Pricing Overview

SynStar AI uses a credit-based, pay-as-you-go billing system. You top up your account balance in USD credits, and credits are deducted only when you use API models.

The billing logic is simple:

1. You top up credits to your account.
2. Some top-up amounts may include bonus credits.
3. You use supported models through an API token.
4. The API token belongs to a Token Group.
5. The Token Group is linked to a Billing Tier.
6. The Billing Tier determines the billing rate.
7. The system automatically calculates the final cost and deducts it from your balance.

Credits

SynStar AI credits are USD-denominated.

Your paid top-up amount is added to your account at a 1:1 ratio:

$1 paid = $1 base credit

For selected top-up tiers, SynStar AI may also add bonus credits to your account.

Your total credited balance may include:

Total Credits = Base Credits + Bonus Credits

Your account balance can be used across supported models and APIs.

Top-Up Rewards

SynStar AI offers top-up rewards for selected recharge amounts.

Payment Amount	Base Credits	Bonus Credits	Total Credits Added	Bonus Rate
$10	$10	$0	$10	0%
$50	$50	$0	$50	0%
$100	$100	$3	$103	3%
$500	$500	$20	$520	4%
$1,000	$1,000	$100	$1,100	10%
More than $1,000	Payment amount	12% bonus	Payment amount × 1.12	12%

For example:

Top up $100 = receive $103 credits
Top up $500 = receive $520 credits
Top up $1,000 = receive $1,100 credits
Top up $2,000 = receive $2,240 credits

Bonus credits are added to your account balance and can be used for API usage just like regular credits, unless otherwise stated.

Important: Top-Up Rewards and Billing Rates Are Different

Top-up rewards and model billing rates are two separate concepts.

Top-up rewards affect how many credits are added to your account after payment.

Billing rates affect how credits are deducted when you use models.

In other words:

Top-up reward = extra credits added after payment
Billing rate = discounted settlement applied during model usage

For example, if you top up $1,000, you receive $1,100 credits.
When you later use a model, the system still applies the correct billing rate based on your Token Group and Billing Tier.

This means you may benefit from both:

1. Bonus credits from top-up rewards
2. Discounted usage settlement through Billing Tiers

Model Pricing

Each model has its own listed usage price.

For token-based models, prices are usually displayed per 1 million tokens, such as:

• Input token price
• Output token price
• Cached input token price, if supported
• Audio token price, if supported
• Image token price, if supported

For task-based models, prices may be displayed per request, per task, per image, per video, per audio generation, or another model-specific billing unit.

The listed model price is the base price before the billing rate is applied.

Billing Tiers

SynStar AI applies different billing rates through Billing Tiers.

Billing Tier	Billing Rate	Equivalent Saving
Deep Savings Models	0.3 × listed price	Up to 70% off
Claude Models	0.5 × listed price	50% off
Standard Savings Models	0.7 × listed price	30% off

The billing rate is also called the billing multiplier.

For example, if the listed usage cost of a request is $1.00:

Billing Rate	Final Cost
0.3	$0.30
0.5	$0.50
0.7	$0.70

The final cost is deducted from your account balance in credits.

Token Groups

When creating or managing an API token, you can assign it to a Token Group.

Each Token Group is linked to a Billing Tier. The Billing Tier determines which billing rate is applied when that token is used for API requests.

Token Group	Billing Tier	Billing Rate
0.3 billing group	Deep Savings Models	0.3 × listed price
0.5 billing group	Claude Models	0.5 × listed price
0.7 billing group	Standard Savings Models	0.7 × listed price

The relationship can be understood as:

API Token → Token Group → Billing Tier → Billing Rate → Final Deduction

When an API request is made, SynStar AI automatically calculates the usage cost based on the selected model, actual usage, and the billing rate of the Token Group.

You do not need to calculate the discount manually.

How Usage-Based Billing Works

For token-based models, the base usage cost is calculated first.

Base Usage Cost =
(Input Tokens / 1,000,000 × Input Price)
+ (Output Tokens / 1,000,000 × Output Price)
+ (Cached Input Tokens / 1,000,000 × Cached Input Price)

Then the billing rate is applied:

Final Cost = Base Usage Cost × Billing Rate

The final cost is deducted from your account balance.

Example: Token-Based Billing

Assume a model has the following listed prices:

Usage Type	Listed Price
Input tokens	$2.50 / 1M tokens
Output tokens	$10.00 / 1M tokens
Cached input tokens	$1.25 / 1M tokens

A request uses:

Usage Type	Usage
Input tokens	100,000
Output tokens	20,000
Cached input tokens	0

First, calculate the base usage cost:

Input cost = 100,000 / 1,000,000 × $2.50 = $0.25
Output cost = 20,000 / 1,000,000 × $10.00 = $0.20
Cached input cost = 0

Base Usage Cost = $0.25 + $0.20 = $0.45

If this model belongs to the Deep Savings Models tier with a 0.3 billing rate, the final cost is:

Final Cost = $0.45 × 0.3 = $0.135

So the system deducts:

$0.135 credits

from your account balance.

Example: Combining Top-Up Rewards and Billing Rates

Assume you top up $1,000.

Based on the top-up reward table:

$1,000 paid = $1,100 credits

Then you use a model with a base usage cost of $1.00.

If the model belongs to the Deep Savings Models tier:

Final Cost = $1.00 × 0.3 = $0.30 credits

So your balance changes like this:

Starting balance after top-up: $1,100 credits
Usage deduction: $0.30 credits
Remaining balance: $1,099.70 credits

This example shows that top-up rewards and billing rates work together but are calculated at different stages.

Example: Comparing Different Billing Tiers

Assume the base usage cost of a request is $1.00.

Billing Tier	Billing Rate	Final Deduction
Deep Savings Models	0.3	$0.30 credits
Claude Models	0.5	$0.50 credits
Standard Savings Models	0.7	$0.70 credits

This means different Billing Tiers may have different final deductions even when the base usage cost is the same.

Task-Based Billing

Some models are not billed purely by tokens.

For example, image, video, music, voice, and other task-based APIs may be billed by:

• Request
• Task
• Image
• Video
• Audio generation
• Processing unit
• Other model-specific usage units

For task-based models, the system calculates the base cost according to the displayed task price, then applies the applicable billing rule if a billing multiplier is used for that model or Token Group.

The final deducted amount will be shown in your usage records.

Where to Check Model Prices

You can view supported models and their listed prices on the Models page.

Each model card may show information such as:

• Model name
• Provider
• Input price
• Output price
• Cached input price
• Audio price, if applicable
• Image price, if applicable
• Billing type
• Supported endpoint type

The listed price is used as the base price before the billing rate is applied.

Balance Deduction

Your credits are deducted after API usage is calculated.

The deduction amount depends on:

• The selected model
• The actual token or task usage
• The model’s listed price
• The Token Group used by your API token
• The Billing Tier linked to that Token Group
• Any model-specific billing rules

If your account balance is insufficient, API requests may fail until you top up your balance.

Notes

• Top-up rewards may be updated from time to time.
• Bonus credits are added automatically for eligible top-up amounts.
• Bonus credits cannot be withdrawn as cash.
• Used credits are non-refundable.
• Refunds, if any, may be reviewed based on payment status, usage history, account status, and applicable platform policies.

Summary

SynStar AI billing can be understood in three steps:

1. Top up credits. Eligible top-up amounts may receive bonus credits.
2. Use models through an API token assigned to a Token Group.
3. The system applies the correct billing rate and deducts the final cost from your balance.

The key formula for top-up rewards is:

Total Credits = Base Credits + Bonus Credits

The key formula for usage billing is:

Final Cost = Base Usage Cost × Billing Rate

Billing rates are:

Deep Savings Models: 0.3
Claude Models: 0.5
Standard Savings Models: 0.7

This allows you to receive extra value from eligible top-ups while accessing supported models with clear usage-based pricing and automatic discounted settlement.