Seedream 4.5 (by Bytedance)

Overview

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

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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

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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.

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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

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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

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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)

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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.

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