# Astra 2

### Model Overview

**Astra 2** is an advancement in creative diffusion-based upscaling for GenAI video, building on Astra 1 with expanded control over detail generation and stylization. It transforms AI-generated footage by adding new, dynamic detail and texture, with adjustable creativity and sharpness controls and prompt-based guidance for more precise creative direction.

Astra 2 performs best on stylized and GenAI sources, as well as wide shots and large-scale scenes where additional detail can be creatively inferred. It enhances clarity, richness, and visual complexity, and is optimized for expressive, stylized workflows.

### Key Capabilities

* Creatively transform GenAI sources with new detail and textures
* Expanded control with adjustable creativity and sharpness levels, plus prompt-based guidance
* Strong performance on stylized content, wide shots, and detail-sparse scenes

### Pricing

| Frames Per Credit — 1080p | Frames Per Credit — 4k |
| ------------------------- | ---------------------- |
| 10                        | 6                      |

### Getting Started

**Endpoint**

* [https://api.topazlabs.com/video/](<https://api.topazlabs.com/video/&#xA;>)
  * `model` — `"ast-2"`

**Model-Specific Parameters**

* `creativity` — string (`"low"` | `"middle"` | `"high"`), required
* `prompt` — string, optional
* `input_frame_count` — integer, optional; maximum 9000 *without* prompt | 450 *with* prompt
* `input_frame_rate` — integer
* `input_height` — integer
* `input_width` — integer
* `output_height` — integer
* `output_width` — integer
* `realism` — decimal from 0.0 to 1.0, optional
* `sharp` — decimal from 0.0 to 1.0, optional, default 0.5
  * Pre-enhance sharpness (0.0: Gaussian blur, 0.5: passthrough, 1.0: USM sharpening)

### Examples

<table data-card-size="large" data-view="cards"><thead><tr><th align="center"></th><th data-hidden data-card-cover data-type="image">Cover image</th><th data-hidden data-card-target data-type="content-ref"></th></tr></thead><tbody><tr><td align="center">Click to view</td><td><a href="/files/ZA7fCILFSifSNUTO8i2R">/files/ZA7fCILFSifSNUTO8i2R</a></td><td><a href="https://compare.topazlabs.com/share/video?src1=https://downloads.topazlabs.com/web-assets/model-examples/video_12.mp4&#x26;src1label=Before&#x26;src2=https://downloads.topazlabs.com/web-assets/model-examples/video_12_ast2_C4_S3.mp4&#x26;src2label=After&#x26;zoom=1.0">https://compare.topazlabs.com/share/video?src1=https://downloads.topazlabs.com/web-assets/model-examples/video_12.mp4&#x26;src1label=Before&#x26;src2=https://downloads.topazlabs.com/web-assets/model-examples/video_12_ast2_C4_S3.mp4&#x26;src2label=After&#x26;zoom=1.0</a></td></tr><tr><td align="center">Click to view</td><td><a href="/files/pvbzlmg4fPTQWf4ZID6k">/files/pvbzlmg4fPTQWf4ZID6k</a></td><td><a href="https://compare.topazlabs.com/share/video?src1=https://downloads.topazlabs.com/web-assets/model-examples/video_15.mp4&#x26;src1label=Before&#x26;src2=https://downloads.topazlabs.com/web-assets/model-examples/video_15_ast2_C4_S3.mp4&#x26;src2label=After&#x26;zoom=1.0">https://compare.topazlabs.com/share/video?src1=https://downloads.topazlabs.com/web-assets/model-examples/video_15.mp4&#x26;src1label=Before&#x26;src2=https://downloads.topazlabs.com/web-assets/model-examples/video_15_ast2_C4_S3.mp4&#x26;src2label=After&#x26;zoom=1.0</a></td></tr><tr><td align="center">Click to view</td><td><a href="/files/cWOxhqdMzMR4vVjftyhk">/files/cWOxhqdMzMR4vVjftyhk</a></td><td><a href="https://compare.topazlabs.com/share/video?src1=https%3A%2F%2Fdownloads.topazlabs.com%2Fweb-assets%2Fmodel-examples%2Fvideo_18.mp4&#x26;src1label=Before&#x26;src2=https%3A%2F%2Fdownloads.topazlabs.com%2Fweb-assets%2Fmodel-examples%2Fvideo_18_ast2_C4_S3.mp4&#x26;src2label=After&#x26;zoom=1.0">https://compare.topazlabs.com/share/video?src1=https%3A%2F%2Fdownloads.topazlabs.com%2Fweb-assets%2Fmodel-examples%2Fvideo_18.mp4&#x26;src1label=Before&#x26;src2=https%3A%2F%2Fdownloads.topazlabs.com%2Fweb-assets%2Fmodel-examples%2Fvideo_18_ast2_C4_S3.mp4&#x26;src2label=After&#x26;zoom=1.0</a></td></tr></tbody></table>


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