Seedream API: Seedream 5.0, 4.5 and 4.0
Seedream API on APIMart gives developers every ByteDance Seedream model, from Seedream 5.0 Pro, Lite and Flash to Seedream 4.5 and 4.0, for text-to-image, image editing and multi-reference work through one API key at 20% off list price.
Seedream API Models
All Seedream models share the same APIMart key and per-image billing. Open a model for resolutions, reference image limits, batch options, live pricing and code examples.
Seedream 5.0 Pro API
Seedream 5.0 Pro is ByteDance's quality-first text-to-image model, served on APIMart as seedream-5-0-pro. Seedream 5.0 Pro generates cinematic 1K, 1.5K, and 2K images—or exact pixel sizes—with industry-leading text rendering, multi-reference style fusion, and unified generation plus editing. Everything Seedream 5.0 Pro does happens in a single seedream-5-0-pro API call, so teams adopt seedream-5-0-pro in minutes.
1K / 1.5K / 2KText RenderingCinematic QualityReference ImagesImage EditingView API & pricing →Seedream 5.0 Lite API
Seedream 5.0 Lite delivers ByteDance's cutting-edge text-to-image generation. Create 4K resolution images with precise text rendering, multi-reference style fusion, and unified editing capabilities.
4K GenerationText RenderingBatch ProcessingReference ImagesImage EditingView API & pricing →Seedream 5.0 Flash API
Seedream 5.0 Flash is ByteDance's fast, lower-cost text-to-image model, served on APIMart as seedream-5-0-flash. Seedream 5.0 Flash generates cinematic 1K, 1.5K, and 2K images—or exact pixel sizes—at one per-image price, with strong text rendering, multi-reference style fusion, and unified generation plus editing. Built for batch jobs and rapid iteration, Seedream 5.0 Flash runs in a single seedream-5-0-flash API call, so teams adopt seedream-5-0-flash in minutes.
1K / 1.5K / 2KText RenderingCinematic QualityReference ImagesImage EditingView API & pricing →Seedream 4.5 API
Seedream 4.5 API delivers ByteDance's cutting-edge text-to-image generation. Create 4K resolution images with precise text rendering, multi-reference style fusion, and unified editing capabilities.
4K GenerationText RenderingBatch ProcessingReference ImagesImage EditingView API & pricing →Seedream 4.0 API
Seedream 4.0 API is ByteDance's unified text-to-image and image editing model. Generate 4K images with industry-leading text rendering, batch processing, and multi-reference support.
4K GenerationText RenderingBatch ProcessingReference ImagesImage EditingView API & pricing →
Which Seedream API Version to Use
Seedream 5.0 Pro for top quality
Quality-first 1K–2K cinematic images with precise text and up to 10 references, plus layer splitting; reference images and layers are priced separately.
Seedream 5.0 Lite for 4K batches
4K images with advanced text rendering, batches of up to 15 and up to 10 reference images, with 2K, 3K and 4K output.
Seedream 5.0 Flash for speed
1K, 1.5K or 2K cinematic images with precise text and up to 10 references, built for faster turnaround on high-volume jobs.
Seedream 4.5 and 4.0 for proven 4K
Seedream 4.5 adds precise text rendering and multi-reference batches at 2K or 4K, while Seedream 4.0 offers 1K–4K text-to-image and editing with batch output.
Seedream API FAQ
How to get a Seedream API key?
Sign up for APIMart, open the API Keys page in your dashboard and create a key. The same key calls every Seedream model on this page and the rest of the 190+ models, with pay-as-you-go billing and no subscription.
What is the difference between Seedream 5.0, 4.5 and 4.0?
Seedream 5.0 comes in Pro (quality first, 1K–2K, layer splitting), Lite (up to 4K, batches of 15) and Flash (1K–2K, faster). Seedream 4.5 focuses on precise text at 2K/4K, and Seedream 4.0 covers 1K–4K generation and editing.
How is Seedream API pricing calculated?
Seedream models are billed per generated image; Seedream 5.0 Pro also prices reference images and layer splitting separately. Live prices are on each model page, and every model is 20% off list price, up to 28% with membership.
How do I call the Seedream API?
Send a request with the Seedream model name, your prompt and options such as size, count or reference image URLs. Each model page has a playground plus Form and JSON request examples, and full docs are at docs.apimart.ai.
Does the Seedream API support image editing and references?
Yes. Seedream models accept reference images for editing and consistent results: Seedream 5.0 Pro, Lite and Flash take up to 10 references, and Seedream 4.5 and 4.0 support multi-reference and batch output.
Is the Seedream API free?
No. APIMart has no free credits for Seedream; it is pay as you go with no subscription, and failed generations are not billed. Membership discounts range from 20% to 28% off list price.