Seedream 4.5: Production-Ready AI Image Generation and Editing
ByteDance's Seedream 4.5 delivers cinematic aesthetics, stronger spatial understanding, and richer world knowledge in a unified generation-and-editing model.
From multi-image composition to precise poster typography, Seedream 4.5 is built for professional creative workflows.
Generate up to 4 megapixels per image with batch output of up to 6 variations per call.
What is Seedream 4.5?
Seedream 4.5 (Doubao-Seedream-4.5) is ByteDance's advanced image creation model, succeeding Seedream 4.0 with an all-round improvement through overall model scaling. It is designed for multi-image composition with character continuity, high-fidelity photo editing with strong detail and tone preservation, clear small-text generation for posters and branding, and cinematic visual aesthetics backed by stronger spatial reasoning and world knowledge. Compared with Seedream 4.0, version 4.5 is both more controllable for editing and more creative for concept art and design.
Multi-Image Composition
Seedream 4.5 reliably recognizes the main subject across several input images and keeps that subject visually consistent in the composed output. Whether you are merging multiple people into one scene, replacing backgrounds with multiple references, or creating brand-consistent asset sets, the model maintains stable character continuity throughout.
Extreme Original-Image Preservation
When editing existing photos, Seedream 4.5 clearly improves over Seedream 4.0 in how well it keeps the original face, lighting, and detailed structure. Portrait beautification, small-face handling, and object-level edits all preserve the integrity of the source image far more faithfully, reducing the need for manual touch-ups after AI editing.
Poster Layout and Small Text
Seedream 4.5 targets professional layout and typography tasks with clear, legible small-text generation suitable for posters, UI mockups, logo design, and branding materials. Where many models struggle with fine typography, Seedream 4.5 delivers sharp, accurately placed text that is ready for design work out of the box.
Cinematic Aesthetics
From a pure image-quality perspective, Seedream 4.5 shows noticeable improvements in cinematic quality, coherent light and shadow, and deliberate composition. Many outputs have a film-like look with controlled contrast and color grading, natural reflections and highlights, and balanced framing with leading lines and negative space.
Why Seedream 4.5 Outperforms Seedream 4.0
Seedream 4.5 is a focused evolution over 4.0 — not a complete overhaul, but a meaningful step up where professional workflows demand it most.
Seedream 4.5 Feature Highlights
The capabilities that make Seedream 4.5 a serious production tool — not just a demo model.
Text-to-Image Generation
Generate vivid, cinematic-quality images from natural language prompts. Seedream 4.5 interprets complex or layered prompts with high accuracy, supporting precise visual control and interactive editing in a single workflow.
Image Editing with Reference Images
Edit existing images using text instructions conditioned on up to 10 reference images. Replace products, copy text overlays, adjust styles, or transform scenes while maintaining visual consistency across references.
Multi-Image Composition
Compose multiple input images into a single coherent output with stable character continuity. Merge people into one scene, blend reference styles, or create composite visuals that preserve identity across sources.
Batch Generation
Request up to 6 separate generations per API call, with the option to generate multiple variations per generation. Deterministic seed values let you reproduce exact outputs across runs — critical for A/B testing and iterative refinement.
Poster and Logo Design
Generate professional poster layouts, logo concepts, and branding materials with clear, legible small text. Seedream 4.5 handles typography, whitespace planning, and visual hierarchy for design-ready output.
Portrait Beautification
Improve portrait quality with natural skin retouching, small-face handling, and lighting refinement — all while preserving the subject's identity and expression far more faithfully than previous versions.
Up to 4 Megapixels
Generate images up to 2048x2048 (4 megapixels) with flexible aspect ratios between 1920px and 4096px per dimension, suitable for print, large-format display, and high-resolution marketing assets.
Industry-Ready Applications
Optimized for professional workflows across e-commerce, film and advertising, gaming and virtual worlds, education and training, and interior and architectural design.
Seedream 4.5 Frequently Asked Questions
Everything you need to know about ByteDance's latest production-ready image model.
Start Creating with Seedream 4.5
Experience cinematic visuals, precise editing, and production-ready output with ByteDance's most capable image model. Generate, edit, and compose — all in one unified workflow.