> ## Documentation Index
> Fetch the complete documentation index at: https://docs.moxus.cloud/llms.txt
> Use this file to discover all available pages before exploring further.

# Billing

> Manage balance, top-ups, redemption codes, and billing history.

Billing manages account balance, recharge options, redemption codes, and billing history. Use [Models and pricing](/en/overview/models-and-pricing) for model prices and [Usage](/en/platform/dashboard-and-usage) for per-request details.

## Page metrics

| Metric          | Meaning                                    |
| --------------- | ------------------------------------------ |
| Current balance | Remaining usable account balance           |
| Total usage     | Historical balance consumed by the account |
| API requests    | Historical API request count               |

Billing history records balance changes such as top-ups, consumption, and refunds.

## Add balance

Common sources include:

* Online top-up through enabled payment methods.
* Redemption codes issued by the platform or an administrator.
* Platform grants or trial balance when available.

Available payment methods and minimum top-up amounts depend on platform configuration.

## Billing vs usage

| Page         | Use it for                                                  |
| ------------ | ----------------------------------------------------------- |
| Billing      | Balance changes, top-ups, and account-level billing history |
| Usage        | Per-request model, token, cost, status, and request ID      |
| Model Square | Model capabilities, pricing, and billing mode               |

## Cost controls

* Create separate API keys for each project.
* Set quota limits for tests, external tools, and automation.
* Choose models based on task complexity.
* Limit context length and maximum output length.
* Review high-cost calls in Usage regularly.

## Related docs

* [Models and pricing](/en/overview/models-and-pricing)
* [Dashboard and usage](/en/platform/dashboard-and-usage)
* [API keys](/en/platform/account-and-keys)