bfl/flux-pro/v1.1-ultra-finetuned
Flux Pro V1.1 Ultra Finetuned is BFL's advanced text-to-image AI model. Create photorealistic images, illustrations, and concept art from natural language descriptions with exceptional detail and prompt adherence.
PNG, JPEG, WebP, or GIF · 20 MiB maximum
Example output — click Run to generate your own
Send your first request
OpenAI-compatible endpoint with unified authentication and usage tracking.
https://api.sandbase.ai/v1/runbfl/flux-pro/v1.1-ultra-finetunedInput Schema
9 parameters · 2 required · 7 optional
| Parameter | Type | Required | Description |
|---|---|---|---|
image | string | Required | The image URL to generate an image from. |
prompt | string | Required | The prompt to generate an image from. |
raw | boolean | Optional | Generate less processed, more natural-looking images. · Default: false |
seed | integer | Optional | The same seed and the same prompt given to the same version of the model will output the same image every time. |
finetune_id | string | Optional | References your specific model |
aspect_ratio | string | Optional | The aspect ratio of the generated image. · Options: 21:9, 16:9, 3:2, 4:3, 5:4, 1:1, 4:5, 3:4, 2:3, 9:16 21:916:93:24:35:41:14:53:42:39:16 |
output_format | string | Optional | The format of the generated image. · Options: jpeg, png · Default: "jpeg" jpegpng |
finetune_strength | number | Optional | Controls finetune influence. Increase this value if your target concept isn't showing up strongly enough. The optimal setting depends on your finetune and prompt · Min: 0 · Max: 2 |
image_prompt_strength | number | Optional | The strength of the image prompt, between 0 and 1. · Min: 0 · Max: 1 · Default: 0.1 |
Output Schema
| Field | Type | Description |
|---|---|---|
id | string | Unique identifier for the generation task |
status | string | Task status: pending, running, completed, failed, timeout |
model | string | Model used for the generation |
outputs | array | Array of output items |
outputs[].url | string | URL of the generated artifact |
outputs[].content_type | string | MIME type (e.g. image/png, video/mp4) |
error | object | null | Error details if failed, null on success |
error.type | string | Machine-readable error type code |
error.message | string | Human-readable error description |
Async Workflow
This model uses asynchronous execution. Submit a request and poll for the result.
- Submit — POST to /v1/run, receive an
id - Poll — GET /v1/run/{id} until status is
completed,failed, ortimeout - Retrieve — Read
outputsfrom the completed response
Code Examples
Ready-to-run snippets
# Step 1: Submit
curl -X POST https://api.sandbase.ai/v1/run \
-H "Content-Type: application/json" \
-H "Authorization: Bearer YOUR_API_KEY" \
-d '{
"model": "bfl/flux-pro/v1.1-ultra-finetuned",
"raw": false,
"prompt": "Extreme close-up of a single tiger eye, direct frontal view. Detailed iris and pupil. Sharp focus on eye texture and color. Natural lighting to capture authentic eye shine and depth. The word \"FLUX\" is painted over it in big, white brush strokes with visible texture.",
"output_format": "jpeg",
"image_prompt_strength": 0.1
}'
# Step 2: Poll result (replace <id>)
curl https://api.sandbase.ai/v1/run/<id> \
-H "Authorization: Bearer YOUR_API_KEY"API README
Flux Pro V1.1 Ultra Finetuned
Flux Pro V1.1 Ultra Finetuned belongs at the high-resolution production shaped by a custom training result stage of a visual workflow. Rather than treating the model as an isolated demonstration, teams can place it inside briefing, review, selection, and handoff practices where the workflow is chosen when a proprietary visual identity and large-format finish must coexist in the same final image. This positioning clarifies why the model earns a place in a real creative pipeline and what kind of decision it helps people make.
A practical use of Flux Pro V1.1 Ultra Finetuned is licensed characters, premium product imagery, signature campaign aesthetics, and specialist domains that need both learned consistency and detailed delivery. Begin by agreeing on the creative objective and review criteria, prepare only the source material needed for that objective, and compare results against audience, brand, editorial, and production needs. Technical request choices remain documented below so the prose can stay focused on planning and creative value.
Highlights
Complex prompt understanding. Connects multiple subjects, relationships, lighting, typography, and style within one composition.
High-fidelity rendering. Resolves people, objects, materials, and environmental detail with a polished finish.
Reliable text integration. Places legible wording into posters, signs, packaging, and graphic layouts.
Broad aesthetic coverage. Handles realistic photography, illustration, design, and stylized imagery without one fixed look. The fine-tuned Ultra configuration targets high-resolution, premium still imagery while injecting domain-specific learned behavior.
Pricing
| Configuration | Billing unit | Price |
|---|---|---|
| Base generation | Per request | $0.07 |
When to Use
| ✅ Good fit | ❌ Consider alternatives |
|---|---|
| The project needs this exact FLUX capability | The intended task belongs to a different media workflow |
| Required source and control media are available | Necessary assets or usage rights are unavailable |
| Creative direction can state change and preservation goals | Output must be deterministic at pixel or frame level |
| Supported dimensions and formats match final delivery | Placement requires unsupported specifications |
| An asynchronous generated result fits production | A live frame-synchronous response is mandatory |
Prompt Guide
Lead with the main subject and action, then specify composition, context, lighting, materials, style, typography, and atmosphere. For editing, identify each source and clearly separate the requested transformation from the subjects, regions, geometry, or identity that must remain unchanged.
{
"finetune_id": "example",
"image": "https://example.com/start-frame.png",
"prompt": "A cinematic, precisely composed result with a clear subject, controlled camera or viewpoint, realistic lighting, exact materials, and intentional atmosphere",
"raw": false,
"seed": 1
}
Technical Specs
| Spec | Value |
|---|---|
| Model ID | bfl/flux-pro/v1.1-ultra-finetuned |
| Input fields | raw (boolean)<br>seed (integer)<br>image (string)<br>prompt (string)<br>finetune_id (string)<br>aspect_ratio (string; 21:9, 16:9, 3:2, 4:3, 5:4, 1:1, 4:5, 3:4, 2:3, 9:16)<br>output_format (string; jpeg, png)<br>finetune_strength (number; 0–2)<br>image_prompt_strength (number; 0–1) |
| Required input | prompt, image |
| Output fields | url, content_type |
| Execution | Asynchronous job |
Related Models
bfl/flux-pro/1.0/erase— Compare this concrete local family route.bfl/flux-pro/1.0/vto— Compare this concrete local family route.bfl/flux-pro/v1.1/redux— Compare this concrete local family route.