Is Codex a separate paid product?
No. Codex isn't sold as its own subscription. It's the coding agent that ships inside ChatGPT and its editor/CLI extensions, and you get access through a paid ChatGPT plan. That means 'Codex pricing' is really 'which ChatGPT plan you're on, plus any usage beyond its limits.'
How Codex pricing actually works
Where the cost comes from
| Plan / mechanism | Roughly | What you get |
|---|---|---|
| ChatGPT Plus | $20 / month | Codex access with a standard usage allowance — fine for light, occasional use |
| ChatGPT Pro | $200 / month | Much higher Codex usage limits for heavy, all-day agentic coding |
| Business / Enterprise | Per seat | Team access with pooled/expanded limits and admin controls |
| API overage | Per token | Once you pass your plan's limits, extra usage bills against the OpenAI API by input/output tokens |
Exact allowances and rates change over time; check OpenAI's current pricing page for the latest numbers. The structure — plan + usage limits + API overage — is what stays constant.
Why the cost adds up for real coding
Agentic work burns tokens
A coding agent reads files, runs tools, and iterates — one task can be many model calls, so usage climbs quickly.
Limits push you to a higher plan
Hit the Plus allowance often and the pressure is to jump to the $200/mo Pro tier or eat API overage.
One model, one vendor
You're paying frontier-model prices for every request, including routine edits that a cheaper model handles fine.
How to run a coding agent for less
The biggest lever on cost is not being locked to a single premium model. A model-agnostic agent lets you route routine work to a cheap model (GLM, DeepSeek, Kimi) and save the expensive one for hard problems — or run a local model for free. You keep the agent workflow; you just stop paying frontier prices for everything.
FAQ
How much does Codex cost per month?
Codex itself has no separate fee — you access it through a ChatGPT plan. That's roughly $20/mo for Plus, $200/mo for Pro (with much higher limits), or per-seat Business/Enterprise pricing. Usage beyond your plan's limits is billed against the OpenAI API by tokens.
Is Codex free?
There's no fully-featured free Codex tier for real coding work — access comes with paid ChatGPT plans. If you want a coding agent you can run for free, use a model-agnostic agent with a free or local model plugged in.
Why is my Codex usage so expensive?
Agentic coding makes many model calls per task, so token usage — and any API overage past your plan limit — adds up fast, especially when every request goes to a premium model rather than a cheaper one for routine work.
How do I use Codex-style coding for less?
Use a model-agnostic coding agent that lets you plug in cheaper models (GLM, DeepSeek, Kimi) or a local model and switch per task. Wuwei is a free, open-source agent that does exactly this — bring any model and route routine work to a cheap one.