Seedream 4.5

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seedream-4.5

ByteDance|Created Dec 24, 2025

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Seedream 4.5 is the newest proprietary image generation model from ByteDance. Compared to Seedream 4.0, it offers substantial overall improvements—particularly in editing consistency, where it better maintains subject details, lighting, and color tones. The model also delivers enhanced portrait clarity and improved small-text rendering. Its ability to compose multiple images has been significantly upgraded, and advances in both inference performance and visual aesthetics allow for more accurate and artistically expressive image creation.

Overview Specifications Activity Performance Uptime Examples API Reference

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Endpoints and request shape

This page collects the public integration surface for the model: supported endpoints, available request parameters, and example calls through the NagaAI API.

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Code Example

Example code for using this model through our API with Python (OpenAI SDK) or cURL. Replace placeholders with your API key and model ID.

Basic request example. Ensure API key permissions. For more details, see our documentation.

from openai import OpenAI

client = OpenAI(base_url="https://api.naga.ac/v1", api_key="YOUR_API_KEY")

resp = client.images.edit(
    model="seedream-4.5",
    image=open("image.png", "rb"),
    prompt="A cute baby sea otter wearing a beret",
    n=1,
    size="1024x1024",
    response_format="url"
)
print(resp.data)

Supported Parameters

Available parameters for API requests

Size