ByteDance

Seedream 4.5

Seedream 4.5 creates images from text and edits them from as many as 14 reference images. ByteDance emphasizes faithful preservation of faces, lighting, color, and other reference details, along with improved multi-image composition and readable dense text. The Omnipix integration returns one 2K or 4K image per request and supports preset aspect ratios or the proportions of the first reference.

How to use this model

  1. 1

    Start from a prompt alone for a new image, or attach references when a subject, layout, style, or source detail must guide the result.

  2. 2

    Use no more than 14 reference images and state the role of each one, including which details must remain unchanged.

  3. 3

    For posters, logos, or interface graphics, quote the exact visible text and describe its placement, hierarchy, and type style.

  4. 4

    Choose 2K or 4K and set a preset aspect ratio, or use Match Input Image when the first reference should define the proportions.

  5. 5

    Review the single result at full size for subject identity, small text, reference fidelity, and unintended changes before refining the prompt.

4.5Available

4.5

This Seedream 4.5 entry combines text-to-image generation and reference-guided editing. It accepts up to 14 images, offers 2K and 4K output, and can use a preset aspect ratio or match the first reference. It always returns one image per request, so create alternatives as separate generations.

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Properties

  • Supports text-to-image generation and reference-guided image editing.
  • Accepts up to 14 reference images and can match the first reference's aspect ratio.
  • Returns one image per request at 2K or 4K resolution.

How to use this model

  1. 1

    Describe a complete new scene or a focused edit in a prompt of up to 4,000 characters.

  2. 2

    Attach only the references needed for the result and identify what each contributes.

  3. 3

    State explicitly which faces, objects, colors, lighting, text, or layout details must be preserved.

  4. 4

    Select 2K or 4K and choose the final aspect ratio before generation.

  5. 5

    For Match Input Image, attach at least one reference and verify that the first image has the intended proportions.

Parameters

Prompt

prompt
Required

Describe the image to generate or the edits to apply. Maximum 4,000 characters.

Reference Images

image_input
Optional

Optional reference images for image editing and multi-reference generation. Up to 14 images.

Default: []

Resolution

resolution
Optional

Output resolution. Seedream 4.5 supports 2K and 4K.

Default: 2K

  • 2K

  • 4K

Aspect Ratio

aspect_ratio
Optional

Output aspect ratio. Match Input Image follows the first reference image.

Default: 1:1

  • 21:9

  • 16:9

  • 3:2

  • 4:3

  • 5:4

  • 1:1

  • 4:5

  • 3:4

  • 2:3

  • 9:16

  • Match Input Image