# Seedream 4.5 (by Bytedance)

### **Overview**

A new-generation image creation model with enhanced quality and multi-image blending capabilities.

***

### **Quick facts**

* **Modes:** Text → Image · Image → Image (editing) · Images → Image (multi-image blend)
* **Outputs / sizes:** 1024×1024 (1:1), 1280×720 (16:9), 720×1280 (9:16) — higher when selecting 2K/4K
* **Aspect ratios:** 21:9, 16:9, 4:3, 3:2, 1:1, 2:3, 3:4, 9:16, 9:21

***

### **What it's great for**

* High-quality photoreal images with improved generation fidelity.
* Multi-image blending and composition (up to 10 input images).
* Image editing, inpainting, and style transfer tasks.
* High-resolution 4K asset creation.

***

### **Parameters (editor-ready)**

| Name              | Type   | Default      | Notes                                                                                                                                             |
| ----------------- | ------ | ------------ | ------------------------------------------------------------------------------------------------------------------------------------------------- |
| `Prompt`          | Text   | —            | Required                                                                                                                                          |
| `Reference Image` | Upload | Optional     | Used for edits and variations (up to 10 images for multi-image mode)                                                                              |
| `Aspect Ratio`    | Select | Square (1:1) | Square (1:1), Landscape (16:9), Landscape (4:3), Landscape (3:2), Portrait (2:3), Portrait (3:4), Portrait (9:16), Ultra-wide (21:9), Tall (9:21) |
| `Resolution`      | Select | 2K           | 2K, 4K                                                                                                                                            |

***

### **Modes**

| Mode           | Estimated time | Required inputs         | Typical use                        |
| -------------- | -------------- | ----------------------- | ---------------------------------- |
| Text → Image   | \~25 seconds   | Prompt                  | High-resolution generation         |
| Image → Image  | \~25 seconds   | Reference Image, Prompt | Inpainting & edits                 |
| Images → Image | \~25 seconds   | Multiple Images, Prompt | Multi-image blending & composition |

***

### **Output options**

| Option       | Values / notes                                                  |
| ------------ | --------------------------------------------------------------- |
| Aspect ratio | Square (1:1), Landscape (16:9), Portrait (9:16), and more       |
| Resolution   | 2048×2048 (Square), 2048×1152 (Landscape), 1152×2048 (Portrait) |

***

### **Prompt tips**

* Use photographic tokens for realism.
* Describe lighting, camera angles, and mood for cinematic results.
* For multi-image blending, describe how elements should combine in your prompt.

***


---

# Agent Instructions: Querying This Documentation

If you need additional information that is not directly available in this page, you can query the documentation dynamically by asking a question.

Perform an HTTP GET request on the current page URL with the `ask` query parameter:

```
GET https://docs.flora.ai/models/image-models/seedream-4.5-by-bytedance.md?ask=<question>
```

The question should be specific, self-contained, and written in natural language.
The response will contain a direct answer to the question and relevant excerpts and sources from the documentation.

Use this mechanism when the answer is not explicitly present in the current page, you need clarification or additional context, or you want to retrieve related documentation sections.