How Much Does Codex Cost?

Codex is bundled into existing ChatGPT plans — there is no separate subscription. ChatGPT Pro, Business, Enterprise, and Plus users all have access at no additional cost during the initial rollout period. OpenAI has stated it will introduce rate-limited access and flexible on-demand pricing options after this introductory phase, but specific tier pricing has not been publicly documented yet.

Context

Codex's pricing model splits into two tracks: the ChatGPT-integrated product and the API.

ChatGPT product (Codex in the sidebar): Included with your existing ChatGPT subscription. Pro ($200/mo), Business ($25/user/mo), Enterprise (custom), and Plus ($20/mo) users can all access Codex. During the research preview, OpenAI offered generous usage at no extra charge. Long-term, expect rate limits that vary by plan tier, with the option to purchase additional usage on demand.

API (codex-mini-latest): For developers building on the Codex model directly, codex-mini-latest is available through the Responses API at:

• $1.50 per 1M input tokens
• $6.00 per 1M output tokens
• 75% prompt caching discount

Free API credits: Plus subscribers who sign into Codex CLI with their ChatGPT account can redeem $5 in free API credits, while Pro subscribers get $50 — both valid for 30 days.

For a full breakdown of capabilities across plans, see our complete Codex guide.

Practical Steps

1. Already on ChatGPT Pro, Business, or Enterprise? Open ChatGPT, find Codex in the sidebar, and start using it immediately
2. On ChatGPT Plus? You have access as well — Codex was expanded to Plus users in June 2025
3. Want API access? Use codex-mini-latest via the Responses API — enable prompt caching to cut input costs by 75%
4. Using Codex CLI? Sign in with your ChatGPT account to automatically redeem your free API credits ($5 for Plus, $50 for Pro)

Related Questions

• What is Codex?

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