---
title: "Generate an image with FLUX 1.1 [pro] finetune with ultra mode."
method: POST
path: "/v1/flux-pro-1.1-ultra-finetuned"
tags: ["Models"]
---

# Generate an image with FLUX 1.1 [pro] finetune with ultra mode.

`POST /v1/flux-pro-1.1-ultra-finetuned`

Submits an image generation task with FLUX 1.1 [pro] finetune with ultra mode.

## Request body

- FinetuneFluxUltraInput
  - `finetune_id` string, required — Name of the LoRA to use. For LoRAs from other organizations (public or shared), use the format 'org-id/lora-name'.
  - `finetune_strength` number — Strength of the fine-tuned model. 0.0 means no influence, 1.0 means full influence. Allowed values up to 2.0
  - `prompt` string, nullable — The prompt to use for image generation.
  - `seed` integer, nullable — Optional seed for reproducibility. If not provided, a random seed will be used.
  - `aspect_ratio` string — Aspect ratio of the image between 21:9 and 9:21
  - `safety_tolerance` integer — Tolerance level for input and output moderation. Between 0 and 6, 0 being most strict, 6 being least strict.
  - `output_format` 'jpeg' | 'png' | 'webp'
  - `image_prompt` string, nullable — Optional image to remix in base64 format
  - `image_prompt_strength` number — Blend between the prompt and the image prompt
  - `prompt_upsampling` boolean — Whether to perform upsampling on the prompt. If active, automatically modifies the prompt for more creative generation
  - `webhook_url` string, uri, nullable — URL to receive webhook notifications
  - `webhook_secret` string, nullable — Optional secret for webhook signature verification

## Response `200`

Successful Response

- union
  - AsyncResponse
    - `id` string, required
    - `polling_url` string, required
    - `cost` number, nullable — Cost in credits for this request
    - `input_mp` number, nullable — Input megapixels (2 decimal places)
    - `output_mp` number, nullable — Output megapixels (2 decimal places)
  - AsyncWebhookResponse
    - `id` string, required
    - `status` string, required
    - `webhook_url` string, required
    - `cost` number, nullable — Cost in credits for this request
    - `input_mp` number, nullable — Input megapixels (2 decimal places)
    - `output_mp` number, nullable — Output megapixels (2 decimal places)

## Other responses

- `422` — Validation Error

---

[API](https://skmtc.net/bfl/apis/bfl-api.md) · [All operations](https://skmtc.net/bfl/apis/bfl-api/llms.txt) · [OpenAPI document](https://skmtc-service-staging.skmtc.workers.dev/v1/apis/bfl/bfl-api/revisions/9557482e34b0/schema)