Seedream 4.5 [text-to-image]
ByteDance's Seedream 4.5 delivers up to 4 megapixels (2048x2048) at $0.04 per image, unifying text-to-image generation and image editing in a single architecture. Trading specialized endpoints for architectural efficiency, this model handles both creation and modification workflows without switching systems. Built for developers who need flexible image generation without managing multiple API integrations.
Built for: Product mockup generation | Marketing asset creation | Creative iteration workflows
Unified Architecture That Eliminates Endpoint Switching
Seedream 4.5 consolidates generation and editing capabilities into one model instead of forcing you to route between separate text-to-image and image-editing endpoints. This architectural decision means you can start with text prompts and move to refinement without changing API calls or managing different parameter schemas.
What this means for you:
- High-resolution output: Generate images up to 4 megapixels (2048x2048 maximum) with flexible aspect ratios between 1920px and 4096px per dimension
- Multi-image generation: Request up to 6 separate generations per API call, with the option to generate multiple variations per generation using
max_images
- Deterministic control: Set seed values to reproduce exact outputs across runs, critical for A/B testing and iterative refinement
- Safety integration: Built-in content filtering enabled by default, with the option to disable for controlled environments
Seedream 4.5 positions at the accessible end of ByteDance's model family, prioritizing cost efficiency for high-volume workflows.
| Metric | Result | Context |
|---|
| Cost per Image | $0.04 | 25 generations per $1.00 on fal |
| Max Resolution | 4MP (2048x2048) | Total pixel count between 3.7MP and 16.8MP supported |
| Batch Capability | 1-6 images | Per generation, with multi-generation support via max_images |
| Output Format | PNG via URL | Async by default, sync mode available for data URI returns |
Technical Specifications
| Spec | Details |
|---|
| Architecture | Seedream 4.5 |
| Input Formats | Text prompts with detailed natural language support |
| Output Formats | PNG images delivered via HTTPS URL or data URI |
| Resolution Range | 1920-4096px per dimension, 2560x1440 to 4096x4096 total pixels |
| License | Commercial use permitted under partner agreement |
API Documentation
How It Stacks Up
Bytedance Seedream v4 Text to Image – Seedream 4.5 represents the latest iteration with architectural refinements for prompt interpretation. Seedream v4 remains available for workflows optimized around its specific parameter set.
Bytedance Text to Image (v3) – Seedream 4.5 trades the v3 generation's approach for unified editing capabilities at the same $0.04 price point. Version 3 prioritizes pure generation workflows without integrated editing support.
Emu 3.5 Image Text to Image – Seedream 4.5 offers unified generation-editing architecture for workflow consolidation. Emu 3.5 focuses on specialized generation with distinct architectural priorities for prompt interpretation.
Hunyuan Image Text to Image – Seedream 4.5 emphasizes architectural unification across generation and editing tasks. Hunyuan v3 prioritizes generation-specific optimizations for pure text-to-image workflows.
fal-ai/bytedance/seedream/v4.5/text-to-image
