviewed on 2026-09-04.
Machine-readable record: /api/products/openai-codex.json · Spot an error? Suggest a correction