SeedDream 4

Seedream 4.0 generates native 2K images in approximately 1.8 seconds, over 10x faster than Seedream 3.0 and substantially faster than most competing models at equivalent quality. At 4K resolution generation takes longer, but the 2K speed is what makes high-volume batch production practical in a single working session rather than an overnight queue.

Seedream 4.0 caps the total images per request (reference inputs plus generated outputs) at 15, and accepts up to 10 reference images as input. For a campaign team, this means supplying a brief and a handful of reference assets and receiving a full variant set (hero, lifestyle, detail, and social formats) in a single pass, rather than queuing individual generations.

Most image models pattern-match from prompts to pixel distributions. Seedream 4.0's 12-billion-parameter architecture incorporates commonsense reasoning, meaning it understands spatial relationships, compositional logic, and layout hierarchies. This is practically useful for annotated diagrams, infographic-style imagery, and complex scene assembly, outputs where element placement and relative scale matter, not just overall aesthetics.

Seedream 4.0 handles virtual try-on (placing reference garments on a model), background replacement, object removal, unwanted-text cleanup, image-to-image translation, and multi-image composition. All of these run in the same model as text-to-image generation, so you do not need a separate editing service or upload workflow. For production teams, this eliminates the tool-switching overhead that accumulates across a high-volume project.

Seedream 4.0 is optimized for speed and throughput, the right choice when you need large volumes of good-quality images fast. Seedream 4.5 is the refined quality version, with better lighting, more accurate typography at scale, and expanded editing features (including inpainting and outpainting). Both accept up to 10 reference images. If your primary constraint is time-to-asset, choose 4.0; if it's final output quality for hero creative, choose 4.5.

Yes. Seedream 4.0 can place reference garments onto a model with accurate spatial and lighting integration, making it practical for apparel e-commerce where producing on-model photography for every SKU is cost-prohibitive. The multi-reference input support means you can supply both the garment image and a model reference, and the model composes them coherently. For character consistency across a full lookbook, supply the model reference as a locked input across the batch.

Yes. Seedream 4.0 accepts text, images, or any combination as input. You can supply multiple product images, a background reference, and a lighting reference simultaneously, and the model assembles them into a composed scene. This is useful for product-in-context imagery, lifestyle composites, and multi-element advertising scenes where the source assets exist but need to be combined rather than generated from scratch.

Seedream 4.0 and Nano Banana models occupy adjacent performance tiers. Seedream 4.0's comparative strength is its unified generation-and-editing pipeline (one model handles the full workflow) and its batch throughput of up to 15 outputs per request. Nano Banana models typically offer different stylistic flexibility trade-offs. For teams that need both generation and editing in one model without managing separate services, Seedream 4.0's pipeline integration is a meaningful operational advantage.

On paid Masonry plans, Seedream 4.0 outputs are available for commercial use including advertising, marketing materials, e-commerce imagery, and brand assets. ByteDance's model usage terms govern the underlying generation. As with all AI-generated commercial assets, particularly those depicting identifiable individuals, appropriate legal review for the specific use case is advisable before publication.

Seedream 4.0 supports native output up to 4K (4096×4096). The 2K mode at 1.8 seconds per image is suitable for digital advertising, social media, and web use cases where screen pixel density is the limiting factor. 4K mode is appropriate for print applications (packaging, large-format banners, point-of-sale materials) where physical reproduction quality demands higher native resolution. For a typical campaign workflow, generating concepts at 2K and only rendering finals at 4K is an efficient approach.

SeedDream 4 is an AI image generation model from ByteDance, available inside Masonry, the AI creative agent teams use to produce marketing, product, and brand images.

Open a Masonry canvas, pick SeedDream 4 from the model selector, and describe the image you need: a product shot, an ad creative, a social post. Masonry generates it, then you refine, edit, and combine SeedDream 4 with other models in one workspace.

Yes, you can start generating images with SeedDream 4 on Masonry's free tier, then scale up with higher limits and priority processing as your team grows.

Seedream 4 rewards specific, structured prompts. Lead with the subject, then describe lighting, camera, and background separately, and use its editing mode to refine a result instead of re-rolling from scratch.

SeedDream 4 is built by ByteDance. Inside Masonry it runs alongside 50+ image and video models, so your team can pick the right one for each brief without switching tools.