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価格の確認日 2026年10月5日

確認日 5 October 2026

OpenAI Codexの料金・機能・代替（2026）

OpenAI Codexの開始価格は From $20 です。下の製品メモは、ベンダーが公開している料金のまま記しています。

Build anything with Codex.

概要

OpenAI describes Codex as a coding partner included in ChatGPT that takes on bugs, refactors, and new features, and runs many agents in parallel with computer and browser tools. The same agent is available in ChatGPT, an IDE extension, the terminal, and cloud environments that keep tasks running after the laptop is closed.

openai.com/codex/

料金

価格の起点
From $20
料金の形
Subscription
無料プラン
なし
試用
なし

https://openai.com/codex/ lists Plus at $20, Pro at $100, and Business at $20, and says Codex is included in the ChatGPT plan. The Business note on that page says for 2+ seats, billed annually. Last checked 5 October 2026.

デモ動画

Introducing the Codex app · OpenAI

機能

  • Sold to run the job rather than wait for a prompt on every step. Keep a way to stop it before it reaches a customer, a candidate, or a filing.
  • Integrations: ChatGPT, IDE extension, Terminal, Cloud environments, Plugins.
  • Not sold as one named foundation model on the pages we opened.

自律度: Autonomous. チーム規模: Solo, Small team, Mid-market.

強み

  • Published starting price: From $20.
  • Connects to ChatGPT, IDE extension, Terminal, Cloud environments.
  • Teams already on ChatGPT who want parallel coding agents and pull-request review

限界

  • No free tier and no trial listed.
  • Sold to operate the motion. Plan on supervising the first sends.

向いている人

Teams already on ChatGPT who want parallel coding agents and pull-request review

代替

同じカテゴリに並ぶほかの製品です。

OpenAI Codexの主な代替

出典

どの一覧に入るか