Billing FAQ

Why does my balance not match what I expect?

This is normal behavior caused by the pre-deduct and reconciliation mechanism. Here is how billing works for each request:

1. Pre-deduct — before the request is sent, the system freezes an estimated cost based on model pricing and estimated token count
2. Upstream processing — the request is forwarded to the upstream provider, which returns actual usage data
3. Reconciliation — an async worker unfreezes the pre-deducted amount and deducts the real cost based on actual usage

There is a brief delay between pre-deduction and reconciliation (typically a few seconds to under a minute). During this window, your balance may appear lower than expected. Once reconciliation completes, the difference is automatically refunded.

You can query the actual billing details for any request via GET /v1/generation?id=gen-xxx.

Can I get a refund?

Unused balance is eligible for a refund. Send an email to support@chuizi.ai with your account details and reason for the refund. We will process it within 3 business days.

Balance that has already been consumed is not refundable.

How do I get an invoice?

Send an email to support@chuizi.ai with the following information:

• Company name
• Tax identification number
• Invoice amount
• Delivery preference (email for electronic invoice, or mailing address for paper)

Are there free credits?

New users receive $0.50 in free credits upon registration. That is enough to test most models. For example, $0.50 covers roughly 4.75 million input tokens with GPT-4.1-nano.

What is the minimum top-up amount?

The minimum top-up is $1. Preset amounts include $5, $20, $50, and $100. Custom amounts are also supported.

What payment methods are accepted?

Next Steps

• Billing Model — Detailed explanation of the three billing types
• Top-up & Payment — Add credits and manage payment methods
• Pre-deduct & Reconciliation — How balance freezing and reconciliation work