Type
Spec
Rate
Standard
per image
$0.080
Seedream 4.5 and Seedream 4.0 side by side: specs, capabilities, parameters, and live pricing from the EmpirioLabs catalog.
ByteDance Image GenerationSeedream 4.5 and Seedream 4.0 are both ByteDance models in the Image Generation category, available through the EmpirioLabs API.
| Spec | Seedream 4.5 | Seedream 4.0 |
|---|---|---|
| Model ID | seedream-4-5 | seedream-4-0 |
| Author | ByteDance | ByteDance |
| Released | Dec 3, 2025 | Sep 9, 2025 |
| Input | Text Image | Text Image |
| Output | Image | Image |
| Region | Malaysia | Malaysia |
| Endpoints | POST /v1/images/generations | POST /v1/images/generations |
| Capabilities |
Live rates from the EmpirioLabs catalog for both models. Each rate card always matches what the API charges.
Request parameters each model lists on EmpirioLabs, with the allowed values or range where one applies. A dash marks a parameter the model does not list.
| Parameter | Seedream 4.5 | Seedream 4.0 |
|---|---|---|
| prompt | string | string |
| aspect_ratio | auto, 1:1, 16:9, 9:16, 4:3, 3:4, 3:2, 2:3, 21:9 Default: auto | auto, 1:1, 16:9, 9:16, 4:3, 3:4, 3:2, 2:3, 21:9 Default: auto |
| quality | 2K, 4K Default: 2K | 1K, 2K, 4K Default: 2K |
| use_custom_size | boolean Default: false | boolean Default: false |
| custom_width | 1440 to 16384 | 720 to 16384 |
| custom_height | 1440 to 16384 | 720 to 16384 |
| image | array | array |
| images | array | array |
| batch_enabled | boolean Default: false | boolean Default: false |
| max_images | 1 to 15 Default: 4 | 1 to 15 Default: 4 |
| watermark | boolean Default: false | boolean Default: false |
| response_format | url, b64_json Default: url | url, b64_json Default: url |
| prompt_optimization_mode | - | standard, fast Default: standard |
Text-to-image, single-reference editing, and multi-reference generation from up to 14 input images, plus batch sets of up to 15 related images. Every size bills at the same flat per-image rate, and input reference images are free.
Text-to-image, single-reference editing, and multi-reference generation from up to 14 input images, plus batch sets of up to 15 related images. Every size bills at the same flat per-image rate, and input reference images are free.
Seedream 4.5 runs through POST /v1/images/generations. The request returns a job_id right away; poll GET /v1/jobs/{job_id} until the job completes and read the output URLs from the result. Or add "sync": true to skip polling: the request stays open and returns the finished OpenAI-style image response directly, so OpenAI SDKs work as-is. Both models are called through the same endpoint. Set model to seedream-4-5 or seedream-4-0. Get an API key from the EmpirioLabs dashboard.
curl https://api.empiriolabs.ai/v1/images/generations \
-H "Authorization: Bearer $EMPIRIOLABS_API_KEY" \
-H "Content-Type: application/json" \
-d '{
"model": "seedream-4-5",
"prompt": "Describe what you want Seedream 4.5 to generate."
}'Seedream 4.5 is the newer release (Dec 3, 2025); Seedream 4.0 was released on Sep 9, 2025. Capabilities listed only for Seedream 4.5: text rendering. Seedream 4.0 lists the lower rate for Standard (per image). The specs, rate cards, and parameters on this page come from the live EmpirioLabs catalog.
Seedream 4.5 is the newer release (Dec 3, 2025); Seedream 4.0 was released on Sep 9, 2025.
Seedream 4.0 lists the lower rate for Standard (per image). Both live rate cards are on this page and always match what the API charges.
Yes. Both models use POST /v1/images/generations with the same EmpirioLabs API key, so most integrations switch by changing the model value. Check the parameters table on this page first if you rely on a model-specific parameter.
Yes. Open each model in the EmpirioLabs playground and run the same prompt on both, with the parameters the API exposes.
Check out our pricing or reach out if you want your own model deployed on our stack.