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Seedream 4.0 - AI Image Generator

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Achieve Flexible Image Generation and Editing with Seedream 4.0

Achieve Flexible Image Generation and Editing with Seedream 4.0

Seedream 4.0 is the fourth image model developed by ByteDance's Seed Team, officially released on September 9, 2025, and is an iterative version of Seedream 3.0. Its outstanding advantage lies in integrating image generation and editing functions into a more unified system, while also having stronger multimodal reasoning capabilities, reference image support, flexible aspect ratio processing, and an output size of up to 4K, which can meet the needs of more complex visual creation workflows.

Use Seedream 4.0 for Image Generation Now

How to Use the Seedream 4.0 AI Model

1

Create Multimodal-Adapted Prompts

Describe the subject, scene, style, and expected editing results, ensuring the content clearly corresponds to the generation or editing requirements. The advantage of Seedream 4.0 is that the prompt can not only clarify what to create, but also specify which parts need to be retained, replaced, expanded, or optimized.

2

Upload Reference Image

If the goal is not just re-generation, but transformation, expansion, or controlled editing, the source image needs to be uploaded. If combining text and image instructions, ensure the reference image clearly presents the structure or subject that the model needs to reference.

3

Generate AI Results

After generation is complete, check whether the model has completed the required modifications while retaining the key structure. If necessary, adjust the prompt to clearly distinguish between fixed and editable elements, then regenerate.

FAQs

What is the difference between Seedream 4.0 and previous Seedream versions?

The official release positions it as the fourth-generation model, with the core feature of more unified handling of generation and editing functions, rather than isolated image creation.

Is Seedream 4.0 suitable for reference image workflows?

Yes, reference image support is one of the core highlights of this release.

Can Seedream 4.0 generate 4K images?

The official release emphasized support for output sizes up to 4K.

Should I use Seedream 4.0 for editing or creation?

Both are possible. This unified positioning of creation and editing is one of the main reasons to use it.

Is Seedream 4.0 better than Seedream 4.5 in all scenarios?

If you need flexible generation and editing functions and do not prioritize the latest typography and consistency optimizations of version 4.5, it can still be used as an all-round choice.

Which prompts are most suitable for Seedream 4.0?

Prompts that can distinguish the subject, visual style, scene, and editing intent usually work better than single vague sentences.

Can Seedream 4.0 help with image expansion or re-composition?

Yes, its adaptability to editing makes it suitable for structure adjustment needs, such as adjusting the composition range or performing controlled composition editing.

Does Seedream 4.0 support the combined use of text and image instructions?

Yes, this release emphasized support for text, image, and mixed input workflows.

Is Seedream 4.0 a suitable choice for creators who need flexible aspect ratios?

Yes, adaptive aspect ratio support is one of the core features explicitly mentioned in this release.

When should I choose Seedream 4.0 over Kling v2.1?

If you prioritize static image generation and editing control over a broader ecosystem of image and video creators, then choose Seedream 4.0.