# Buy tokens through Aperture

Last validated Aug 20, 2026

Use Aperture to buy tokens for model usage. Aperture manages the tokens and the purchase flow.

Each user starts with $1 in tokens so they can test the feature immediately. You can still use Aperture with any supported provider instead of buying tokens. The chat UI starts with `openai/gpt-5.6-luna` enabled by default. After your first successful token purchase, Aperture unlocks more models for your gateway.

## Prerequisites

Before you buy tokens, confirm you meet the following requirements.

* You have an Aperture gateway.
* You have access to the **Billing** page.
* You can complete the payment flow.

## Limitations

The current release has the following limits:

* The minimum token purchase is **$10**.
* The maximum token purchase is **$25**.
* Available models depend on whether you have completed your first token purchase.
* Payments are supported from the following locations: US, CA, EU member states, GB, CH, NO, AU, NZ, SG, TW, and JP.

## Buy tokens

Open **Billing** in Aperture, then complete the purchase flow.

1. Select **Add tokens**.
2. Enter the amount to add.
3. Continue through the payment flow.
4. Complete the payment.

After payment succeeds, your balance and transaction history update in Aperture.

## Review how tokens are added

Aperture completes the purchase flow, then adds the tokens to your balance when the payment succeeds.

## Track usage and balance

Aperture deducts tokens based on the cost of your model usage. It records cost data from the model request against your balance.

Open **Billing** in Aperture to view your current token balance and recent spending.

Billing includes a transaction history that shows token purchases and automatic top-ups.

## Configure auto top-up

Auto top-up adds tokens automatically when your balance falls below the threshold you choose.

1. Open **Billing**.
2. Enable **Auto top-up**.
3. Set the balance threshold.
4. Choose the amount to add when your balance reaches that threshold.
5. Save the settings.

After a completed token purchase, Aperture uses your saved payment method for future automatic top-ups.

## Billing behavior

The billing history records token purchases and automatic top-ups.

### Charge recording

Aperture records token purchases and automatic top-ups in your billing history.

## FAQ

Use the following answers to understand the initial model access, model unlock behavior, low-balance handling, and support path.

### Why is only one model available?

New Aperture gateways begin with one model enabled so you can start chatting immediately.

### When do more models unlock?

More models become available after your first token purchase.

### What happens when my balance gets low?

If you have configured auto top-up, Aperture can add tokens automatically when your balance falls below your chosen threshold. Otherwise, add tokens from the **Billing** page.

### How can I get help?

Contact Tailscale support for help with billing, payments, or your Aperture balance.