Which FLUX.2 model should I choose?

FLUX.2 Model Variants

FLUX.2 offers five model variants, each optimized for different use cases. Choose the right model based on your speed, quality, and cost requirements.

Model Comparison

Model

Best For

Speed

Quality

Multi-Ref Images

[klein]

Real-time apps, high volume

Fastest

High

Up to 4

[max]

Highest quality final assets

Slower

Maximum

Up to 8-10

[pro]

Production at scale

Fast

Very High

Up to 8-10

[flex]

Typography, text in images

Moderate

Very High

Up to 8-10

[dev]

Local development, research

Varies

High

Up to 6

[klein] - Speed Champion

The fastest FLUX model, delivering state-of-the-art quality with fastest inference. Available in two sizes:

4B parameters

- Runs on consumer GPUs (~13GB VRAM), Apache 2.0 license

9B parameters

- Higher quality, requires ~24GB VRAM, FLUX Non-Commercial License

Best for: Real-time applications, interactive tools, high-volume generation

[max] - Quality Champion

Maximum quality and capabilities, including exclusive

grounding search

- the model can perform web searches to incorporate real-time information into generated images.

Best for: Hero images, marketing materials, final production assets

[pro] - Production Workhorse

The optimal balance of quality, speed, and cost for production environments. Designed for high-volume commercial use.

Best for: E-commerce, content platforms, automated pipelines

[flex] - Typography Specialist

Specialized for images containing text. Offers adjustable inference steps and guidance controls for fine-tuned results.

Best for: Posters, advertisements, social media graphics with text

[dev] - Development & Cutomization

Free for non-commercial use. Perfect for prototyping, research, and customization

Best for: Experimentation, customization.

Which Model Should I Use?

Need speed?

→ [klein]

Need maximum quality?

→ [max]

Need balance at scale?

→ [pro]

Need text in images?

→ [flex]

Testing/Customization?

→ [dev]

API Endpoints

/v1/flux-2-klein-4b

/v1/flux-2-klein-9b

/v1/flux-2-max

/v1/flux-2-pro

/v1/flux-2-flex