OpenAI Codex is not sold as a separate standalone product. Codex access is bundled natively into ChatGPT subscriptions: from the $0 Free plan for casual testing, to ChatGPT Plus at $20/month for solo developers, ChatGPT Pro at $100, $200, or $500/month for high-volume engineers, and ChatGPT Business at $20 to $125/seat/month for collaborative teams. There are no mandatory surprise overage fees; when your plan limit is reached, prompts pause until your window resets, unless you opt to purchase flexible credits or instant resets.
Pro $200 is available for new subscriptions with a lower allowance for non-grandfathered accounts; OpenAI has not published its replacement multiplier. Eligible grandfathered subscribers keep the previous allowance through October 29, 2026 while subscribed, then move to the lower allowance. Earlier published Pro 5x and Pro 20x message estimates are historical evidence, not current five-hour caps or proof of current Pro $200 entitlement. Pro $100, $200, and $500 currently have no five-hour usage limit in Work and Codex, but still have included usage allowances. Pro $500 has the highest included Pro usage and Astra Ultrafast, with no published multiplier or model-specific message estimate. Buying credits on Pro $100 or Pro $200 does not unlock Ultrafast. OpenAI Pro tiers and transition.
Bundled with standard ChatGPT Free accounts
ChatGPT Plus covers daily individual coding
Standard ($20/$25) or Premium ($100/$125)
Prompts pause at limits; extra spend requires a purchase or auto-reload
OpenAI Codex Pricing Comparison by Plan Tier
Every plan includes the Codex CLI, the VS Code and Cursor extensions, and the ChatGPT Desktop app. What you pay for is allowance, fewer burst pauses, and queue priority.
| Plan Tier | Base Price & Billing | Codex Access | What you actually get | Overage Options | Who it suits |
|---|---|---|---|---|---|
ChatGPT Free Free limits → | $0/mo No credit card required | Included (limited baseline) | Dynamic baseline (unpublished) | Pauses at ceiling; no instant resets; credits account-dependent | Casual testing, script debugging, light triage |
ChatGPT Go Free vs Go comparison → | $8/mo Monthly (select regional markets) | Included (expanded baseline) | Higher baseline than Free (unpublished) | Pauses at ceiling; upgrade to Plus for higher tiers | Budget-conscious solo coders in supported regions |
ChatGPT Plus Plus limits → | $20/mo Monthly recurring | Included (full developer access) | Est. 5–3,000 (Codex Usage summary of OpenAI's model-specific estimates) local msgs / 5h (model-dependent) | Optional flexible credits or paid instant weekly resets | Individual developers coding daily; sweet spot for solo work |
ChatGPT Pro $100 Pro $100 limits → | $100/mo Monthly recurring | Included (5x Plus usage capacity) | 5x Plus allowance + priority peak compute | Optional flexible credits or paid instant weekly resets | Professional engineers hitting Plus limits weekly |
ChatGPT Pro $200 Pro $200 limits → | $200/mo Monthly recurring | More than Pro $100; lower than the previous allowance for non-grandfathered subscriptions. Current multiplier not published. | Previous allowance retained only by eligible accounts through October 29, 2026 | Optional flexible credits or paid instant weekly resets | Autonomous coding loops, multi-repo refactoring, heavy agent tasks |
ChatGPT Pro $500 Pro $500 limits → | $500/mo Monthly recurring; web subscriptions at launch | Highest included usage among Pro plans; exact multiplier and model-specific message estimates not published. | Astra Ultrafast included; exact multiplier and message estimates unpublished | Eligible credits after included usage; reset options depend on account | Developers needing the highest included Pro usage or Astra Ultrafast |
Business Standard Business limits → | $20–$25/seat/mo $20 billed annually ($240/yr) or $25 monthly; 2-seat min | Included per assigned seat | 5–3,000 (Codex Usage summary of OpenAI's model-specific estimates) local messages / 5h | Pooled workspace credits for overflow (no personal resets) | Small teams needing shared billing & admin seat assignment |
Business Premium Business Premium limits → | $100–$125/seat/mo $100 billed annually ($1,200/yr) or $125 monthly; 2-seat min | Included per assigned seat | No 5-hour limit (weekly reset schedule) | Pooled workspace credits for overflow (no personal resets) | Engineering teams needing continuous coding without 5h pauses |
Enterprise Enterprise overview → | Custom contract Annual invoiced agreements; custom seat tiers | Included (custom pooled allowances) | Custom negotiated limits & quarterly true-ups | Invoiced contract credits & organizational spend caps | Large engineering organizations with custom security & compliance |
Rolling 5-hour quota windows, reset clocks, and rate limits are covered in the Codex usage limits table and when usage resets.
What Each Plan Gets You for Codex (What Changes When Paying More)
Here is what actually changes at each price step:
ChatGPT Free: Baseline Entry
Requires zero payment credentials. You authenticate the Codex CLI or VS Code extension with your standard ChatGPT login. Access is dynamic and unpublished: it is designed for lightweight testing, brief bug inspections, and syntax queries. When capacity is reached, prompts pause until the reset window clears. Background cloud tasks are restricted, and paid instant resets are ineligible.
ChatGPT Plus: The Solo Developer Sweet Spot
What materially changes from Free: Plus unlocks published 5-hour rolling model allowances (summarized across models as 5–3,000 (Codex Usage summary of OpenAI's model-specific estimates) local messages depending on whether you use deep reasoning models like GPT-6 Astra or lightweight models like GPT-6 Luna). It also enables background cloud task delegation and makes your account eligible to unblock paused sessions using flexible credits or paid instant resets.
ChatGPT Pro: High-Volume & Priority Compute
What changes from Plus: Three tiers. Pro $100 is the published 5x tier. Pro $200 offers more usage than Pro $100, but non-grandfathered subscriptions receive a lower allowance than before; OpenAI has not quantified it. Pro $500 has the highest included Pro usage and adds Astra Ultrafast. Pro also gets priority in the queue at peak hours, which matters most if you are running heavy reasoning models in the middle of a working day.
ChatGPT Business: Centralized Billing & 5h Removal
What materially changes for teams: Requires a 2-seat minimum. Workspaces provide centralized corporate billing, admin console controls, and free seat reassignment between developers. Standard seats ($20–$25/mo) share Plus 5-hour limits. Business Premium ($100–$125/mo) completely removes the rolling 5-hour limit and provides 5x weekly volume, allowing engineers to code continuously without midday interruptions.
What Happens When Included Usage Runs Out?
When your 5-hour or weekly allowance hits 100%, Codex pauses subsequent prompts. There are no automatic overages by default; extra spend requires purchasing credits, purchasing a reset, or explicitly enabling automatic reload. You have three paths forward:
Wait for your rolling 5-hour window or weekly reset. Costs $0 and automatically restores capacity according to published schedules.
Buy prepaid usage credits in Settings > Usage. Credits are consumed only after included quota runs out, metered on per-token rate cards.
Personal Plus and Pro users can pay an account-specific fee at checkout to pull their next full weekly allowance forward immediately.
Upgrade or Buy Extra Usage? How to Decide
Should you stay on Plus ($20/mo) and purchase flexible credits when you hit limits, or upgrade to Pro $100, Pro $200, or Pro $500? The right choice depends on the frequency and predictability of your workload, not on an imaginary mathematical formula.
- Your heavy usage is sporadic: You only hit the 5-hour or weekly ceiling during end-of-sprint crunch periods or occasional weekend hackathons.
- You want zero recurring commitment: Paying an extra $80/month for Pro $100 every single month makes little economic sense if you only need overflow capacity 2 or 3 days a quarter.
- You primarily use lighter models: Efficient models like GPT-5.6 Luna yield wide 5-hour margins (up to 2,000 local messages), meaning standard Plus quota is usually sufficient.
- You hit limits multiple times every week: Constantly reloading credits creates administrative friction and variable per-token expenses that easily compound.
- You run autonomous agent loops: Multi-file refactors, automated test generation, and continuous background agents burn through Plus quota rapidly.
- Peak-hour latency costs you billable time: Pro grants priority compute access during peak global usage, ensuring turns do not stall during work hours.
- You heavily use frontier models: Reasoning models like GPT-6 Astra consume substantial quota per turn; Pro provides the necessary headroom.
For model-specific credit rates and how usage draws from your included allowance, see GPT-6.1 Sol credit rates and usage limits.
Which Codex Plan Should You Choose?
Match your developer profile to the most cost-effective tier:
Best choice: ChatGPT Free. Test the terminal CLI, run sanity checks, and explore Codex features without paying.
Best choice: ChatGPT Plus. It covers day-to-day interactive coding, IDE assistance, and modest background tasks.
Compare Pro $100, Pro $200, and Pro $500. Pro $200 allowance depends on grandfathering; Pro $500 has the highest included usage and Astra Ultrafast. All remain subject to usage limits.
Best choice: ChatGPT Business Standard (2-seat min). Centralized billing, shared workspace credit pool, and easy seat swapping between team members.
Best choice: ChatGPT Business Premium. Removes the rolling 5-hour limit entirely, allowing developers to code all day on high-volume weekly schedules.
Is API Pricing the Same Thing as ChatGPT Codex Pricing?
No. They are two entirely distinct products with completely separate billing systems. Confusing ChatGPT Codex subscription pricing with OpenAI Platform API token pricing is one of the most common billing misconceptions:
| Dimension | ChatGPT Codex (Subscription) | OpenAI Platform API (Developer) |
|---|---|---|
| Billing Model | Flat monthly or annual fee per account/seat ($0 to $500/mo) | Pay-as-you-go metered token rate card ($/million tokens) |
| Authentication | ChatGPT account login (OAuth session in CLI, IDE, desktop) | OPENAI_API_KEY environment variable from Platform account |
| Cost Predictability | 100% predictable; prompts pause at quota ceilings | Variable; bills directly for every token processed with no cap unless set |
| What's Included | Bundled Codex CLI, IDE extensions, Desktop app, ChatGPT web & cloud tasks | Raw model inference endpoints; developer tooling built on top |
| Surprise Overages | No automatic overages by default; paid usage requires a purchase or user-enabled automatic credit reload | Immediate charge to balance/credit card for every prompt execution |
| Best Economic Use | Daily interactive development, terminal agent turns, and IDE edits | CI/CD automated pipelines, custom scripts, or headless backend bots |
If you authenticate the Codex CLI with an OpenAI API key, requests route directly to the OpenAI Platform API instead of your ChatGPT subscription allowance. This consumes your developer API balance or bills your credit card per million tokens. To return the CLI to your standard subscription allowance, re-authenticate with ChatGPT:
Monitor Your Codex Allowance & Spending Locally
Regardless of which plan you subscribe to, keeping your remaining quota and reset timing in view prevents unexpected pauses in your workflow. Codex Usage is an independent, free local tool for macOS that tracks your rolling 5-hour and weekly capacity directly in your menu bar or terminal.
Get Codex Usage for macOS
Free & local · Zero telemetry · Reuses your CLI session
curl -fsSL https://www.codexusage.dev/install.sh | shFrequently Asked Questions
Is Codex free?
Yes, baseline Codex access is free. Anyone with a $0 ChatGPT Free account can install the official Codex CLI, VS Code extension, or ChatGPT Desktop app and run coding sessions without entering a credit card. However, Free tier allowances are restricted and dynamic, and once reached, sessions pause until the reset window clears.
Is Codex included with ChatGPT Plus?
Yes. If you pay $20/month for ChatGPT Plus, full Codex access is included at no additional charge. Plus provides an official 5-hour rolling allowance (summarized across models as 5–3,000 (Codex Usage summary of OpenAI's model-specific estimates) local messages depending on the model selected), access to cloud tasks, and the ability to purchase flexible credits or instant resets when limits are reached.
How much is Codex Pro?
OpenAI offers three Pro tiers: $100, $200, and $500/month. Pro $100 is the published 5x tier. Pro $200 has a lower allowance for non-grandfathered subscriptions, with no published replacement multiplier. Eligible subscribers keep their previous allowance through October 29, 2026. Pro $500 has the highest included Pro usage and Astra Ultrafast; its exact multiplier is not published.
What is the difference between paying for Plus, Pro, Business, or Enterprise for Codex?
ChatGPT Plus ($20/mo) is designed for solo developers coding daily under a rolling 5-hour window. ChatGPT Pro ($100, $200, or $500/mo) offers higher included usage for individual developers. Pro $200 is in an allowance transition; Pro $500 has the highest included usage and Astra Ultrafast. ChatGPT Business ($20–$125/seat/mo) adds centralized workspace billing, seat swapping, pooled credit buffers, and on Business Premium, the complete removal of the 5-hour limit. Enterprise provides custom contract pooling and advanced compliance.
Can I buy OpenAI Codex as a standalone product without ChatGPT?
No. OpenAI does not sell Codex as an isolated standalone consumer license. Codex is bundled directly into ChatGPT account plans—including Free ($0), Plus ($20/month), Pro ($100, $200, or $500/month), and Business seats. You subscribe to a ChatGPT plan, authenticate your Codex CLI or IDE extension with that account, and code against your plan allowance.
If I hit my included limit, do I need to upgrade or can I buy additional usage?
You do not need to upgrade. If you exhaust your plan allowance, you have three choices: wait for your normal 5-hour or weekly reset for free, purchase pay-as-you-go flexible credits in Settings > Usage to pay for incremental tokens, or (on personal Plus and Pro accounts) purchase a paid instant reset to pull your full weekly allowance forward immediately.
When is an upgrade economically sensible compared with staying on the current plan?
An upgrade makes financial sense based on frequency rather than a single fixed formula. Compare your actual credit or reset spending with the monthly upgrade cost: $80 more than Plus for Pro $100, $180 for Pro $200, or $480 for Pro $500. Occasional overflow may cost less than an upgrade. Pro $500 also adds Astra Ultrafast, which buying credits on Pro $100 or Pro $200 does not unlock. OpenAI has not quantified the new Pro $200 allowance or Pro $500 multiplier.
Is ChatGPT subscription Codex pricing the same as OpenAI API pricing?
No. ChatGPT subscriptions are flat-rate monthly or annual memberships ($0 to $500/mo) with bundled UI/CLI tooling and predictable quota pauses. OpenAI Platform API pricing is metered pay-as-you-go billing charged per million tokens via an API key. Authenticating the Codex CLI with an OpenAI API key bills your developer Platform balance instead of your ChatGPT subscription.
Does an annual ChatGPT subscription discount Codex?
For individual personal plans (Plus and Pro), OpenAI only bills monthly ($20/mo, $100/mo, $200/mo, or $500/mo) with no annual discount. For ChatGPT Business workspaces, annual billing discounts the seat price from $25 to $20/seat/month on Standard, and from $125 to $100/seat/month on Premium (with a 2-seat minimum).
Is there any risk of unexpected overage charges with Codex?
Standard plan limits pause usage rather than automatically starting paid overages. Charges can occur if you explicitly purchase additional usage (such as flexible credits or a paid instant reset) or enable automatic credit reload in Settings > Usage.
Where these prices come from
- Primary sources: OpenAI's published pricing and Help Center articles, including OpenAI Codex Pricing, Help Center #11369540 (Using Codex with your ChatGPT plan), Help Center #8792536 (Managing billing and seats in ChatGPT Business), and Help Center #20001507 (Paid weekly resets).
- Unpublished numbers: Where OpenAI publishes no figure — exact weekly token quotas, or a fixed message-equivalent rate for credits — this page says “Not published by OpenAI” instead of passing off a community estimate as fact.
- Your account wins: For your live allowance and reset clocks, check
/statusin your terminal or your account settings atchatgpt.com/settings/usage.
- Codex on ChatGPT Free — what you get without paying.
- ChatGPT Plus Codex limits — whether $20/mo covers your workload.
- ChatGPT Pro Codex limits — high-volume individual capacity.
- ChatGPT Business Codex limits and workspace credits — multi-seat team workspaces.
- Codex usage limits table — published message counts and model burst ranges.
- Codex credits and pay-as-you-go unblocking — how prepaid token add-ons work.
- when your Codex usage resets — exact recovery timing.