FLUX 2 Flex — AI Detection Benchmark
FLUX 2 Flex by Black Forest Labs is the next-generation FLUX model with enhanced realism, native editing, and flexible inference.
Best & Worst Detectors for FLUX 2 Flex
Highest Detection Rate
Lowest Detection Rate
Benchmark Methodology
FLUX 2 Flex images were tested across 7 AI detectors using a curated dataset of AI-generated and real photographs.
Each detector classifies images as AI-generated or real. We measure the detection rate — the percentage of FLUX 2 Flex images correctly identified as AI-generated. Higher rates mean the detector catches FLUX 2 Flex content more reliably.
See full benchmark methodologyWhat is FLUX 2 Flex?
FLUX 2 Flex is the next-generation image generation model from Black Forest Labs, the creators of the original FLUX series. Building on the success of Flux Pro v1.1, FLUX 2 Flex introduces enhanced realism, crisper text generation, and native editing capabilities within a flexible inference framework.
As the successor to the Flux Pro line, FLUX 2 Flex represents the latest advancement in Black Forest Labs' Rectified Flow Transformer architecture.
Key Features of FLUX 2 Flex
Enhanced Realism
- Improved photorealistic outputs over Flux Pro
- Crisper detail rendering
- Better human anatomy
- Natural lighting improvements
Text Generation
- Crisper text rendering in images
- Improved typography accuracy
- Better multilingual text support
- Cleaner font rendering
Flexible Inference
- Adjustable inference steps (2-50)
- Configurable guidance scale
- Prompt expansion support
- Efficient generation pipeline
Technical Specifications
- Architecture: Rectified Flow Transformer (2nd gen)
- Resolution: Up to 14142x14142 (custom)
- Default inference steps: 28
- Guidance scale: 1.5-10 (default 3.5)
- Output formats: JPEG, PNG
- Access: API via fal.ai
FLUX 2 Watermarking
Black Forest Labs Watermarks
- Invisible watermarks embedded during generation
- Improved over Flux Pro v1.1
- Machine-readable signatures
- Survives common transformations
Detection Characteristics
- 2nd gen Rectified Flow patterns
- Enhanced but similar to Flux Pro signatures
- Model version identifiable
Detecting FLUX 2 Flex Images
Detection Methods
| Method | Accuracy | Notes |
|---|---|---|
| Watermark detection | 85-95% | BFL signatures |
| Statistical analysis | 70-85% | Rectified Flow patterns |
| Version identification | 60-75% | FLUX 2 vs 1 distinction |
Compared to Flux Pro v1.1 Detection
- Similar watermark approach
- Newer architecture creates slightly different patterns
- Some detectors may not distinguish versions
- Combined detection still highly effective
FLUX 2 Flex vs Earlier FLUX Models
| Feature | FLUX 2 Flex | Flux Pro v1.1 | Flux Schnell |
|---|---|---|---|
| Realism | Enhanced | Excellent | Good |
| Text Rendering | Improved | Good | Basic |
| Max Resolution | 14142px | 2048px | 2048px |
| Editing | Native | No | No |
| Speed | Flexible | Medium | Fast |
| Watermarks | Yes | Yes | No (local) |
Our Detection & Removal Service
Detection
Our platform analyzes FLUX 2 Flex images for:
- Black Forest Labs watermark signatures
- 2nd gen Rectified Flow patterns
- Metadata markers
- Generation artifacts
Removal
Our processing handles FLUX 2 Flex content:
- Watermark neutralization
- Statistical pattern disruption
- Metadata cleaning
- Quality preservation
Frequently Asked Questions
Test FLUX 2 Flex Images in the Arena
Upload a FLUX 2 Flex image and see how detectors perform in real time.