bytedance/seedream-4.0-t2i

seedream-4.0-t2i
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Schema

[Core Function] Seedream 4.0 T2I is an older high-definition image creation model. [Strengths] It generates high-definition images up to 4K. [Best For] Existing workflows. [Limitations] Superseded by Seedream 4.5 in fidelity and consistency. [Routing] Default to Seedream 4.5 unless 4.0 is explicitly requested.

$0.0320/img
text-to-image

Input

Image description text, supports Chinese and English. Maximum 10000 characters. We recommend keeping the prompt under 600 words. Excessively long prompts may scatter information, causing the model to overlook details and focus only on major elements, which can result in missing details in the generated image.
Image size in format 'widthxheight'. Range: Total pixels 921,600 to 16,777,216, aspect ratio 1/16 to 16
Prompt optimization mode. 'standard': high quality (longer time), 'fast': fast optimization (shorter time)
standard
Batch generation mode. 'auto': auto batch generate up to 15 images, 'disabled': generate single image only
disabled
Maximum number of images for batch generation. (input images + generated images ≤ 15)

Result

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README

Parameters

Name Description Type Required Enums
prompt Image description text, supports Chinese and English. Maximum 10000 characters. We recommend keeping the prompt under 600 words. Excessively long prompts may scatter information, causing the model to overlook details and focus only on major elements, which can result in missing details in the generated image. string Yes -
size Image size in format ‘widthxheight’. Range: Total pixels 921,600 to 16,777,216, aspect ratio 1/16 to 16 string No -
optimize_prompt_mode Prompt optimization mode. ‘standard’: high quality (longer time), ‘fast’: fast optimization (shorter time) string No standard, fast
sequential_image_generation Batch generation mode. ‘auto’: auto batch generate up to 15 images, ‘disabled’: generate single image only string No auto, disabled
sequential_image_generation_max_images Maximum number of images for batch generation. (input images + generated images ≤ 15) integer No -

Pricing

Unit: $/img

Pricing
$0.0320/img
  • bytedance/seedream-4.5-t2i: [Core Function] Seedream 4.5 T2I is a high-fidelity visual creation model. [Strengths] It provides all-round improvements in consistency, aesthetics, and photorealism, supporting high-definition outputs up to 4K resolution. [Best For] Highly recommended for: professional visual creatives, photorealistic artwork, and high-res commercial graphics. [Limitations] It lacks the real-time web search and advanced reasoning capabilities of the 5.0 Lite model. [Routing] Use this model when the priority is absolute visual fidelity, resolution (4K), and consistency without the need for real-time search.
  • bytedance/seedream-5.0-lite: [Core Function] Seedream 5.0 Lite is a smart, reasoning-enhanced image generation model with real-time web search capabilities. [Strengths] It excels at generating time-sensitive imagery, infographics, and content requiring deep world knowledge or online search, boasting superior prompt understanding and reasoning. [Best For] Highly recommended for: current-event posters, text-heavy designs, and concept art requiring complex logical reasoning. [Limitations] As a ‘Lite’ model, its absolute photorealistic aesthetic ceiling might be slightly lower than the specialized 4.5 model. [Routing] Use this model by default when the user needs real-time information, deep reasoning, or complex intent understanding in their image.
  • bytedance/seedream-4.0-i2i: [Core Function] Seedream 4.0 I2I is an older generation image-to-image editing model. [Strengths] Maintained primarily for backward compatibility and stable API contracts. [Best For] Existing legacy integrations and workflows that strictly depend on this specific model version’s quirks. [Limitations] Do NOT use this for new creations. It is a legacy model maintained for backward compatibility. [Routing] Only use if explicitly requested; otherwise use Seedream 5.0 Lite I2I.
  • bytedance/seedream-4.5-i2i: [Core Function] Seedream 4.5 I2I is a high-fidelity image editing model. [Strengths] It provides high-consistency, high-resolution style transfer and image-to-image transformations. [Best For] Highly recommended for: professional aesthetic modifications and high-resolution edits. [Limitations] Lacks the advanced reasoning of 5.0 Lite. [Routing] Use this for pure aesthetic/high-fidelity edits.
  • bytedance/seedream-5.0-lite-edit: [Core Function] Seedream 5.0 Lite Edit is a reasoning-enhanced, smart image editing model. [Strengths] It features superior cross-modal understanding and reasoning, allowing for highly accurate, interactive multi-turn image editing with real-time knowledge enhancement. [Best For] Highly recommended for: complex image editing tasks, structural modifications, and edits requiring deep semantic understanding. [Limitations] As a ‘Lite’ model, raw visual rendering might not match the 4.5 tier. [Routing] Use this model by default for complex, reasoning-based image editing tasks.

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