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Complete Guide to Using Flux 2 Flex

Black Forest Labs' creatively flexible text-to-image model spanning photorealism to stylized art.

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Overview

Flux 2 Flex Text-to-Image is the creatively flexible sibling of Flux 2 Pro. While Pro is tuned for strict photorealism, Flex gives more weight to artistic direction — it moves fluidly between photorealistic scenes, illustration, and stylized compositions depending on how you prompt it.

The model shares the family's core strengths: strong composition, believable lighting, and reliable prompt adherence. Where it differs is interpretive range — creative cues like artistic mediums, color treatments, and abstract moods steer the output far more than they would on the Pro variant.

With the same 1K and 2K resolution options and aspect ratio presets as Pro, Flex slots into the identical workflow: explore freely here, and reach for Pro when a final image demands maximum photorealism.

Capabilities

  • Wide stylistic range from photorealism to illustration
  • Strong response to artistic and abstract prompt cues
  • Reliable composition and lighting across styles
  • 1K and 2K resolution output options
  • Same aspect-ratio presets as the Pro variant

Use Cases

1

Artistic and stylized content where strict realism isn't required

2

Moodboards and visual exploration across styles

3

Illustration-leaning marketing and social visuals

4

Concept art with painterly or graphic treatments

5

Creative variations on a theme before a Pro final pass

Input Parameters

Prompt
textarearequired

3–5000 characters.

Lean into creative language — 'dreamy watercolor wash', 'bold flat graphic style', 'moody film noir lighting'. Flex rewards artistic direction that Pro would tone down.

Aspect Ratio
select

1:1 for centered subjects, 16:9 for environmental scenes, 9:16 for vertical content, 3:2/2:3 for classic print ratios.

Options
1:1 Square16:9 Landscape9:16 Portrait4:33:43:22:3
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

Explore on Flex, finalize on Pro
Name an artistic medium
Pair with Flex I2I

Related Models

Flux 2 Flex

Black Forest LabsView Guide →

Flux 2 Pro

Black Forest LabsView Guide →

Z-Image

QwenView Guide →
Quick Info
ProviderBlack Forest Labs
Categoryimage
Available on
text-to-image
Sections
OverviewCapabilitiesUse CasesInput ParametersTips & Best Practices
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