Image

Flux 1.1 Pro Ultra API

Black Forest Labs' high-resolution mode for Flux 1.1 Pro (Nov 2024), generating images at four times the standard resolution with an optional Raw mode for candid, photographic realism.

Get API key Read the docs

~9s
Avg. generation: 8 credits
From

Flux 1.1 Pro Ultra high-resolution candid close-up of a freckled woman with green eyes in soft window light showing natural skin texture

Playground

Try Flux 1.1 Pro Ultra right here.

model: flux-1.1-pro-ultra

Prompt

Aspect ratio

Image strength

Media inputs

Reference image

Advanced settings

Output format Output quality Raw mode Disable Flux’s built-in prompt enhancement for a more literal result. Seed

Estimated cost 8 credits · $0.08 Generate in Studio

Output

Your output lands here. Hit generate to run this request in Studio.

Pricing

Simple per-generation pricing.

8 credits per generation ≈ $0.08

You only pay for successful generations. Failed jobs are refunded automatically.
One credit balance across every model on Apiframe, no per-model plans.
Start with free credits. No subscription required.
Volume discounts on larger plans.

See plans and credit packs

Specs

At a glance.

Provider Black Forest Labs

Model ID flux-1.1-pro-ultra

Aspect ratios 1:1, 3:4, 4:3, 9:16, 16:9

Image input Supported

Avg. time ~9s

Quickstart

How to call the Flux 1.1 Pro Ultra API.

Send one POST /v2/images/generate request with your API key. The call returns a jobId you can poll, or pass a webhook_url and the result is pushed to you the moment it's ready.

Swap flux-1.1-pro-ultra for any other model and nothing else changes.

Get API key Read the docs

generate.js

const response = await fetch("https://api.apiframe.ai/v2/images/generate", {
  method: "POST",
  headers: {
    "X-API-Key": "afk_your_api_key_here",
    "Content-Type": "application/json",
  },
  body: JSON.stringify({
    "prompt": "a sleek silver sports car on a coastal highway at sunset, hyper-realistic",
    "model": "flux-1.1-pro-ultra",
    "fluxParams": {
      "image_prompt": "https://example.com/input.jpg",
      "image_prompt_strength": 0.5,
      "output_format": "jpg",
      "output_quality": 90
    }
  }),
});
const { jobId } = await response.json();
console.log(jobId);

import requests

response = requests.post(
    "https://api.apiframe.ai/v2/images/generate",
    headers={
        "X-API-Key": "afk_your_api_key_here",
        "Content-Type": "application/json",
    },
    json={
        "prompt": "a sleek silver sports car on a coastal highway at sunset, hyper-realistic",
        "model": "flux-1.1-pro-ultra",
        "fluxParams": {
            "image_prompt": "https://example.com/input.jpg",
            "image_prompt_strength": 0.5,
            "output_format": "jpg",
            "output_quality": 90
        }
    },
)
print(response.json())  # { "jobId": "...", "status": "QUEUED" }

curl -X POST https://api.apiframe.ai/v2/images/generate \
  -H "X-API-Key: afk_your_api_key_here" \
  -H "Content-Type: application/json" \
  -d '{
        "prompt": "a sleek silver sports car on a coastal highway at sunset, hyper-realistic",
        "model": "flux-1.1-pro-ultra",
        "fluxParams": {
            "image_prompt": "https://example.com/input.jpg",
            "image_prompt_strength": 0.5,
            "output_format": "jpg",
            "output_quality": 90
        }
    }'

let job;
do {
  await new Promise((r) => setTimeout(r, 2000));
  job = await fetch("https://api.apiframe.ai/v2/jobs/JOB_ID", {
    headers: { "X-API-Key": "afk_your_api_key_here" },
  }).then((r) => r.json());
} while (job.status !== "COMPLETED" && job.status !== "FAILED");
console.log(job.result);

import requests, time

while True:
    job = requests.get(
        "https://api.apiframe.ai/v2/jobs/JOB_ID",
        headers={"X-API-Key": "afk_your_api_key_here"},
    ).json()
    if job["status"] in ("COMPLETED", "FAILED"):
        break
    time.sleep(2)
print(job["result"])

curl https://api.apiframe.ai/v2/jobs/JOB_ID \
  -H "X-API-Key: afk_your_api_key_here"

Input schema

Every field Flux 1.1 Pro Ultra accepts, with types and defaults. The full reference lives in the docs.

Field	Type	Description
prompt required	string	Text description of what to generate.
model required	string	The model identifier for this endpoint. Default:"flux-1.1-pro-ultra" · "flux-1.1-pro-ultra"
fluxParams.image_prompt	string (URL)	Reference image (URL)
fluxParams.image_prompt_strength	number	How closely to follow the reference image (0–1). Default:0.5 · min 0, max 1, step 0.05
fluxParams.output_format	string	Output format Default:"jpg" · "jpg", "png", "webp"
fluxParams.output_quality	number	Output quality Default:90 · min 0, max 100, step 1
fluxParams.raw	boolean	Disable Flux’s built-in prompt enhancement for a more literal result. Default:false
fluxParams.seed	number	Reuse a number to reproduce the same result. step 1

The Flux flagship

Flux 1.1 Pro Ultra is one of 7 Flux image models on Apiframe. The full editorial page (showcase, comparison, and use cases) lives on the flagship.

Flagship from 7 cr Flux 2 Max

The quality ceiling of the Flux family.

Explore Flux 2 Max All image models

Flux 1.1 Pro Ultra questions

What teams ask before shipping with Flux 1.1 Pro Ultra. Everything else lives in the docs.

How is it different from standard Flux 1.1 Pro?

Mainly resolution and price. Ultra generates at four times the resolution (up to 4MP) and is priced at 8 credits ($0.08) per image on Apiframe, versus 5 credits ($0.05) for the standard model.

What resolution does it produce?

Up to 4MP, which is 2048x2048, four times higher than standard models.

What is Raw mode?

An optional setting for a less synthetic, more natural, candid-photography look.

How fast is it?

About 10 seconds per image, roughly 2.5 times faster than most other high-resolution AI models.

What does it cost?

On Apiframe, 8 credits ($0.08) per image.

Where can you access it?

Through Apiframe, as well as the BFL API and partners like Black Forest Labs' own platform and the usual integration partners.