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Model infoModelsSnapshot: 15 Oct 2026

Black Forest Labs / FLUX.1

FLUX1.1 [pro] Ultra

Higher-resolution generation with a Raw mode and optional image guidance.

Image generation
availableClosed weightsImage generationImage editing
Official documentation (opens in a new tab)Reviewed 12 Oct 2026
7 of 20 specification fields collected
Output resolutionUp to 4 megapixelsSee specification notes below
Output formatsjpeg, png, webpSee specification notes below
Input billingSee ratesBlack Forest Labs
Output billingSee ratesPublished units and conditions below

Specifications

Provider-documented facts. “Not collected” means we have not verified that field yet, not that the feature is unsupported.

Context / input limit
Not collected
Maximum output
Not collected
Input modalities
Text, ImageSource for Input modalities (opens in a new tab)
Output modalities
ImageSource for Output modalities (opens in a new tab)
Reasoning
Not collected
Tool calling
Not collected
Structured output
Not collected
Streaming
Not collected
Batch processing
Not collected

The pricing guide multiplies cost for multiple images. That does not establish a separate asynchronous Batch API or discounted batch processing.

Fine-tuning
SupportedSource for Fine-tuning (opens in a new tab)

Inference accepts an existing finetune_id and strength. Creation of new training jobs and their current charges are not verified.

Knowledge cutoff
Not collected
Release date
Not collected
Parameters
Not collected
Architecture
Not collected
Languages
Not collected
Context caching
Not collected
Output formats
jpeg, png, webpSource for Output formats (opens in a new tab)
Aspect ratios
21:9 through 9:21Source for Aspect ratios (opens in a new tab)
Output resolutions
Up to 4 megapixelsSource for Output resolutions (opens in a new tab)
Raw generation mode
SupportedSource for Raw generation mode (opens in a new tab)

Raw is a request flag on Ultra, not a separate base model.

Access & pricing

Prices belong to an endpoint and billing tier. A provider listing does not guarantee access for every account or region.

Black Forest Labs

Provider source (opens in a new tab)
API model ID
flux-pro-1.1-ultra

Public route identifier; not a downloadable checkpoint ID.

Access
Public BFL API; account, API key, credits and applicable content policy required.
Regions
Not collected
API endpoint URL
POST /v1/flux-pro-1.1-ultraSource for API endpoint URL (opens in a new tab)

Prices retain their published currencies and billing units below.

Published billing units · original currency · observed 12 Oct 2026
CategoryUsageRateUnit
Image generationOutput1$0.06image

Rate conditions

  1. Published standard per-image rate; no negotiated volume discount assumed.
Pricing source (opens in a new tab)

Data & enterprise terms

Retention, training use, regional processing and enterprise terms have not been summarized for this endpoint.

Black Forest Labs

Provider source (opens in a new tab)
API model ID
flux-pro-1.1-ultra-finetuned

Public route identifier; not a downloadable checkpoint ID.

Access
Public BFL API; account, API key, credits and applicable content policy required.
Regions
Not collected
API endpoint URL
POST /v1/flux-pro-1.1-ultra-finetunedSource for API endpoint URL (opens in a new tab)
Fine-tuning
SupportedSource for Fine-tuning (opens in a new tab)

Inference accepts an existing finetune_id and strength. Creation of new training jobs and their current charges are not verified.

Endpoint pricing has not been collected. Check the provider for applicable rates.

Data & enterprise terms

Retention, training use, regional processing and enterprise terms have not been summarized for this endpoint.

Caching

Caching can reuse earlier input processing. Availability, lifetime and billing depend on the endpoint. A cache hit still generates a new response.

01 / INITIAL INPUTProcess & retain

The system processes eligible input and retains reusable state.

02 / LATER REQUESTCheck available state

Reuse depends on matching input, session state and the cache policy.

03 / CACHE HITReuse & generate

Reusing state can reduce repeated work. Any charges follow the billing rules below.

Black Forest Labs

flux-pro-1.1-ultra
Not verified
How it works
Not collected
Minimum reusable input
Not collected
Lifetime & refresh
Not collected
How to enable it
Not collected
Usage fields
Not collected
Billing rules
Not collected
Limits & data boundaries
Not collected

No verified cache rate for this endpoint. An empty rate is not a zero charge.

Black Forest Labs

flux-pro-1.1-ultra-finetuned
Not verified
How it works
Not collected
Minimum reusable input
Not collected
Lifetime & refresh
Not collected
How to enable it
Not collected
Usage fields
Not collected
Billing rules
Not collected
Limits & data boundaries
Not collected

No verified cache rate for this endpoint. An empty rate is not a zero charge.

What the measurements say

No benchmark observations have been added for this model. We do not turn a vendor description into a performance score.

Latency and throughput depend on the host, request size, reasoning settings and load. There is no measured speed or global usage figure in this record.

The record behind the model

Why it is included

Classification inferred from the release-specific hosted/commercial offering, contrasted with BFL’s separately named public-weight releases and current official weight inventory. Paid access alone is not the criterion. No exact public checkpoint for this included release is present in the reviewed inventory; this is dated evidence, not a perpetual licensing claim.

Classification evidence (opens in a new tab)

Sources reviewed