# Billing

Flux uses **Chinese Yuan (CNY / ￥)** as the billing unit. **Prices displayed in the [model marketplace](https://tryflux.net/models) are the final billing prices (unit: CNY / 1M tokens or per request).**

## How Prices Are Calculated

Token-billed models charge for input, output, and cache usage. Check both the unit and the applicable context-length tier; `1M Token` in the marketplace means 1,000,000 tokens. Other billing methods, such as image generation, follow the individual model's price description.

### Group Multiplier

Different API key groups may have different multipliers. The multiplier is applied to the model's base price, and the marketplace already shows the adjusted price, which is the final unit price deducted from your balance.

<div style="text-align: center;">
  <img src="https://docs.tryflux.net/images/billing/model-pricing.png" alt="Group multiplier badge in the model marketplace, with per-model input and output prices that already include the multiplier" />
</div>

Multipliers and client restrictions differ from group to group. Check [Core Concepts](https://docs.tryflux.net/en/docs/concepts.md#groups-that-need-attention) and the group description in the model marketplace before choosing.

A group is a property of an API key and is unrelated to subscription plans.

**Calculation Example**

These hypothetical prices are not a current quote for any model. All prices are in **CNY (￥) per 1M tokens**:

| Item   | Base price (￥/1M) | Group multiplier | Final unit price (￥/1M) |
| ------ | ----------------- | ---------------- | ----------------------- |
| Input  | 2.50              | 0.3              | 0.75                    |
| Output | 15.00             | 0.3              | 4.50                    |

Suppose a request generates 10,000 input tokens and 2,000 output tokens, with no cache usage or Fast Mode, and all tokens fall within the price tier above:

```text
Input cost = 10,000 / 1,000,000 × 0.75 = 0.0075 CNY (￥0.0075)
Output cost = 2,000 / 1,000,000 × 4.50 = 0.0090 CNY (￥0.0090)
Total cost = 0.0165 CNY (￥0.0165)
```

For actual calculations, use the final prices in the [model marketplace](https://tryflux.net/models), which already include the multiplier. For cached requests, check whether the protocol's input count includes cached tokens and which cache read/write prices apply. Refer to the [usage logs](https://tryflux.net/usage) for actual charges.

## Purchase & Payment Methods

Top up anytime on the [top-up page](https://tryflux.net/purchase).

### Usage-Based (Recommended)

Billed directly from your CNY balance based on actual token consumption. Balance has no expiration date.

- Supports domestic mobile payments including **WeChat Pay and Alipay**.
- **1 CNY = ￥1.00 Account Balance**, with zero hidden fees and no intermediate token conversion.

### Subscriptions / Plans

If you activate a subscription plan, requests consume the expiring plan quota first, falling back to your regular balance when the plan quota is exhausted.

## Related Pages

- [Core Concepts](https://docs.tryflux.net/en/docs/concepts.md) - groups, account pools, and billing order
- [Model Marketplace](https://tryflux.net/models) - prices for every model
- [Top-up Center](https://tryflux.net/purchase) - account top-up and balance management
- [Referral Rewards](https://docs.tryflux.net/en/docs/flux/referral.md) - earn rewards by inviting friends