Seedream 4.0: Multimodal Image Generation System

The September 24 2025 paper is a technical report from **ByteDance Seed** detailing the **Seedream 4.0** system, an advanced multimodal image generation model. This single framework efficiently unifies **text-to-image synthesis**, image editing, and multi-image composition. The core innovation is an efficient **diffusion transformer** and powerful VAE that facilitates fast generation of **high-resolution images (up to 4K)**, outperforming competitors like GPT-4o and Gemini 2.5 in human and automatic evaluations. The system uses sophisticated training techniques, including **multi-modal post-training** and adversarial acceleration methods, to achieve state-of-the-art results and **ultra-fast inference speed**. Seedream 4.0 is designed for both creative and professional applications, featuring capabilities like **in-context reasoning** and advanced text rendering.Source:https://arxiv.org/pdf/2509.20427

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