# OpenAI Codex — AI Compare Ninja

> OpenAI's agentic coding tool (CLI, IDE extension, cloud agent), billed via ChatGPT plans or the API.

## Overview
- **Category:** Development & Code (Coding assistants & IDEs)
- **Status:** Active · checked - Active.
- **Paid from:** 20 $ per user per month billed annually (25 $ per user per month billed monthly; from 2 users) / per user per month, billed annually or monthly (Business)
- **Free access:** Free plan
- **Website:** https://openai.com/codex/
- **Canonical URL:** https://www.aicompare.ninja/en/tool/openai-codex

## What it does
- Agentic coding via CLI, IDE extension, web/cloud, and iOS
- GPT-6 Astra for demanding coding and repository tasks (rollout in progress)
- Read repositories, propose changes, and carry out tasks
- Billed through ChatGPT plans (Free through Pro/Business) or the API
- Included with a ChatGPT subscription; no separate Codex fee

## In brief
OpenAI Codex is OpenAI’s agentic coding tool (CLI, IDE, cloud, iOS). With GPT-6 Astra, OpenAI targets more demanding coding and multi-step workflows; access is rolling out on a limited basis first.

Usage is tied to a ChatGPT plan or the API, not a separate Codex subscription. Plan limits are in the pricing table.


## Limits
Prices are on the official Codex pricing page (learn.chatgpt.com/docs/pricing), not the ChatGPT card. Enterprise/Edu on request. Also, accessible via a personal API key, billed at standard API token rates instead of a subscription. Listed separately from ChatGPT and Claude Code. Codex Pro costs 100, 200, or 500 USD a month. Astra Ultrafast is only on the highest plan. Codex is not the ChatGPT seat.

## Pricing tiers
| Tier | Price | Period | What you get |
| --- | --- | --- | --- |
| Free | free | Month | Explore Codex on quick coding tasks |
| Go | 8 $ | Month | Lightweight coding tasks |
| Plus | 20 $ | Month | Web, CLI, IDE, iOS, cloud review, Slack |
| Pro 100 | 100 $ | Month | 100 USD a month. Codex shares the ChatGPT Pro allowance. Ultrafast is not included. |
| Pro 200 | 200 $ | Month | 200 USD a month. Codex shares the ChatGPT Pro allowance. Ultrafast is not included. |
| Pro 500 | 500 $ | Month | 500 USD a month. Astra Ultrafast is included on this Pro plan. Codex shares the ChatGPT Pro allowance. |
| Business | 20 $ per user per month billed annually (25 $ per user per month billed monthly; from 2 users) | per user per month, billed annually or monthly | SSO/MFA, no training on business data by default |

## Sources
All details regarding plans, limits, and features are based on official vendor documentation and the primary sources verified below.

- https://learn.chatgpt.com/docs/pricing
- https://openai.com/codex/
- https://developers.openai.com/api/docs/guides/latest-model
- https://developers.openai.com/api/docs/models/gpt-6-astra
- https://help.openai.com/en/articles/6825453-chatgpt-plus-faq
- https://deploymentsafety.openai.com/gpt-6-astra
- https://openai.com/index/path-to-astra/

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*Source: AI Compare Ninja (2026) - https://www.aicompare.ninja/en/tool/openai-codex*