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GENERATION API CALLS
Image Model Generation
Bytedance

Bytedance

This page is auto-generated from model configurations. Last updated: 2026-09-01.

This reference lists all available Bytedance image generation models and their parameters. Use these parameter names when calling the Generation API.

Dreamina 3.1

Section titled “Dreamina 3.1”

ByteDance’s creativity-focused model for stylized outputs.

Model ID: model_bytedance-dreamina-3-1

Capabilities: txt2img

LLM Markdown: https://app.scenario.com/api/models/model_bytedance-dreamina-3-1/markdown

Parameter Type Required Default Min Max Allowed Values Description
prompt string Yes - - - - Text prompt for image generation
aspectRatio string No 4:3 - - 9:21, 9:16, 2:3, 3:4, 1:1, 3:2, 4:3, 16:9, 21:9, custom Image aspect ratio. Set to ‘custom’ to specify width and height.
resolution string No 2K - - 1K, 2K Image resolution quality
width number No 1328 512 3024 - Image width (only used when aspect_ratio is ‘custom’)
height number No 1328 512 3024 - Image height (only used when aspect_ratio is ‘custom’)
seed number No - - - - Use a seed for reproducible results. Leave blank to use a random seed.

Seedream 4.0 Edit

Section titled “Seedream 4.0 Edit”

Model ID: model_bytedance-seedream-4-editing

Capabilities: txt2img, img2img

LLM Markdown: https://app.scenario.com/api/models/model_bytedance-seedream-4-editing/markdown

Parameter Type Required Default Min Max Allowed Values Description
referenceImages file_array No `` - - - Input image(s) for image-to-image generation. List of 1-14 images for single or multi-reference generation.
prompt string Yes - - - - Text prompt for image generation
size string No 4K - - 4K, 2K, 1K Output resolution. 1K for low quality, 2K for medium quality, 4K for high quality.
aspectRatio string No auto - - 1:1, 4:3, 3:4, 16:9, 9:16, 3:2, 2:3, 21:9, auto Image aspect ratio. ‘Auto’ preserves the original aspect ratio but does not upscale image resolution.
sequentialImageGeneration string No disabled - - disabled, auto Off: always generates one image. On: The model may generate a set of related images (story steps, variations, or alternatives), up to your chosen Max Images parameter.
maxImages number No 1 1 15 - The maximum number of images the model can generate in one sequence. Total image count (input +generated) cannot exceed 15.

Seedream 4.5 Edit

Section titled “Seedream 4.5 Edit”

Model ID: model_bytedance-seedream-4-5-editing

Capabilities: txt2img, img2img

LLM Markdown: https://app.scenario.com/api/models/model_bytedance-seedream-4-5-editing/markdown

Parameter Type Required Default Min Max Allowed Values Description
referenceImages file_array No `` - - - Input image(s) for image-to-image generation. List of 1-10 images for single or multi-reference generation.
prompt string Yes - - - - Text prompt for image generation
size string No 4K - - 4K, 2K Image resolution: 2K (2048px), 4K (4096px).
aspectRatio string No auto - - 1:1, 4:3, 3:4, 16:9, 9:16, 3:2, 2:3, 21:9, auto Image aspect ratio. ‘Auto’ preserves the original aspect ratio but does not upscale image resolution.
sequentialImageGeneration string No disabled - - disabled, auto Off: always generates one image. On: The model may generate a set of related images (story steps, variations, or alternatives), up to your chosen Max Images parameter.
maxImages number No 1 1 15 - The maximum number of images the model can generate in one sequence. Total image count (input + generated) cannot exceed 15.

Seedream 5.0 Lite

Section titled “Seedream 5.0 Lite”

Model ID: model_bytedance-seedream-5-0-lite

Capabilities: txt2img, img2img

LLM Markdown: https://app.scenario.com/api/models/model_bytedance-seedream-5-0-lite/markdown

Parameter Type Required Default Min Max Allowed Values Description
prompt string Yes - - - - Text prompt for image generation
referenceImages file_array No `` - - - Input image(s) for image-to-image generation.
width number No 2048 1024 6240 - Custom image width (only used when size is set to ‘Custom’). Range: 1024-6240 pixels.
height number No 2048 1024 6240 - Custom image height (only used when size is set to ‘Custom’). Range: 1024-6240 pixels.
sequentialImageGeneration string No disabled - - disabled, auto Off: always generates one image. On: The model may generate a set of related images (story steps, variations, or alternatives), up to your chosen Max Images parameter.
maxImages number No 1 1 15 - The maximum number of images the model can generate in one sequence. Total image count (input + generated) cannot exceed 15.

Seedream 5.0 Pro

Section titled “Seedream 5.0 Pro”

ByteDance Seedream 5.0 Pro generates and edits high-resolution images up to 2K, with support for multiple reference images and custom dimensions.

Model ID: model_bytedance-seedream-5-0-pro

Capabilities: txt2img, img2img

LLM Markdown: https://app.scenario.com/api/models/model_bytedance-seedream-5-0-pro/markdown

Parameter Type Required Default Min Max Allowed Values Description
prompt string Yes - - - - Describe the image you want to create, including any text that should appear in it.
referenceImages file_array No - - - - Optional images to generate from or edit (up to 10). Leave empty to create from your prompt alone.
width number No 2048 672 3136 - The exact width of the image in pixels (672-3136). Used only when Resolution is set to Custom.
height number No 2048 672 3136 - The exact height of the image in pixels (672-3136). Used only when Resolution is set to Custom.
optimizePromptMode string No standard - - standard, fast Whether the model reasons about the prompt before generating. Standard gives higher quality but is slower; Fast is faster and is usually enough when a reference image already sets the composition. Costs the same either way.
background string No opaque - - opaque, transparent Whether the output keeps a transparent background. Requires exactly one reference image, which must itself carry an alpha channel. Ignored otherwise.

Seedream 5.0 Pro Layerize

Section titled “Seedream 5.0 Pro Layerize”

Split an image into a base layer plus independently editable transparent PNG layers — drag, scale, and rearrange elements downstream.

Model ID: model_bytedance-seedream-5-0-pro-layerize

Capabilities: img2img

LLM Markdown: https://app.scenario.com/api/models/model_bytedance-seedream-5-0-pro-layerize/markdown

Parameter Type Required Default Min Max Allowed Values Description
image file Yes - - - - The image to split into a base layer plus editable element layers. Exactly one image; input is free.
prompt string No - - - - -
size string No auto - - auto, 1K, 1.5K, 2K Output resolution tier for the base image and layers. Auto keeps the input aspect ratio and adapts size from the source. Higher resolution costs more per layer.
optimizePromptMode string No standard - - standard, fast Whether the model reasons about the prompt before splitting the image. On gives a more faithful decomposition but is slower; Off is faster. Costs the same either way.