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Black Forest Labsimage

Complete Guide to Using Flux 2 Flex

Flexible multi-image transformation with creative composition from Black Forest Labs.

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Overview

Flux 2 Flex Image-to-Image is the more creatively flexible sibling of Flux 2 Pro I2I. While the Pro variant prioritizes strict photorealism, Flex allows for broader creative interpretation, producing outputs that can range from photorealistic to artistically stylized.

Like the Pro variant, Flex accepts a primary image and an optional second reference. The key difference is in how it interprets your prompt -- Flex gives more weight to creative direction and style cues, making it better suited for artistic transformations, stylization, and experimental compositions.

At 70 credits per generation, Flex offers a more affordable entry point than the Pro variant while maintaining high quality. It is particularly well-suited for creative projects, artistic exploration, and any workflow where strict photorealism is less important than visual impact.

Capabilities

  • Flexible multi-image transformation with creative range
  • Broader stylistic interpretation compared to Pro variant
  • Primary and secondary image input support
  • Strong handling of both realistic and artistic styles
  • Multiple aspect ratio and resolution options

Use Cases

1

Artistic image transformation and stylization

2

Creative compositing from multiple reference images

3

Visual exploration and mood board creation

4

Social media content with artistic treatments

5

Brand asset stylization and creative variations

Input Parameters

Prompt
textarearequired

3–5000 characters.

Describe the creative direction freely. Flex responds well to artistic cues: 'reimagine as a dreamy watercolor', 'transform into a moody film noir scene', 'blend both images into a surreal composition'.

Source Images
filerequired

1–8 source images (JPEG/PNG/WebP, ≤10MB each).

Aspect Ratio
select

Select the output ratio. Flex handles re-framing gracefully, so feel free to change ratios for creative re-compositions.

Options
1:14:33:416:99:163:22:3Auto
Default: 1:1
Resolution
select

1K for fast creative exploration. 2K for detailed final output.

Options
1K2K
Default: 1K
NSFW Filter
toggle

Enable NSFW content filtering.

Default: false

Tips & Best Practices

Lean into creative prompts
Use Flex for exploration, Pro for final
Combine contrasting images

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