Type
Spec
Rate
Image generation
per image
$0.030
Layer decomposition
per image
$0.030
Seedream 5.0 Flash and FLUX.2 Klein 4B side by side: specs, capabilities, parameters, and live pricing from the EmpirioLabs catalog.
ByteDance 
Black Forest Labs Image GenerationSeedream 5.0 Flash from ByteDance and FLUX.2 Klein 4B from Black Forest Labs are both in the Image Generation category, available through the EmpirioLabs API.
| Spec | Seedream 5.0 Flash | FLUX.2 Klein 4B |
|---|---|---|
| Model ID | seedream-5-0-flash | flux-2-klein-4b |
| Author | ByteDance | Black Forest Labs |
| Released | Sep 28, 2026 | Jan 15, 2026 |
| Input | Text Image | Text Image |
| Output | Image | Image |
| Region | 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 5.0 Flash | FLUX.2 Klein 4B |
|---|---|---|
| prompt | string | string |
| image | array | - |
| images | array | array |
| aspect_ratio | auto, 1:1, 16:9, 9:16, 4:3, 3:4, 3:2, 2:3, 21:9 Default: auto | 1:1, 16:9, 9:16, 4:3, 3:4, 3:2, 2:3 Default: 1:1 |
| layer_decomposition | boolean Default: false | - |
| quality | 1K, 1.5K, 2K Default: 2K | - |
| size | string | string |
| use_custom_size | boolean Default: false | - |
| custom_width | 15 to 8600 | - |
| custom_height | 15 to 8600 | - |
| watermark | boolean Default: false | - |
| output_format | jpeg, png Default: png | - |
| background | opaque, transparent Default: opaque | - |
| response_format | url, b64_json Default: url | url, b64_json Default: url |
| width | - | 256 to 2048 |
| height | - | 256 to 2048 |
Mark the region to change directly on the input image with a sketch, circle, or arrow, then describe it in the prompt. For exact placement, use coordinate tags on a 0 to 1000 normalized grid:
Place the subject from image 1 <bbox>179 283 796 986</bbox> at the position in image 2 <bbox>118 331 933 871</bbox>.Set layer_decomposition to true with exactly one input image to split it into a base image plus up to 16 transparent PNG layers. Every returned image carries its stacking order as z_index, and each layer also carries its position in the base image as bounding_box.absolute and bounding_box.normalized, plus a name and a description. Leave the prompt empty to let the model choose the elements, or name the elements or coordinate regions to separate. Resolution accepts 1K, 1.5K, or 2K, and matches the input image when unset.
Every resolution tier bills at the same per-image rate, and reference images are free. Layer decomposition bills every returned image, the base image and each layer, at that same rate.
Generated images pass an automated content-safety check. An image flagged as explicit is not returned. Because the image is generated before the check runs, a flagged generation is still billed.
Supports prompt, size/aspect ratio or explicit width/height, seed, n/num_images, and reference images. Width x height must be at most 1,048,576 pixels. Examples: 1024x1024, 1344x768, 768x1344, or 2048x512. Billing is per returned image, so num_images: 4 creates and bills 4 images.
Seedream 5.0 Flash 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-5-0-flash or flux-2-klein-4b. 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-5-0-flash",
"prompt": "Describe what you want Seedream 5.0 Flash to generate."
}'Prompt tests and comparison runs that cover both models.
Seedream 5.0 Flash is the newer release (Sep 28, 2026); FLUX.2 Klein 4B was released on Jan 15, 2026. Capabilities listed only for Seedream 5.0 Flash: layer decomposition, interactive editing, multi reference, text rendering, multilingual text, transparent background. Capabilities listed only for FLUX.2 Klein 4B: reference images, seed control. The specs, rate cards, and parameters on this page come from the live EmpirioLabs catalog.
Seedream 5.0 Flash is the newer release (Sep 28, 2026); FLUX.2 Klein 4B was released on Jan 15, 2026.
FLUX.2 Klein 4B lists the lower rate for Image generation (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.
