Quick answer
Free Codex access, where it is offered, is a small trial allowance rather than a permanent plan. It is enough to test the workflow on a few tasks and not enough for daily agent work. Check the usage panel for the current allowance, because free tiers change more often than paid ones.
What free access covers
- A limited number of requests or a small short-window allowance.
- Access to a subset of models in most cases.
- No weekly budget to plan around, because the trial ends first.
- The same CLI and session files as a paid account.
Because the trial is small, the first long agent run usually ends it. That is the intended use: enough to see whether the workflow fits.
Free vs paid
| Free | Paid | |
|---|---|---|
| Duration | Trial | Recurring |
| Windows | Limited or none | Short + weekly |
| Model access | Restricted | Broader |
| Best for | Evaluation | Daily work |
| Cost | Zero | Subscription or credits |
Decide with your own numbers
Track one week of free usage and count the tasks you could not finish. If that number is small, a lower paid tier may be enough. If the trial ends on day one, the question is not which tier but whether Codex fits your workflow at all.
The Codex limits by plan guide explains what changes as you move up.
What the free allowance is for
Free allowances are sized for evaluation: a handful of sessions, usually on a smaller model, with tighter rate limits. They are enough to learn the workflow and not enough to plan a week of agent work.
- Test the tasks you actually do, not a hello-world.
- Note how much one real task consumes.
- Expect the limit to change without notice.
- Keep a paid fallback if work depends on it.
For the paid tiers, see Codex limits by plan; for the general landscape, see which AI coding subscription is cheapest.
Questions, answered
Is Codex free forever?
No. Free access is a limited trial where offered. Ongoing use requires a paid plan or API billing.
Does the free tier include the weekly window?
Usually not. The trial allowance is exhausted before a weekly budget matters.
Can I use the API on a free account?
API billing is separate and requires a payment method. It is not part of the free trial.