Flux 1.1 Pro Ultra
Playground
Try it on WavespeedAI!FLUX 1.1 Pro Ultra is the latest FLUX model delivering professional-grade photoreal image generation with support up to 2K resolution. Ready-to-use REST inference API, best performance, no coldstarts, affordable pricing.
Features
FLUX1.1 [pro-ultra]
FLUX1.1 [pro-ultra] delivers image generation speeds up to six times faster than the previous FLUX.1 [pro], while also enhancing visual fidelity, prompt accuracy, and output variety.
Enhanced Speed and Workflow
With reduced latency and quicker generation, FLUX1.1 [pro-ultra] streamlines your creative process, striking a strong balance between output quality and performance.
Advanced Capabilities
Codenamed “blueberry” during development, FLUX1.1 [pro-ultra] was evaluated in the Artificial Analysis image arena—one of the leading benchmarks for text-to-image models—and outperformed all competitors, earning the top Elo rating.
The FLUX.1 series utilizes a hybrid design combining multimodal and parallel diffusion transformer modules, scaled to 12 billion parameters. By leveraging flow matching—a straightforward yet powerful approach to generative model training that generalizes diffusion—these models surpass previous diffusion-based methods. Additional improvements include rotary positional embeddings and parallel attention, boosting both model capability and hardware efficiency.
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-1.1-pro-ultra" \
--header "Content-Type: application/json" \
--header "Authorization: Bearer ${WAVESPEED_API_KEY}" \
--data-raw '{
"aspect_ratio": "1:1",
"output_format": "jpg",
"raw": false,
"enable_base64_output": false
}'
# Get the result
curl --location --request GET "https://api.wavespeed.ai/api/v3/predictions/${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. | |
| aspect_ratio | string | No | 1:1 | 1:1, 16:9, 9:16, 4:3, 3:4 | |
| output_format | string | No | jpg | jpg, png | The format of the output image. |
| raw | boolean | No | false | - | Generate less processed, more natural-looking images. |
| seed | integer | No | - | -1 ~ 2147483647 | The random seed to use for the generation. |
| 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. |
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 |