doubao-seedance-4-5

Seedream 4.5 API is ByteDance's advanced text-to-image model available through APIMart. It features 4K resolution output, industry-leading text rendering accuracy, support for up to 10 reference images, batch generation of 1-15 images, and unified generation plus editing in one model. These capabilities make it ideal for marketing, e-commerce, and content creation.

Getting started is simple: 1) Sign up for a free APIMart account, 2) Add funds to your balance, 3) Generate your API key from the dashboard, 4) Make a POST request to /v1/images/generations with your prompt. Check our documentation for code examples in Python, JavaScript, and cURL.

Seedream 4.5 API costs 0.25 Credits(~$0.025) per generated image through APIMart. When using batch generation (n=1-15), you're billed per image produced. No subscription fees, no minimum commitments - pay only for what you use. This makes it one of the most affordable 4K image generation APIs available.

For best results: Use natural language with structure (Subject + Style + Details). Be specific rather than vague. For text in images, use double quotes like "Your Text". Include style references (watercolor, cyberpunk, photorealistic). Avoid overloading prompts - concise descriptions often work better than complex ones.

Upload up to 10 reference images via URLs in your API request. Seedream 4.5 extracts style elements, character features, and visual themes to maintain consistency. Use cases include brand asset matching, character series, product line consistency, and style transfer applications.

Seedream 4.5 supports output resolutions up to 4K and offers multiple aspect ratios to fit different use cases — from square 1:1 for social media profiles to 16:9 for presentations and banners. You can specify the desired dimensions in your API request, making it easy to generate images optimized for any platform or print format.