Seedream 4.5

Overview

Seedream 4.5 is a versatile image generation and editing model from ByteDance, designed for workflows that require structured prompting, consistent composition, and controlled visual output. It supports both text-to-image generation and image-guided refinement, making it suitable for creative exploration as well as iterative design and production use.

The model performs particularly well when prompts describe layout, subject relationships, and stylistic intent in a clear, layered way. This makes Seedream 4.5 a strong choice for concept visuals, marketing assets, editorial imagery, and design-oriented content where predictability and control matter.

How it Works

Seedream 4.5 combines language understanding with image synthesis and editing capabilities, allowing it to generate new visuals or refine existing ones based on detailed instructions.

Prompt Interpretation

The model analyses prompts to understand subjects, composition, spatial relationships, style, and constraints. It responds best to prompts that describe scenes in logical layers rather than relying on short or abstract descriptions.

Image Generation

Seedream 4.5 produces images with stable structure, balanced composition, and consistent visual detail. It supports a wide range of styles, from clean illustrations to more realistic scenes, depending on how the prompt is framed.

Image Editing & Refinement

The model supports image-to-image workflows, enabling targeted edits such as adjusting objects, modifying backgrounds, or refining visual details while preserving the rest of the image.

Key Features

• Structured Prompt Handling
  Performs well with prompts that describe layout, hierarchy, and visual intent step by step.

• Image Editing Support
  Allows controlled refinement of existing images through image-to-image workflows.

• Consistent Composition
  Maintains subject placement and overall structure across variations.

• Style Flexibility
  Handles both realistic and stylised outputs within a single model.

• Design-Oriented Output
  Well suited for iterative creative workflows where predictability is important.

Technical Specifications

• Model Name: Seedream 4.5
• Model Type: Image generation and image editing
• Input: Text prompt with optional input image
• Editing Capabilities: Image-to-image transformations and targeted refinements
• Prompt Handling: Optimised for layered, descriptive prompts
• Provider: ByteDance

How to Use

1. Write a prompt describing the scene, layout, and style in a clear, structured way.
2. Optionally include an input image if you want to modify or refine existing visuals.
3. Submit the request using the Seedream 4.5 model.
4. Review the result and iterate by adjusting individual parts of the prompt.

Example Prompts

Structured scene composition
Create a modern café interior with large windows on the left, a long wooden counter running horizontally across the centre, and seating arranged along the right side. Use soft natural daylight, neutral colours, and a calm, minimal atmosphere. Keep the background uncluttered and the composition balanced.

Product-focused visual
Generate a clean product image of a wireless speaker placed on a simple pedestal. Centre the product, use soft studio lighting, and keep the background minimal with a subtle gradient. Emphasise material texture and clean edges without dramatic shadows.

Illustrative style
Illustrate a small urban park from a slightly elevated viewpoint, with simplified buildings in the background and stylised trees in the foreground. Use flat colours, gentle shading, and a clear visual hierarchy that separates foreground, midground, and background.

Image editing / refinement
Using the provided image, replace the background with a light neutral studio backdrop. Keep the subject unchanged, maintain original proportions, and adjust lighting so the subject remains evenly lit and visually consistent with the new background.

Layout-driven prompt
Design a square-format image with a large central illustration, leaving clear empty space at the top for a headline. Use a restrained colour palette and ensure the main subject does not overlap the text area.

Tips for Better Results

• Break prompts into logical parts: scene, layout, style, and constraints.
• Be explicit about what should stay the same when editing an image.
• Describe spatial relationships rather than relying on abstract style words.
• Add detail gradually to maintain control over the output.

Notes & Limitations

• Highly complex edits may require multiple iterations.
• Very subtle changes benefit from precise, focused instructions.
• Output quality depends on how clearly layout and intent are described.

Documentation

You can find full usage details, parameters, and examples here: https://runware.ai/docs/en/providers/bytedance