# FLUX1.1 [pro] Ultra

FLUX1.1 [pro] Ultra is Black Forest Labs's maximum-resolution tier of FLUX 1.1 Pro, extending the model with raw image format output and higher resolution support for workflows that need the largest output dimensions and full tonal headroom.

- **Model ID:** `bfl/flux-pro-1.1-ultra`
- **Type:** image
- **Providers:** bfl
- **Context window:** Not applicable
- **Maximum output tokens:** 0
- **Pricing:** $0.06/image
- **Canonical page:** https://vercel.com/ai-gateway/models/flux-pro-1.1-ultra

## Supported parameters

- **Parameters:** `aspectRatio`
- **Operations:** `text-to-image`, `image-to-image`
- **Input modalities:** `text`, `image`
- **Output modalities:** `image`
- **Aspect ratios:** `21:9`, `16:9`, `4:3`, `3:2`, `1:1`, `2:3`, `3:4`, `9:16`, `9:21`
- **Resolutions:** Not reported
- **Durations:** Not reported
- **Frame rates:** Not reported
- **Maximum outputs per request:** Not reported
- **Maximum input images:** Not reported
- **Input image formats:** Not reported
- **Maximum input image size:** Not reported

## Example

```ts
import { experimental_generateImage as generateImage } from 'ai';

const result = await generateImage({
  model: 'bfl/flux-pro-1.1-ultra',
  prompt: 'A red balloon on a wooden table.'
});
```

## About

FLUX1.1 [pro] Ultra is the highest tier of the FLUX 1.1 Pro model, available through AI Gateway since November 1, 2024 as part of the image-only model expansion. The "Ultra" designation adds raw image format support and expanded resolution capabilities beyond standard FLUX 1.1 Pro. Choose it when output quality and resolution are the primary constraints rather than generation speed or cost.

Raw image output is a meaningful differentiator for professional and post-production workflows. Unlike compressed formats such as JPEG or WebP, raw files preserve the full tonal range without lossy compression artifacts. That gives retouchers, photographers, and design teams more latitude for color grading, exposure adjustment, and compositing.

Within the FLUX family on AI Gateway, Ultra occupies the resolution and format quality ceiling of the FLUX.1 generation. If you need the highest quality from the FLUX.1 lineage (print collateral, large-format advertising, billboard assets, high-resolution stock imagery), Ultra provides the output dimensions and file format support that standard FLUX 1.1 Pro doesn't.

## What to consider

FLUX1.1 [pro] Ultra's raw image format output is particularly valuable for post-production pipelines where generated images will be retouched, color-graded, or composited. Raw files retain more tonal information than compressed formats.

## When to use

### Best For

- Print and large-format output workflows where maximum image resolution is required, advertising materials, billboards, posters, and print publications that need high pixel density
- Post-production pipelines where generated images will be retouched or composited, raw format output retains full tonal information for professional color grading
- High-resolution stock image generation where output quality and fine photorealistic detail are the primary commercial requirement
- Applications where the visual quality ceiling of the FLUX.1 generation is needed and the additional per-image cost of the Ultra tier is justified by the use case

### Consider Alternatives When

- Standard resolution output is sufficient and cost efficiency is a priority. FLUX 1.1 Pro delivers the same model at lower cost per image
- Multi-reference input, 4 MP FLUX.2-generation editing, or the improved world knowledge architecture of FLUX.2 Pro or FLUX.2 Max are required
- Real-time or interactive generation speed is the priority. Ultra's higher-quality generation isn't optimized for sub-second throughput

## Best for

- **Print and large-format output:** Advertising materials, billboards, posters, and print publications that need maximum image resolution and high pixel density
- **Post-production pipelines:** Raw format output retains full tonal information for professional retouching, color grading, or compositing
- **High-resolution stock imagery:** Commercial generation where output quality and fine photorealistic detail are the primary requirement
- **FLUX.1 quality ceiling:** Applications that justify the additional per-image cost for the highest visual quality in the FLUX.1 generation

## Consider alternatives

- **Cost efficiency:** FLUX 1.1 Pro delivers the same model at lower cost per image when standard resolution output is sufficient
- **FLUX.2 architecture features:** FLUX.2 Pro or FLUX.2 Max provide multi-reference input, 4 MP editing, and improved world knowledge architecture
- **Real-time generation speed:** Ultra's higher-quality generation isn't optimized for sub-second interactive throughput

## Frequently asked questions

### What does FLUX1.1 [pro] Ultra cost per image?

This page lists the current rates. Multiple providers can serve FLUX1.1 [pro] Ultra, so AI Gateway surfaces live pricing rather than a single fixed figure.

### What does "Ultra" add over standard FLUX 1.1 Pro?

Raw image format output and expanded resolution capabilities. Standard FLUX 1.1 Pro produces compressed image outputs. Ultra retains more tonal information through raw format support and supports higher output dimensions.

### What is raw image format output and why does it matter?

Raw image files preserve the full tonal range of generated content without lossy compression artifacts. For post-production workflows involving retouching, color grading, or compositing, raw files give creative teams significantly more latitude than compressed formats like JPEG.

### When should I use Ultra instead of FLUX.2 Max for high-quality generation?

FLUX.2 Max is part of the FLUX.2 generation with multi-reference input, 4 MP resolution, and improved world knowledge architecture. Ultra is the FLUX.1 generation's highest quality tier. If your workflow specifically benefits from raw format output in the FLUX.1 lineage, Ultra is appropriate. If you need multi-reference and world knowledge capabilities, FLUX.2 Max is more suitable.

### Is FLUX1.1 [pro] Ultra slower than standard FLUX 1.1 Pro?

Higher-resolution generation generally requires more compute per image. Ultra prioritizes maximum quality and resolution over generation speed, so it isn't the right choice for latency-sensitive or real-time workflows.

### Does FLUX1.1 [pro] Ultra support image editing in addition to text-to-image generation?

FLUX1.1 [pro] Ultra is a text-to-image model. For editing existing images, the Kontext models (Pro, Max) and Fill Pro are purpose-built for editing and inpainting workflows respectively.

### Is FLUX1.1 [pro] Ultra a multimodal LLM?

No. FLUX1.1 [pro] Ultra is a dedicated image generation model with no conversational context or chat interface. Use `generateImage` from the AI SDK to send requests.

## Links

- [Model page](https://vercel.com/ai-gateway/models/flux-pro-1.1-ultra)
- [AI Gateway documentation](https://vercel.com/docs/ai-gateway)
- [Provider model documentation](https://bfl.ai/models/flux-kontext)
- [Provider pricing](https://bfl.ai/pricing)