What is FLUX by Black Forest Labs?

FLUX is a family of image-generation and editing models available through hosted APIs and downloadable weights. This guide focuses on the FLUX.2 image family.

Which FLUX.2 model should I choose?

Consider pro for balanced production work, max for premium output and grounding search, flex for sampling controls, klein for compact low-latency workflows, and dev for local customization.

Does klein generate images in half a second on every GPU?

No. BFL's advertised speed measurements depend on specific hardware and settings. Consumer-GPU compatibility does not guarantee the same latency.

Are all FLUX open-weight models Apache 2.0?

No. Klein 4B and 4B Base use Apache 2.0, while klein 9B variants and FLUX.2 dev use the FLUX Non-Commercial License.

Can FLUX.2 dev outputs be used commercially?

Its model card permits commercial use of generated outputs as described by the license. Commercial deployment of the model is a separate question and must be reviewed under the applicable terms.

Do reference images affect FLUX API cost?

Yes. Reference inputs are billed in addition to output resolution. For pro, a one-MP output with two one-MP references totals $0.06 at the rates checked October 8, 2026.

Can FLUX edit existing images?

Yes. FLUX.2 supports generation and image editing with references. Reference limits differ by model and access route, so check the endpoint documentation.

Is running FLUX locally free?

Some weights can be downloaded without a model purchase, subject to their license. Local generation still requires suitable hardware and has operating costs.

AI / Image Generation / Black Forest Labs

FLUX — Black Forest Labs

FLUX image generation and editing family from Black Forest Labs, spanning FLUX 3 Image, FLUX.2 and specialized FLUX image tools.

Image Generation & EditingCompare this model Visit website

Starting Price

API from $0.014/image (FLUX.2 klein 4B) · FLUX 3 Image list price from $0.041 at 768×768

Maximum Resolution

FLUX 3 Image: up to 4K (~16 MP tier) · FLUX.2: up to 4 MP (e.g. 2048×2048)

Image Editing

Unified image editing in FLUX.2 · FLUX 3 Image supports image-to-image · specialized FLUX editing tools

Best For

Developers / Creative production / Marketing / Product visualization / E-commerce / Design

About FLUX — Black Forest Labs

Black Forest Labs FLUX family covers high-quality text-to-image and image-to-image generation, multi-reference editing, typography, photorealism, pose/composition controls, open weights, fine-tuning and production APIs.

Specifications

Pricing

3 specifications

Starting Price	API from $0.014/image (FLUX.2 klein 4B) · FLUX 3 Image list price from $0.041 at 768×768
Free Plan	No general free hosted API tier · FLUX.2 dev is free for non-commercial local development · FLUX.2 klein 4B open weights use Apache 2.0
Usage Limits / Credits	Pay-as-you-go · 1 credit = $0.01 · FLUX.2 priced by megapixel/model · FLUX 3 Image priced by resolution tier

Overview

3 specifications

Primary Use Case	Professional image generation & image editing
Best For	Developers / Creative production / Marketing / Product visualization / E-commerce / Design
Platforms	BFL Playground · API · local/open-weight deployment for selected models

Image Generation

6 specifications

Text-to-Image	FLUX 3 Image + FLUX.2 unified text-to-image generation
Image-to-Image	FLUX 3 Image image-to-image · FLUX.2 multi-reference generation/editing
Maximum Resolution	FLUX 3 Image: up to 4K (~16 MP tier) · FLUX.2: up to 4 MP (e.g. 2048×2048)
Aspect Ratios	Multiple supported aspect ratios by model/resolution tier · output dimensions rounded to model requirements

Image Editing	Unified image editing in FLUX.2 · FLUX 3 Image supports image-to-image · specialized FLUX editing tools
Inpainting	FLUX.1 Fill pro for masked inpainting / generative fill
Outpainting	FLUX Outpainting tool · megapixel-based pricing
Object Removal	FLUX Eraser dedicated removal tool
Background Removal	No dedicated BFL background-removal endpoint documented as a core FLUX image tool
Background Replacement	Prompt/image editing workflows can replace scene/background content
Generative Fill	FLUX.1 Fill pro · masked content generation and replacement
Upscaling	Image-specific standalone upscaler not listed as a core BFL image endpoint; higher-resolution generation available up to FLUX 3 Image 4K

Reference Images	FLUX.2: up to 8 refs via API / 10 in Playground on pro/max; klein up to 4; dev up to 6
Style Control	Multi-reference style guidance · precise color/hex control · FLUX.2 flex offers fine-grained guidance/steps
Character Consistency	FLUX.2 multi-reference identity/character consistency · up to 8–10 references on pro/max
Style Reference	Multi-reference editing supports style and visual-reference guidance
Pose / Composition Control	FLUX.2 JSON control system · pose guidance · generative expand/shrink
Seed Control	Seed parameter available on supported FLUX API generation endpoints

Photorealism	Excellent · FLUX.2 emphasizes high-detail photorealism and spatial/lighting realism
Text Rendering	Excellent · FLUX.2 flex specializes in typography; FLUX.2 family improves reliable text rendering
Typography / Logo Generation	Strong typography, infographics, UI mockups and design asset generation; raster output
Vector Generation	No native SVG/vector output documented for core FLUX image models
Transparent Background	No dedicated transparent-background output documented across core FLUX generation family

Available Models	FLUX 3 Image · FLUX.2 max/pro/flex/klein/dev · FLUX.1 Kontext · FLUX1.1 · Fill/Eraser/Outpainting tools
Model Selection	Choose model/variant by quality, speed, typography, cost, editing or local-deployment needs
Custom Models	Open-weight FLUX.2 models can be customized under applicable licenses
Model Training	Fine-tuning & LoRA rights included with BFL open-weight commercial licensing tiers

API Access	Black Forest Labs API · pay-as-you-go image generation/editing endpoints
Integrations	BFL Playground · REST API · open-weight/local deployment via supported distributions
Automation Support	REST API · batch generation · production deployment options

FLUX — Black Forest Labs

About FLUX — Black Forest Labs

Specifications

Pricing

Overview

Image Generation

Image Editing

Control & Consistency

Quality & Design

Models & Customization

Developer & Integration

Commercial & Business

Compare FLUX — Black Forest Labs

Compare before you choose

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Reviews & Guides

FLUX by Black Forest Labs: Models, Pricing & Guide (2026)

Commercial Use	BFL API includes commercial rights; open-weight commercial use depends on model license/tier
Team Plan	No seat-based hosted subscription · open-weight Builder/Platform/Professional licenses include 10 licensed users
Enterprise Plan	Enterprise: all models/new releases · custom volume/domains/users · permissive commercial use · API + weights pricing