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

# Pricing

Serverless API (LoRA) is billed based on **GPU instance uptime** (per-second billing). This is different from the **Model API**, which is billed **per request**.

## Pricing Overview

Serverless API (LoRA) supports two billing plans:

* **Pay as You Go**: standard hourly rates by machine tier.
* **Pro (subscription)**: **20%–30%** discount on Pay as You Go rates.

Prices and machine availability may change. Refer to [RunComfy Pricing](https://www.runcomfy.com/pricing) for the latest machine rates, plan benefits, and extras.

| Machine Type  | GPU Options | VRAM  | RAM   | vCPUs | Pay as You Go Price | Pro Price   |
| ------------- | ----------- | ----- | ----- | ----- | ------------------- | ----------- |
| Medium        | T4, A4000   | 16GB  | 16GB  | 8     | \$0.99/hour         | \$0.79/hour |
| Large         | A10G, A5000 | 24GB  | 32GB  | 8     | \$1.75/hour         | \$1.39/hour |
| X-Large       | A6000       | 48GB  | 48GB  | 28    | \$2.50/hour         | \$1.99/hour |
| X-Large Plus  | L40S, L40   | 48GB  | 64GB  | 28    | \$2.99/hour         | \$2.15/hour |
| 2X-Large      | A100        | 80GB  | 96GB  | 28    | \$4.99/hour         | \$3.99/hour |
| 2X-Large Plus | H100        | 80GB  | 180GB | 28    | \$7.49/hour         | \$5.99/hour |
| 3X-Large      | H200        | 141GB | 240GB | 24    | \$8.75/hour         | \$6.99/hour |

***

## How Billing Works

Billing is usage-based and calculated per second:

* Billing starts when an instance is signaled to wake up.
* Billing stops when the instance is fully shut down.

Your deployment can run a mix of persistent and on-demand instances, controlled by `minimum_instances` and `maximum_instances`.

### Persistent Instances

* Set `minimum_instances` > 0 to keep that many instances running.
* You are billed for the full uptime (including idle time) until you scale down.

### On-Demand Instances

* Additional instances spin up to handle demand above `minimum_instances` (or all demand when `minimum_instances` = 0).
* They scale down after the keep-warm period.
* You are billed for cold start, execution, and keep-warm time.

## Instance Cost Breakdown

* **Cold start / warm-up time**: instance boots and loads models/assets. Duration depends on machine tier, workflow complexity, and model size.
* **Execution time**: workflows run. This is the main compute time.
* **Keep-warm time**: idle time before scale-down. This time is billed.

> **Note:** You may also see **Queue Time** (waiting for resources or concurrency). Queue time is not billed.

***

## Controlling cost

* **Scale to zero:** set **minimum instances = 0** to avoid idle cost (first request may be slower due to cold start).
* **Cap concurrency:** keep **maximum instances** conservative to limit parallel capacity and spend.
* **Tune keep-warm:** shorter keep-warm lowers idle cost; longer keep-warm reduces cold starts during bursty traffic.

***

## Support

If you believe you’ve been incorrectly billed, contact [hi@runcomfy.com](mailto:hi@runcomfy.com) with your deployment ID, request ID (if applicable), and the approximate time of the issue.