Flux Srpo
Playground
Try it on WavespeedAI!FLUX SRPO [dev] is a 12-billion-parameter flow transformer that generates high-quality, aesthetically rich images from text prompts for personal and commercial use. Ready-to-use REST inference API, best performance, no coldstarts, affordable pricing.
Features
FLUX SRPO
FLUX SRPO is a high-quality image generation model that creates stunning visuals from text descriptions. Built on the FLUX architecture with SRPO optimization, it delivers exceptional detail, composition, and artistic quality at an affordable price.
Why It Stands Out
- High-quality generation: Produces sharp, detailed images with excellent composition and aesthetics.
- Prompt Enhancer: Built-in AI-powered prompt optimization helps craft better descriptions for improved results.
- Flexible resolution: Customize width and height independently for any aspect ratio.
- Fine-tuned control: Adjust guidance scale and inference steps to balance quality and creativity.
- Multiple output formats: Export as JPEG or PNG based on your needs.
- Reproducibility: Use the seed parameter to recreate exact results or explore variations.
Parameters
| Parameter | Required | Description |
|---|---|---|
| prompt | Yes | Text description of the image you want to generate. |
| width | No | Output width in pixels (default: 1024). |
| height | No | Output height in pixels (default: 1024). |
| strength | No | Generation strength (default: 0.8). |
| num_inference_steps | No | Quality/speed trade-off (default: 28). |
| seed | No | Set for reproducibility; -1 for random. |
| guidance_scale | No | Prompt adherence strength (default: 3.5). |
| output_format | No | Output format: jpeg or png (default: jpeg). |
| enable_base64_output | No | Return base64 string instead of URL (API only). |
| enable_sync_mode | No | Wait for result before returning response (API only). |
How to Use
- Write a prompt describing the image you want. Use the Prompt Enhancer for AI-assisted optimization.
- Set dimensions — adjust width and height for your desired aspect ratio.
- Adjust parameters — fine-tune guidance scale and inference steps as needed.
- Choose output format — select JPEG or PNG.
- Click Run and download your image.
Best Use Cases
- Creative Art & Illustration — Generate unique artwork, concept art, and digital illustrations.
- Marketing & Social Media — Produce eye-catching visuals for campaigns and posts.
- Product Visualization — Create product mockups and lifestyle imagery.
- Design Prototyping — Quickly visualize ideas before committing to full production.
- Personal Projects — Bring any imaginable scene to life for art and experimentation.
Pricing
| Output | Price |
|---|---|
| Per image | $0.025 |
Pro Tips for Best Quality
- Be descriptive in your prompt — include style, mood, lighting, composition, and specific details.
- Use style keywords like “cinematic,” “photorealistic,” “watercolor,” or “digital art” to guide the aesthetic.
- Lower guidance scale (2–4) allows more creativity; higher values (5–7) follow prompts more strictly.
- Fix the seed when iterating to compare the effect of different parameters.
- Start with default inference steps, then increase for finer detail if needed.
Notes
- Processing time varies based on resolution and current queue load.
- Please ensure your prompts comply with content guidelines.
Authentication
For authentication details, please refer to the Authentication Guide.
API Endpoints
Submit Task & Query Result
# Submit the task
curl --location --request POST "https://api.wavespeed.ai/api/v3/wavespeed-ai/flux-srpo" \
--header "Content-Type: application/json" \
--header "Authorization: Bearer ${WAVESPEED_API_KEY}" \
--data-raw '{
"size": "1024*1024",
"strength": 0.8,
"num_inference_steps": 28,
"seed": -1,
"guidance_scale": 3.5,
"output_format": "jpeg",
"enable_base64_output": false,
"enable_sync_mode": false
}'
# Get the result
curl --location --request GET "https://api.wavespeed.ai/api/v3/predictions/${requestId}/result" \
--header "Authorization: Bearer ${WAVESPEED_API_KEY}"
Parameters
Task Submission Parameters
Request Parameters
| Parameter | Type | Required | Default | Range | Description |
|---|---|---|---|---|---|
| prompt | string | Yes | - | The positive prompt for the generation. | |
| size | string | No | 1024*1024 | 256 ~ 1536 per dimension | The size of the generated media in pixels (width*height). |
| strength | number | No | 0.8 | 0.00 ~ 1.00 | Strength indicates extent to transform the reference image. |
| num_inference_steps | integer | No | 28 | 1 ~ 50 | The number of inference steps to perform. |
| seed | integer | No | -1 | -1 ~ 2147483647 | The random seed to use for the generation. -1 means a random seed will be used. |
| guidance_scale | number | No | 3.5 | 1.0 ~ 20.0 | The guidance scale to use for the generation. |
| output_format | string | No | jpeg | jpeg, png | The format of the output image. |
| enable_base64_output | boolean | No | false | - | If enabled, the output will be encoded into a BASE64 string instead of a URL. This property is only available through the API. |
| enable_sync_mode | boolean | No | false | - | If set to true, the function will wait for the result to be generated and uploaded before returning the response. It allows you to get the result directly in the response. This property is only available through the API. |
Response Parameters
| Parameter | Type | Description |
|---|---|---|
| code | integer | HTTP status code (e.g., 200 for success) |
| message | string | Status message (e.g., “success”) |
| data.id | string | Unique identifier for the prediction, Task Id |
| data.model | string | Model ID used for the prediction |
| data.outputs | array | Array of URLs to the generated content (empty when status is not completed) |
| data.urls | object | Object containing related API endpoints |
| data.urls.get | string | URL to retrieve the prediction result |
| data.has_nsfw_contents | array | Array of boolean values indicating NSFW detection for each output |
| data.status | string | Status of the task: created, processing, completed, or failed |
| data.created_at | string | ISO timestamp of when the request was created (e.g., “2023-04-01T12:34:56.789Z”) |
| data.error | string | Error message (empty if no error occurred) |
| data.timings | object | Object containing timing details |
| data.timings.inference | integer | Inference time in milliseconds |
Result Request Parameters
| Parameter | Type | Required | Default | Description |
|---|---|---|---|---|
| id | string | Yes | - | Task ID |
Result Response Parameters
| Parameter | Type | Description |
|---|---|---|
| code | integer | HTTP status code (e.g., 200 for success) |
| message | string | Status message (e.g., “success”) |
| data | object | The prediction data object containing all details |
| data.id | string | Unique identifier for the prediction, the ID of the prediction to get |
| data.model | string | Model ID used for the prediction |
| data.outputs | string | Array of URLs to the generated content (empty when status is not completed). |
| data.urls | object | Object containing related API endpoints |
| data.urls.get | string | URL to retrieve the prediction result |
| data.status | string | Status of the task: created, processing, completed, or failed |
| data.created_at | string | ISO timestamp of when the request was created (e.g., “2023-04-01T12:34:56.789Z”) |
| data.error | string | Error message (empty if no error occurred) |
| data.timings | object | Object containing timing details |
| data.timings.inference | integer | Inference time in milliseconds |