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

# GPU Types & Pricing

> Available GPU hardware and per-hour pricing.

## Available GPUs

| Type         | VRAM  | \$/hr  | Best for                            |
| ------------ | ----- | ------ | ----------------------------------- |
| H200         | 141GB | \$3.59 | Frontier model training             |
| H100 SXM     | 80GB  | \$2.69 | Large model training                |
| H100 PCIe    | 80GB  | \$1.99 | Large model training                |
| A100 SXM     | 80GB  | \$1.39 | General training                    |
| A100 PCIe    | 80GB  | \$1.19 | General training                    |
| L40S         | 48GB  | \$0.79 | Inference, fine-tuning, video gen   |
| L40          | 48GB  | \$0.69 | Inference, fine-tuning              |
| RTX 6000 Ada | 48GB  | \$0.74 | Workstation workloads               |
| A40          | 48GB  | \$0.35 | Cost-effective large models         |
| L4           | 24GB  | \$0.44 | Efficient inference, fast iteration |
| A10G         | 24GB  | \$0.38 | Good all-rounder                    |
| RTX 4090     | 24GB  | \$0.34 | Fast iteration                      |
| RTX 3090     | 24GB  | \$0.22 | Budget training                     |

Billed per minute. All users start with **\$10 free credit**.

## Selecting a GPU

```yaml theme={null}
gpu:
  count: 1
  type: l4
```

`cassian init` shows live availability so you only pick what is ready.

## Switching GPUs

```bash theme={null}
cassian switch
```

Interactive picker showing live availability and pricing. Your data moves with you. Volumes are cloud-backed and attach to any node.

## Auto-stop

Instances automatically stop after **30 minutes of idle time** (no GPU or CPU activity). You won't get charged for forgetting to run `cassian down`.

## Billing

* Credits are deducted per minute while your instance is running.
* If your balance reaches \$0, the instance is automatically stopped.
* If a container crashes, billing stops within 60 seconds.
* Check your balance anytime with `cassian status` or in the dashboard.