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

# Models and Pricing

> Detailed comparison and pricing explanation for Sora 2 models

## Model Overview

Sora 2 provides stable video generation models, distinguished by **model name** for portrait and landscape orientations.

**Model Update Notice\*\*\*\*15-second versions** are now available, offering longer video generation duration!Due to official OpenAI computing power limitations, -hd (high definition) versions are temporarily unavailable and will be relaunched when resources become sufficient.

## Available Models

## sora\_video2

**Portrait Mode - 10s**

* Resolution: 704 × 1280
* Duration: 10 seconds
* Price: \$0.15/call
* Stability: ⭐⭐⭐⭐⭐ Extremely High

## sora\_video2-landscape

**Landscape Mode - 10s**

* Resolution: 1280 × 704
* Duration: 10 seconds
* Price: \$0.15/call
* Stability: ⭐⭐⭐⭐⭐ Extremely High

## sora\_video2-15s

**Portrait Mode - 15s** ⭐

* Resolution: 704 × 1280
* Duration: 15 seconds
* Price: \$0.15/call
* Stability: ⭐⭐⭐⭐⭐ Extremely High

## sora\_video2-landscape-15s

**Landscape Mode - 15s** ⭐

* Resolution: 1280 × 704
* Duration: 15 seconds
* Price: \$0.15/call
* Stability: ⭐⭐⭐⭐⭐ Extremely High

## sora-2-pro

**HD Mode - 15s** ✨

* Resolution: 1024 × 1792 (HD)
* Duration: 15 seconds
* Price: \$0.8/call
* Stability: ⭐⭐⭐ Moderate
* Generation time: \~10 minutes
* **Async API only**

## sora-2-character

**Character Creation** 🆕

* Extract characters from videos
* Reuse via @username
* Price: \$0.01/call
* [View Character Documentation](/en/api-capabilities/sora2/character)

## Pricing Details

### Billing Method

**Per-call Billing**Charges only when video is **successfully generated**, no charge for failures.

### Price Comparison

| Model                                 | Duration | Unit Price  | Discounted Price with \$100 Top-up |
| ------------------------------------- | -------- | ----------- | ---------------------------------- |
| Portrait/Landscape                    | 10s      | \$0.15/call | ≈ ¥1.0/call                        |
| Portrait/Landscape - 15s              | 15s      | \$0.15/call | ≈ ¥1.0/call                        |
| HD (sora-2-pro)                       | 15s      | \$0.8/call  | ≈ ¥5.4/call                        |
| Character Creation (sora-2-character) | -        | \$0.01/call | ≈ ¥0.07/call                       |

**Official Comparison**OpenAI official has launched `sora-2` and `sora-2-pro` models, but:

* Expensive pricing
* Rate limits
* Requires invitation code
* Generated videos have watermarks

The advantages of choosing YeLIn AI are obvious!

## Cost Optimization Recommendations

All models have extremely high stability

Whether 10s or 15s, portrait or landscape, all models have very good stability. You can freely choose based on your needs and display scenarios without worrying about retry issues.

Batch generation optimization

* Set reasonable timeout (recommended 5 minutes)
* Download videos promptly to avoid expiration (storage validity 1 day)
* No charge for failures, retry with confidence

## Video Specifications

### Technical Parameters

| Parameter          | Value    |
| ------------------ | -------- |
| **Video Encoding** | H.264    |
| **Audio Encoding** | AAC      |
| **Frame Rate**     | 24 fps   |
| **Bitrate**        | Adaptive |
| **Format**         | MP4      |
| **Watermark**      | None     |

### Storage Information

**Important Notice**

* Videos stored on domestic CDN
* Storage validity: **Only 1 day**
* Please **download immediately** after generation and save locally
* Links will expire after 1 day

## Model Selection Recommendations

1

Determine Duration

Choose based on content needs:

* Quick previews, short content → Choose 10s version (\$0.15/call)
* Full narratives, more details → Choose 15s version (\$0.15/call)
* HD quality requirement → Choose sora-2-pro (\$0.8/call, [Async API only](/en/api-capabilities/sora2/async-api))

2

Determine Orientation

Choose based on video display scenario:

* Mobile short videos, social media portrait display → Choose portrait version
* Landscape display, widescreen content, computer playback → Choose landscape version

3

Stability Guarantee

All models have extremely high stability, no need to worry about failure retry issues, feel free to choose any combination.

## Usage Examples

### Choose Model Based on Scenario

```
# Portrait video - 10s - mobile short videos, social media
model = "sora_video2"

# Landscape video - 10s - widescreen display, computer playback
model = "sora_video2-landscape"

# Portrait video - 15s - longer story narratives
model = "sora_video2-15s"

# Landscape video - 15s - more complete content presentation
model = "sora_video2-landscape-15s"
```

## FAQ

sora-2-pro HD Model

**sora-2-pro** is our HD model:**Advantages:**

* Higher resolution: 1024 × 1792 (HD 1080P)
* 15 seconds duration
* Better image quality

**Notes:**

* Price: \$0.8/call
* Generation time: \~10 minutes
* **Async API only** (due to longer generation time)
* Recommend testing with base models first

See [Async API Documentation](/en/api-capabilities/sora2/async-api)**Base models (sora\_video2 series) have extremely high stability and can meet most use cases.**

How to get discounted prices through top-up?

Single top-up of \$100 can enjoy discounted prices:

* 10-second video approximately ¥1.0/call
* 15-second video approximately ¥1.7/call

See [Top-up Page](https://api.yelinai.com)

Will I be charged for failures?

No. Under per-call billing mode, charges only when video is **successfully generated**.

## Next Steps

## Quick Start

View example code and usage methods

## More Examples

View application examples for various scenarios