BusMixerPay for tokens, not seats
There is no subscription, no monthly fee and no per-seat charge. You add credit, send requests, and each request is billed from the model's published price.
Per-token billing
Input and output tokens are metered separately at the model's rate. Rates are per million tokens.
Prices in the catalog
The price shown next to a model is the final price you pay. There is no separate platform fee added at checkout.
Free models
Models marked Free cost nothing. They are useful for testing an integration before you spend credit.
How billing works
Credit is shared by every key in your account.
Add credit
Open the account page and top up. Credit is denominated in USD.
Send requests
Each successful request records the model, token counts and the amount charged. Failed requests are not billed.
Track usage
See balance, spend and recent activity in the console. Set a spend limit on each key if you need one.
Questions
Common answers before you start.
Do I need a subscription?
No. Accounts are free and you only spend the credit you add.
What happens when credit runs out?
Requests that need credit stop with an insufficient-balance error. You can top up and continue with the same key.
Can I use my existing OpenAI SDK?
Yes. Set the base URL to https://busmixer.us/api/v1 and use a BusMixer key.
Do you offer invoices?
For business accounts, contact us from the account page and we will arrange the details.
See the exact price
Browse the catalogEvery model page in the catalog lists its input and output rate.