Term
Seedream 4.0
Seedream 4.0 is ByteDances multimodal image model (September 2025) that processes text and multiple images as input, renders up to 4K and runs more than ten times faster than Seedream 3.0.
Seedream 4.0 — explained in more detail
Seedream 4.0 is a multimodal image model from ByteDance, released on 9 September 2025. It accepts text, a single image or multiple images as input and returns either a single image or a consistent set of images. The maximum resolution was raised from 2K to 4K compared with the previous version, at a cost of roughly USD 0.03 per image.
Technically, Seedream 4.0 relies on a new, efficient architecture and distillation techniques for acceleration. As a result, the underlying Diffusion Transformer (DiT) achieves inference more than ten times faster than Seedream 3.0. The model also shows reasoning capabilities on tasks with physical or temporal constraints, such as solving puzzles, completing crosswords or continuing comic strips. It is a proprietary model available through APIs and platforms; a successor, Seedream 4.5, was released in December 2025.
Example / In practice
An e-commerce team turns several product photos into a consistent 4K image series for a catalogue: same lighting, same style, different perspectives. Because the model combines multiple images as input and returns a coherent set, the look stays uniform across all variants.
Distinction from similar terms
Within image and video models, Seedream 4.0 positions itself as a fast, high-resolution generator with pronounced editing and multi-image capabilities, competing with models such as Google DeepMind’s Nano Banana. Compared with GPT Image 2, its focus lies less on a reasoning approach embedded in a language model and more on speed, 4K resolution and consistent image editing.