What Is FLUX.2 Flex?
FLUX.2 Flex is the tunable member of the FLUX.2 family. Guidance and inference steps are exposed for jobs where prompt adherence and typography need deliberate adjustment instead of a fixed speed-quality preset.
FLUX Model Versions
FLUX.2 Flex
Adjustable steps · 2K
From 4 Credits
FLUX.2 Max
The highest-fidelity FLUX.2 tier for final-publish generation and demanding prompt adherence.
- Resolutions: 1K / 2K
- Reference images: not supported
- Modes: Text to Image, Typography
- Speed: Balanced
FLUX.2 Flex
FLUX.2 with explicit guidance and step controls for typography-heavy final renders.
- Resolutions: 1K / 2K
- Reference images: not supported
- Modes: Text to Image
- Speed: Balanced
FLUX.2 Flash
A low-cost FLUX.2 route for rapid generation and exact multi-reference edits.
- Resolutions: 1K / 2K
- Reference images: up to 4
- Modes: Text to Image, Edit Image, Multi-reference
- Speed: Fastest
FLUX.2 Turbo
A fast FLUX.2 draft model with prompt expansion and unusually low megapixel cost.
- Resolutions: 1K / 2K
- Reference images: up to 4
- Modes: Text to Image, Image to Image, Edit Image, Multi-reference
- Speed: Fastest
FLUX.2 Klein 4B
Black Forest Labs’ fully open compact FLUX.2 model for high-volume and interactive generation.
- Resolutions: 1K / 2K
- Reference images: not supported
- Modes: Text to Image
- Speed: Fastest
FLUX.1 Kontext Max
The premium Kontext tier for typography, prompt adherence and identity-preserving edits.
- Resolutions: 1K
- Reference images: up to 1
- Modes: Text to Image, Image to Image, Edit Image
- Speed: Balanced
FLUX.1 Kontext Pro
Fast, context-aware generation and iterative editing from a single reference.
- Resolutions: 1K
- Reference images: up to 1
- Modes: Text to Image, Image to Image, Edit Image
- Speed: Fast
FLUX1.1 Pro Ultra
The high-resolution FLUX1.1 Pro tier for natural photography, detailed materials and reference-guided renders.
- Resolutions: 2K
- Reference images: up to 1
- Modes: Text to Image, Image to Image
- Speed: Balanced
FLUX1.1 Pro
The production FLUX1.1 endpoint for detailed photographic and material-rich final renders.
- Resolutions: 1K / 2K
- Reference images: not supported
- Modes: Text to Image
- Speed: Balanced
FLUX.1 Dev
The tunable FLUX.1 development checkpoint for prompt experiments, seeded studies and controllable rendering.
- Resolutions: 1K / 2K
- Reference images: not supported
- Modes: Text to Image
- Speed: Slow
FLUX.1 Schnell
The original open FLUX speed tier for rapid four-step concepts and inexpensive prompt batches.
- Resolutions: 1K
- Reference images: not supported
- Modes: Text to Image, Typography
- Speed: Fastest
FLUX.2
Generate photorealistic images and edit reference photos with control over lighting, materials and composition.
- Resolutions: 1K / 2K / 4K
- Reference images: up to 4
- Modes: Text to Image, Image to Image, Edit Image
- Speed: Balanced
FLUX.2 Klein
The distilled FLUX.2: speed first, same visual language.
- Resolutions: 1K
- Reference images: up to 1
- Modes: Text to Image, Image to Image
- Speed: Fastest
What Is FLUX.2 Flex Best For?
- Typography-heavy art
- Controlled prompt adherence
- Material and lighting studies
- Seeded parameter comparisons
How to Use FLUX.2 Flex
- Start at 1K with the defaults.
- Fix the seed before comparing settings.
- Change one control at a time.
- Move only the winning setup to 2K.
FLUX.2 Flex Settings Explained
Guidance
Start at 3.5; raise it only when important prompt details are being ignored.
Steps
28 is the default quality point. Use fewer for drafts and more for difficult text or detail.
The panel above shows only the parameters FLUX.2 Flex actually supports. Switch versions and unsupported controls disappear rather than sitting there doing nothing.
FLUX.2 Flex Prompt Examples
Type and texture
Brushed aluminium sign reading “FLEX”, condensed black lettering, grazing studio light, crisp engraved edges
Material study
Translucent cobalt glass sculpture on rough limestone, hard afternoon sun, realistic caustics, editorial still life
FLUX.2 Flex Test Results
Testing in progress
Every model runs the same eight-category prompt set — portrait, product, poster text, anime character, interior, multi-reference, image editing and character consistency — recording generation time, success rate, text accuracy and identity retention. That run has not finished for FLUX.2 Flex, so this page shows no scores. We do not publish numbers we have not measured.
FLUX.2 Flex Limitations
- Reference editing is not enabled on this route
- 2K costs materially more because billing follows megapixels
- Too much guidance can flatten natural texture
FLUX.2 Flex Pricing and Credits
Credits scale with resolution and image count. The Generate button always shows what this run costs.
1K
4 credits / image
2K
15 credits / image
Failed generations cost 0 credits.
Commercial Use and Image Rights
Commercial use is subject to Black Forest Labs' model and service terms.
- Model used: FLUX.2 Flex
- Model developer: Black Forest Labs
- The inference route is managed internally and may change without changing the selected model
- Uploads are sent only to the configured inference service needed to complete the generation
- You can delete any generation from your history at any time
Frequently Asked Questions
How is Flex different from FLUX.2?+
Flex exposes step and guidance controls; the standard FLUX.2 page is the simpler production default.
Why is editing not shown?+
Reference-image billing varies with every input megapixel, so it stays disabled until the app can meter that cost before charging.
Release History and Sources
November 25, 2025 · Model announced
This date applies to the event shown. Later API access, weights and availability on All Image AI may have different dates.
Explore this event on the image model timeline →
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