---
title: "OpenAI Codex Pricing, Features & Alternatives (2026)"
description: "OpenAI Codex review: AI Coding Assistant tool — Free tier, plans, pros & cons, and the best OpenAI Codex alternatives compared for startups in 2026."
source: https://appstackbuilder.com/tools/openai-codex
retrieved: 2026-09-12
---

![OpenAI Codex logo](https://appstackbuilder.com/openai.svg)

[AI Coding Assistant](https://appstackbuilder.com/categories/coding-assistant)Free tier

# OpenAI Codex: Pricing, Features & Alternatives

OpenAI Codex is an agentic coding system that can read, edit, and run code across your project. It ships as an open-source CLI, IDE extensions, and a cloud agent in ChatGPT, powered by GPT-5-Codex models. The CLI is free (bring your own API key); higher usage comes with ChatGPT Plus, Pro, and Business plans or API billing.

Category

AI Coding Assistant

Pricing

Free tier available

Free tier

Yes

Best for

AI Coding Assistant — openai, codex

[Visit OpenAI Codex official site](https://openai.com/codex/)

## OpenAI Codex Pricing Plans (2026)

| Plan             | Price                           | Highlights                                                                            |
| ---------------- | ------------------------------- | ------------------------------------------------------------------------------------- |
| Codex CLIPopular | Free (open source, BYO API key) | Open-source terminal agent · Reads, edits & runs code · Bring your own OpenAI API key |
| ChatGPT Plus     | $20 / month                     | Codex cloud agent in ChatGPT · GPT-5-Codex access · Generous usage limits             |
| ChatGPT Pro      | $200 / month                    | Highest Codex usage limits · Priority access · Best for heavy agentic workflows       |

Pricing summary: Free · paid from $20/mo. Always confirm current pricing on the official site.

## Key OpenAI Codex Features

* ✓Open-source terminal agent
* ✓Reads, edits & runs code
* ✓Bring your own OpenAI API key
* ✓Works locally

### ✓ Pros

* +Powerful agentic, multi-file coding
* +Open-source CLI is free
* +Backed by GPT-5-Codex models
* +CLI, IDE, and cloud options

### ✗ Cons

* −Best limits require ChatGPT Pro ($200/mo)
* −API usage costs add up
* −Less editor-integrated than Cursor

## Best OpenAI Codex Alternatives

[Compare all ](https://appstackbuilder.com/tool-alternatives/openai-codex)

[![Cursor logo](https://appstackbuilder.com/cursor.svg)CursorFree · paid from $20/mo](https://appstackbuilder.com/tools/cursor)[![GitHub Copilot logo](https://appstackbuilder.com/github-copilot.svg)GitHub CopilotFree · paid from $10/mo](https://appstackbuilder.com/tools/github-copilot)[![Google Antigravity logo](https://appstackbuilder.com/google-antigravity.svg)Google AntigravityFree](https://appstackbuilder.com/tools/google-antigravity)[![Windsurf logo](https://appstackbuilder.com/windsurf.svg)WindsurfFree · paid from $15/mo](https://appstackbuilder.com/tools/windsurf)[![Gemini Code Assist logo](https://appstackbuilder.com/gemini.svg)Gemini Code AssistFree · paid from $22.8/mo](https://appstackbuilder.com/tools/gemini-code-assist)[![Amazon Q Developer logo](https://appstackbuilder.com/logos/amazon-q-developer.ico)Amazon Q DeveloperFree · paid from $19/mo](https://appstackbuilder.com/tools/amazon-q-developer)

## OpenAI Codex Compared

[OpenAI Codex vs Cursor](https://appstackbuilder.com/compare/cursor-vs-openai-codex)[OpenAI Codex vs Claude Code](https://appstackbuilder.com/compare/claude-code-vs-openai-codex)[OpenAI Codex vs GitHub Copilot](https://appstackbuilder.com/compare/github-copilot-vs-openai-codex)[OpenAI Codex vs Google Antigravity](https://appstackbuilder.com/compare/google-antigravity-vs-openai-codex)[OpenAI Codex vs Windsurf](https://appstackbuilder.com/compare/openai-codex-vs-windsurf)[OpenAI Codex vs Gemini Code Assist](https://appstackbuilder.com/compare/gemini-code-assist-vs-openai-codex)

## OpenAI Codex FAQ

What is OpenAI Codex used for?⌄

OpenAI Codex is a ai coding assistant tool. OpenAI’s agentic coding tool — a terminal CLI, IDE extension, and cloud agent powered by GPT-5-Codex models.

Is OpenAI Codex free?⌄

Yes — OpenAI Codex has a free tier you can start with, and paid plans for more usage and features.

How much does OpenAI Codex cost?⌄

OpenAI Codex offers a free tier, with paid plans starting at $20/month.

What are the best OpenAI Codex alternatives?⌄

Popular OpenAI Codex alternatives include Cursor, GitHub Copilot, Google Antigravity, Windsurf, Gemini Code Assist. Compare pricing and features on our OpenAI Codex alternatives page.

## Not sure if OpenAI Codex fits your stack?

Get a free, AI-powered tech stack tailored to your budget, app type, and team size — including the best ai coding assistant pick for you.

[Build my stack free ](https://appstackbuilder.com/)