Seedream 4.5

Seedream 4.5 API Overview

Seedream 4.5 represents ByteDance's latest advancement in generative AI, delivering high-fidelity 4K images with exceptional prompt adherence and editing precision. This model excels in realistic rendering, multi-subject consistency, and professional workflows, making it ideal for creators seeking photorealistic outputs from text descriptions.

Technical Specifications​

• Input Support: Up to 14 reference images (JPEG, PNG, WEBP, BMP, TIFF, GIF, HEIC, HEIF).
• Output Resolution: Native 2K to 4K rendering with flexible aspect ratios.
• Architecture: Unified framework for text-to-image generation and advanced editing, scaled for improved semantic understanding and typography.

Performance Benchmarks

Seedream 4.5 demonstrates top-tier results on internal metrics, outperforming predecessors in prompt alignment, aesthetics, and editing accuracy. It achieves higher ELO ratings for realism and consistency, with cleaner high-resolution outputs and fewer corrections needed. Benchmarks highlight its edge in photorealism, text rendering, and logical scene inference over models like Seedream 4.0.

Key Features

• Enhanced Prompt Interpretation: Accurately processes complex scenes, spatial relationships, multi-person interactions, and action cues for precise visual results.​
• Superior Image Consistency: Maintains subject identity, lighting, and details across multi-angle views and image sets, minimizing artifacts.​
• Advanced Editing Tools: Seamlessly blends reference images, refines details like skin tones and textures, and supports professional multi-image fusion.​
• Realistic Rendering: Improved shadows, light falloff, material simulation, and text clarity, including dense typography in multiple languages.

Seedream 4.5 API Pricing

• $0.042 per image

Code Sample

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Comparison with Other Models

vs Seedream 4.0: 4.5 offers stronger image and character consistency, enhanced text clarity, multi-image fusion with up to 14 inputs (versus fewer in 4.0), and faster generation speeds, providing more reliable high-resolution 4K outputs.

vs Midjourney v6: While Midjourney excels in artistic stylization, Seedream 4.5 offers superior control over text integration and subject consistency across batches. It’s better suited for commercial workflows requiring brand-safe, editable outputs.

vs DALL·E 3: DALL·E 3 leads in prompt understanding for abstract or conceptual tasks. Seedream 4.5, however, delivers higher native resolution  and supports multi-reference image fusion.