Seedream

Overview

Seedream 4.0 is a new-generation image creation model from ByteDance Seed. It integrates image generation and image editing capabilities into a single, unified architecture, allowing it to handle complex multimodal tasks such as knowledge-based generation, complex reasoning, and reference consistency. The model is described as having much faster inference speed than its predecessor and can produce high-definition images at up to 4K resolution. The site highlights several capabilities: batch input and output for uploading multiple reference images and generating several outputs in one go; prompt-based editing for creating high-quality images or making precise edits with a single sentence; versatile styles including watercolor and cyberpunk; and knowledge-driven generation for educational illustrations, charts, and professional images. It also reports performance in internal benchmark MagicBench and on Artificial Analysis, with high scores in text-to-image tasks for prompt following, aesthetics, and text-rendering, and a balance between prompt following and source-image alignment in single-image editing.