Flux 1.1 Pro Ultra

Name: Flux 1.1 Pro Ultra
Brand: Black Forest Labs
SKU: flux-pro-ultra
Price: 0.072 USD
Availability: InStock

BilledgenereringTilgængelig

af Black Forest Labsflux-pro-ultra

FLUX 1.1 Pro in ultra mode. Up to 4 megapixel images with raw mode for photorealism.

Prøv det Få API-nøgle Sammenlign

Pris: 0,072 US$/billede
Billedformat: 1:1, 16:9, 9:16, 3:2, 2:3, 21:9, 9:21
Input → output: Tekst → Billede
Udvikler: Black Forest Labs
Opdateret: 23. september 2026

Playground

Prøv Flux 1.1 Pro Ultra

Input & resultat

0,072 US$/billede

Prompt

Billedformat(valgfrit)

Avancerede indstillinger (2)

Outputformat(valgfrit)

Raw

⌘/Ctrl + Enter

Resultat

Dit billede vises her.

Denne kørsel

0,072 US$ · 7,2 credits

For konti uden tidligere køb: kørsler over 2 credits kræver en opladning.

Ny her?

10 gratis credits (0,10 US$) når du tilmelder dig med Google

Kan bruges 24 timer efter tilmelding, op til 5 kørsler pr. dag og højst 2 credits pr. kørsel. Andre login-metoder starter uden credits.

Examples

Real outputs from the public examples of this model on Replicate, with the prompt and settings that produced them. They were not generated live on this page.

Open full size
Prompt
a majestic snow-capped mountain peak bathed in a warm glow of the setting sun
Settings
aspect_ratio

3:2
Open full size
Prompt
a close up of a miniature model of a small village nestled amidst a lush, verdant landscape, featuring a winding river and a backdrop of trees and buildings.
Settings
aspect_ratio

3:2
Open full size
Prompt
the serene interior of a cave, where a pool of water is nestled amidst an abundance of greenery. Sunlight filters through the cave opening, casting a soft glow on the surrounding foliage and the tranquil water below
Settings
aspect_ratio

3:2

Eksempelprompts

Eksempler fra Railwail-kataloget. De blev ikke genereret live på denne side.

Photorealistic Portrait
A close-up editorial portrait of an elderly fisherman with deep weathered wrinkles, bright blue eyes, wearing a cable-knit sweater, shot on medium format film with shallow depth of field, natural window light
Architecture
A stunning modern cliffside villa with floor-to-ceiling glass walls overlooking the Mediterranean Sea, infinity pool merging with the horizon, golden hour lighting, architectural photography style
Nature Macro
An extreme macro photograph of morning dew drops on a spider web, each droplet acting as a tiny lens refracting the sunrise behind it, bokeh background of wildflowers, National Geographic quality

Om Flux 1.1 Pro Ultra

Kort sagtFra 23. september 2026

Flux 1.1 Pro Ultra er en model af Black Forest Labs i kategorien Billedgenerering. På Railwail koster Flux 1.1 Pro Ultra 0,072 US$ pr. billede. Understøttede billedformater: 1:1, 16:9, 9:16, 3:2, 2:3, 21:9 og 9:21.

Baggrund

Om Black Forest Labs

Grundlagt 2024 · Freiburg, Germany

Black Forest Labs was founded in August 2024 by Robin Rombach, Patrick Esser, Andreas Blattmann and Dominik Lorenz, the team that created Latent Diffusion at LMU Munich and Stable Diffusion at Stability AI. Headquartered in Freiburg, Germany, the lab raised a $31M seed round led by Andreessen Horowitz and has since released the FLUX.1 family and FLUX 1.1 series. FLUX 1.1 [pro] (released October 2024) and the higher-resolution FLUX 1.1 [pro] Ultra (released November 2024) are the flagship commercial tiers, available only through the Black Forest Labs API and partner platforms such as Replicate, fal.ai and Together AI.

Besøg Black Forest Labs

Arkitektur

Rectified-flow Diffusion Transformer (DiT) with native 4 MP rendering

FLUX 1.1 [pro] Ultra is Black Forest Labs' highest-quality commercial image model, released as an API-only tier in November 2024. It builds on the FLUX 1.1 [pro] backbone — a rectified-flow Diffusion Transformer trained with the flow-matching objective from the SD3 paper (Esser et al. 2024) — but is fine-tuned and architecturally extended to produce up to 4 megapixels (2048x2048 or 1568x2520) natively without tiling or super-resolution. Black Forest Labs reports that Ultra achieves these resolutions with the same speed as standard FLUX 1.1 [pro] thanks to architectural and inference optimisations including grouped attention, FP8 inference and improved noise schedules. A complementary 'Raw' mode is exposed that produces less stylised, more photographic outputs. The model uses T5-XXL plus CLIP-L text encoders, the standard 16x latent VAE and 28-50 flow-matching sampling steps.

Parametre: Undisclosed (substantially larger than 12B FLUX.1 backbone)
Kontekst: 512 tokens

Funktioner

Native 4 MP rendering (up to 2048x2048 or 1568x2520)
State-of-the-art photorealism in the FLUX family
'Raw' mode for unstylised photographic look
Strong typography for an image model
Excellent prompt adherence via T5-XXL
Fast inference (~10-20s per 4MP image)
Available via Black Forest Labs API, Replicate, fal.ai, Together AI
Best for: print-quality marketing, large-format ads, editorial photography, premium creative.

Træning og licens

Pretrained on a large licensed image-text corpus; fine-tuned at high resolutions for the Ultra tier. Exact data is not disclosed.

Licens: Proprietary commercial license via Black Forest Labs API and approved partners. Pay-per-image pricing.

Sikkerhedstests: API-level safety filters covering CSAM, NCII, IP-protected characters and named living persons. Outputs may carry watermark metadata.

Kendte begrænsninger

API only, no open weights
Higher per-image cost than dev/schnell tiers
Generation latency higher than 1 MP modes
No fine-tuning for external customers

Forskningsartikler

Priser

Priser i US-dollar. Forbrug debiteres fra forudbetalte credits.

Pr. billede	0,072 US$ pr. billede

1 kredit = 0,01 US$

Omkostningsberegner

Prisberegner

Kørsler

I alt

7,20 US$

720 credits

Pr. kørsel

0,072 US$ · 7,2 credits

Fast pris pr. kørsel, kendt før kørslen starter.

API

Kald Flux 1.1 Pro Ultra med din Railwail API-nøgle. Brug dette model-ID i anmodningen:

flux-pro-ultraAPI-dokumentation Få en API-nøgle

curl https://railwail.com/api/v1/images/generations \
  -H "Authorization: Bearer $RAILWAIL_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{
    "model": "flux-pro-ultra",
    "prompt": "A lighthouse on a rocky coast at sunset, photorealistic"
  }'

import os
from openai import OpenAI

client = OpenAI(
    api_key=os.environ["RAILWAIL_API_KEY"],
    base_url="https://railwail.com/api/v1",
)

image = client.images.generate(
    model="flux-pro-ultra",
    prompt="A lighthouse on a rocky coast at sunset, photorealistic",
)

print(image.data[0].url)

import OpenAI from "openai";

const client = new OpenAI({
  apiKey: process.env.RAILWAIL_API_KEY,
  baseURL: "https://railwail.com/api/v1",
});

const image = await client.images.generate({
  model: "flux-pro-ultra",
  prompt: "A lighthouse on a rocky coast at sunset, photorealistic"
});

console.log(image.data[0].url);

// npm install railwail
import railwail from "railwail";

const rw = railwail(process.env.RAILWAIL_API_KEY);

const res = await rw.image("flux-pro-ultra", "A lighthouse on a rocky coast at sunset, photorealistic");

console.log(res.data[0].url);

Indstil din nøgle som RAILWAIL_API_KEYOpret API-nøgle

Specifikationer

Model-ID: flux-pro-ultra
Udvikler: Black Forest Labs
Kategori: Billedgenerering
Input: Tekst
Output: Billede
Outputformater: JPG, PNG
Billedformat: 1:1, 16:9, 9:16, 3:2, 2:3, 21:9, 9:21
Fakturering: Fastpris, kendt før kørslen
Modelstørrelse: Undisclosed (substantially larger than 12B FLUX.1 backbone)
Licens: Proprietary commercial license via Black Forest Labs API and approved partners. Pay-per-image pricing.
Katalogelement opdateret: 23. september 2026

Inputparametre

Inputs og indstillinger fra modellens inputskema. Eksemplet i API-afsnittet viser, hvilke af dem API'en accepterer.

ParameterTypeStandardTilladte værdier

promptpåkrævet
Type: Tekst
Standard: –
Tilladte værdier: –
raw
Type: Ja/Nej
Standard: false
Tilladte værdier: –
aspect_ratio
Type: Valg
Standard: 3:2
Tilladte værdier: 1:1, 16:9, 9:16, 3:2, 2:3, 21:9 eller 9:21
output_format
Type: Valg
Standard: jpg
Tilladte værdier: jpg eller png

Anvendelsestilfælde

Hvad det bruges til

Print-quality advertising creatives
Editorial and magazine illustration
Premium brand campaigns
Large-format poster and billboard imagery
Hero shots for e-commerce
Stock-photo-grade content

Alle modeller i Billedgenerering

Ofte stillede spørgsmål

Hvad er Flux 1.1 Pro Ultra?

Flux 1.1 Pro Ultra er en model fra Black Forest Labs i kategorien Billedgenerering. På Railwail kan du kalde den med en API-nøgle via Railwail API.

Hvad koster Flux 1.1 Pro Ultra på Railwail?

På Railwail koster Flux 1.1 Pro Ultra 0,072 US$ pr. billede. Prisen kendes før kørslen starter. Forbrug betales fra forudbetalte credits; 1 credit svarer til 0,01 US$.

Hvilke indstillinger understøtter Flux 1.1 Pro Ultra?

Ifølge dens inputskema kender Flux 1.1 Pro Ultra disse parametre: prompt, raw, aspect_ratio (1:1, 16:9, 9:16, 3:2, 2:3, 21:9 eller 9:21) og output_format (jpg eller png).

Hvor hurtig er Flux 1.1 Pro Ultra?

Der er endnu ikke nok målte kørsler af Flux 1.1 Pro Ultra på Railwail til at angive en udførelsestid. Det afhænger af inputtet, indstillingerne og belastningen hos provideren.

Er Flux 1.1 Pro Ultra bedre end FLUX 1.1 Pro?

Det afhænger af opgaven. Flux 1.1 Pro Ultra (Black Forest Labs) og FLUX 1.1 Pro (Black Forest Labs) er begge modeller i kategorien Billedgenerering. Sammenligningssiden viser deres priser og specifikationer side om side.

Sammenlign Flux 1.1 Pro Ultra og FLUX 1.1 Pro

Hvordan bruger jeg Flux 1.1 Pro Ultra via API'en?

Opret en Railwail API-nøgle og send din anmodning med model-ID'en flux-pro-ultra. Kodeeksempler til curl, Python og JavaScript findes i API-sektionen på denne side.

Sammenlignelige modeller

Alle i denne kategori

FLUX 1.1 ProBlack Forest Labs
Black Forest Labs' flagship text-to-image model. Faster generation than FLUX.1 Pro at higher prompt adherence, with strong photorealism and reliable spatial composition. Runs as a hosted Replicate model.
0,048 US$/billede
33 % billigere pr. enhed
Sammenlign Flux 1.1 Pro Ultra og FLUX 1.1 Pro
Flux DevBlack Forest Labs
Black Forest Labs' development model. Fast, high-quality image generation with LoRA support.
0,0384 US$/billede
47 % billigere pr. enhed
Sammenlign Flux 1.1 Pro Ultra og Flux Dev
Google Imagen 4Google DeepMind
Google DeepMind's Imagen 4 text-to-image model, hosted on Replicate. Sharp detail, accurate text rendering, and strong prompt adherence across photographic and illustrated styles. Outputs up to 2K resolution.
0,048 US$/billede
33 % billigere pr. enhed
Sammenlign Flux 1.1 Pro Ultra og Google Imagen 4

Brug Flux 1.1 Pro Ultra via API'en

En API-nøgle til alle modeller på Railwail. Forbrug debiteres fra forudbetalte credits, 1 credit = 0,01 US$.

Få API-nøgle Se alle modeller