> ## Documentation Index
> Fetch the complete documentation index at: https://hanabiaiinc-docs-platform-create-voice.mintlify.site/llms.txt
> Use this file to discover all available pages before exploring further.

# Pricing & Rate Limits

> Understand Fish Audio pricing plans, usage costs, and API rate limits

## API Pricing

The Fish Audio API uses pay-as-you-go pricing based on actual usage. There are no subscription fees or monthly minimums for API access.

### Text-to-Speech (TTS) Models

TTS pricing is based on the size of input text, measured in millions of UTF-8 bytes.

| Model Name | Price (USD)             |
| ---------- | ----------------------- |
| `s2-pro`   | \$15.00 / M UTF-8 bytes |
| `s1`       | \$15.00 / M UTF-8 bytes |

<Info>
  1M UTF-8 bytes is approximately 180,000 English words, or about 12 hours of speech
</Info>

### Automatic Speech Recognition (ASR) Models

| Model Name     | Price (USD)         |
| -------------- | ------------------- |
| `transcribe-1` | \$0.36 / audio hour |

**How ASR billing works:**

* Charges are based on the duration of audio processed
* Duration is rounded up to the nearest second

## Rate Limits

These limits help us ensure fair usage and maintain service quality for all users.

### Concurrent Request Limits

| Tier        | Spending Threshold | Concurrent Requests |
| ----------- | ------------------ | ------------------- |
| Starter     | \< \$100 paid      | 5 requests          |
| Elevated    | ≥ \$100 paid       | 15 requests         |
| High Volume | ≥ \$1,000 paid     | 50 requests         |
| Enterprise  | Custom             | Custom limits       |

<Tip>
  Concurrency tiers unlock as soon as your total prepaid amount reaches the threshold. You do not need to spend the full balance first. If your workload needs a higher concurrency tier, you can top up in advance to unlock the next tier immediately.
</Tip>

<Note>
  Please reach out to our team to enable enterprise volume pricing, rate limits, and billing.
</Note>

## Support

Need help? Check out these resources:

* [API Reference](/api-reference/introduction) - Complete API documentation
* [Create a Voice Clone](/api-reference/endpoint/model/create-model) - Create a voice clone model
* [Generate Speech](/api-reference/endpoint/openapi-v1/text-to-speech) - Generate realistic speech
* [Real-time Streaming](/features/realtime-streaming) - WebSocket for real-time streaming
* [Discord Community](https://discord.com/invite/dF9Db2Tt3Y) - Get help from the community
* [Support Email](mailto:support@fish.audio) - Contact our support team