ChatGPT Plus vs API Calculator
See whether a flat subscription or pay-as-you-go API is cheaper for you.
Results update automatically as you type.
Result
Pay-as-you-go API is cheaper
API ~$7.09/month vs $20.00 subscription
- Messages / day
- 30
- API cost / message
- $0.00788
- API cost / month
- $7.09
- Subscription / month
- $20.00
- You save
- $12.91
A $20/month subscription is flat; the API bills per token. Enter how much you use to see which is cheaper — great for deciding between ChatGPT Plus (or Claude Pro) and building on the API.
How this is calculated
This calculator uses the business formulas described in our methodology. All figures are estimates for planning; verify current pricing with each provider before relying on them.
Worked example (defaults)
With the default inputs above, here is the result:
Result
Pay-as-you-go API is cheaper
API ~$7.09/month vs $20.00 subscription
- Messages / day
- 30
- API cost / message
- $0.00788
- API cost / month
- $7.09
- Subscription / month
- $20.00
- You save
- $12.91
Frequently asked questions
When is the subscription better?+
For heavy daily chat use, a flat subscription is usually cheaper and simpler than metered API billing.
When is the API better?+
For light or bursty use, or when you need automation, integration and control — you only pay for what you use.