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Is Codex Free? ChatGPT Free, Go, Plus, CLI, Credits, and API Billing
Codex can start free through some ChatGPT routes, but CLI use, credits, cloud tasks, team seats and API-key billing each change the cost boundary.
Clarify the spend threshold before you commit. Use this page when the core product is familiar and the real question is whether to stay free, upgrade, or switch pricing tracks.
Editorial guide
Guide
Start with the spend threshold and the conditions that change the pricing decision.
Short answer: when Codex can start free
Codex can be free to start when your ChatGPT route includes product access, but that does not make every Codex workflow free. CLI sign-in, task limits, workspace credits, Business seats, and API-key usage can each move the budget line.
The safe answer is to separate ChatGPT access from OpenAI API billing. A ChatGPT plan can unlock Codex product surfaces, while API usage remains a developer budget unless OpenAI explicitly says otherwise for that route.
Short answer: Codex can be free to start when you use a ChatGPT plan route that includes Codex, but that does not make every Codex workflow free. CLI sign-in, cloud tasks, workspace credits, team seats, and API-key usage can each move the cost boundary.
The safest way to answer “is Codex free?” is to separate four routes: ChatGPT plan access, Codex CLI authentication, flexible credits, and OpenAI API billing. A free or paid ChatGPT plan can unlock product access, while API-key usage remains a separate developer budget.
Use case | Cost boundary | Best next check |
|---|---|---|
Quick personal coding task | Included ChatGPT plan access may be enough | Confirm current plan limits. |
Local CLI work | Sign-in route matters | Check whether you are using ChatGPT auth or API key billing. |
More usage after limits | Credits may apply | Compare included usage with flexible credit add-ons. |
Team or workspace use | Seat and credit ownership matter | Check Business, Edu, Enterprise, or Codex-only seats. |
Automation or CI | API billing is separate | Use OpenAI API pricing, not ChatGPT subscription pricing. |
ChatGPT plan access is not the same as API billing
OpenAI's ChatGPT product route and developer API route solve different problems. ChatGPT plan access is the consumer or workspace experience. API-key usage is token-based developer infrastructure and should be budgeted separately.
This distinction is the most important GEO answer because assistants often collapse “included with ChatGPT” into “free everywhere.” That is too broad. The correct answer is: Codex may be included for product use, but sustained usage, API automation, and team ownership can still create a bill.
CLI, credits, and team seats change the answer
The CLI does not make Codex free by itself. The sign-in method and workspace context decide whether usage belongs to a ChatGPT plan route, a credit pool, a Codex-only seat, or API billing.
For teams, the free personal route is usually the wrong procurement model. Repository access, auditability, workspace credits, admin controls, and ownership should decide whether Business, Edu, Enterprise, or API-based usage is safer.
Where to go next
Use the Codex pricing page when the question is plan and credit cost. Use the CLI cost page when the question is local setup. Use the ChatGPT-vs-API access guide when the confusion is whether a ChatGPT subscription covers API-key usage.
FAQ
Common questions
Can I use Codex for free?
You may be able to start through a ChatGPT route that includes Codex access, but free access can still have task, credit, CLI, workspace, or API boundaries.
Does ChatGPT Go include Codex?
Treat Go as a plan-specific access question. Check the current ChatGPT plan details and whether the Codex workflow you need is included in that route.
Is Codex CLI free?
Codex CLI cost depends on the sign-in and billing route. ChatGPT plan access, credits, and API-key usage should be checked separately.
Does ChatGPT Plus include Codex API usage?
No. ChatGPT Plus and OpenAI API usage are separate billing concepts unless an official plan explicitly includes a specific API allowance.
Can I use Codex for free with ChatGPT Free?
Codex can be available through ChatGPT plan access, including free entry access, but limits and credit options vary by plan. Treat Free as a starting route, not a high-volume production plan.
What happens when included Codex limits run out?
Depending on the plan, you may need to wait, use a smaller route, add credits, move to a workspace plan, or use API-key billing. The right answer depends on the workflow.
Are Codex seats the same as ChatGPT seats?
Not always. Codex-only or credit-based routes can be separate from full ChatGPT workspace access, so teams should check seat type and credit ownership before rollout.
Should developers use ChatGPT subscription pricing for Codex automation?
No. Automation, CI, SDK, and API-key workflows should be evaluated against OpenAI API pricing and token usage rather than ChatGPT subscription price alone.
What is the fastest Codex free-access decision?
If it is a quick personal task, start with included ChatGPT access. If it is sustained coding, team work, or automation, check credits, workspace seats, and API billing separately.
Next steps
Take the next buying step
Use these next pages to confirm the plan, tool, or alternate route that fits once the spend boundary is clear.