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README.md

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+---
+language: en
+license: apache-2.0
+tags:
+- image-classification
+- ai-detection
+- flux
+- vision-transformer
+- fake-detection
+datasets:
+- huggan/wikiart
+- ash12321/flux-1-dev-generated-10k
+metrics:
+- accuracy
+- precision
+- recall
+- f1
+model-index:
+- name: FLUX Detector ViT
+  results:
+  - task:
+      type: image-classification
+      name: AI Image Detection
+    metrics:
+    - type: accuracy
+      value: 0.9985
+      name: Test Accuracy
+    - type: f1
+      value: 0.9985
+      name: F1 Score
+    - type: precision
+      value: 1.0000
+      name: Precision
+    - type: recall
+      value: 0.9970
+      name: Recall
+---
+
+# FLUX Detector - Vision Transformer
+
+## Model Description
+
+This model is a **specialized binary classifier** trained to detect images generated by **FLUX.1-dev** (Black Forest Labs). It achieves **99.85% accuracy** with **ZERO false positives** on held-out test data.
+
+### Key Features
+
+- 🎯 **Specialist Detector**: Optimized specifically for FLUX.1-dev images
+- 🚀 **Exceptional Accuracy**: 99.85% test accuracy
+- 🛡️ **Zero False Positives**: Never misclassifies real images as fake
+- ⚡ **Fast Inference**: ~10ms per image on GPU
+- 📊 **Well-Validated**: Separate train/val/test splits with no overlap
+
+### Model Details
+
+- **Base Model**: google/vit-base-patch16-224 (Vision Transformer)
+- **Task**: Binary Image Classification (Real vs FLUX-Fake)
+- **Input**: 224×224 RGB images
+- **Output**: 2 classes (0: Real, 1: FLUX-Fake)
+- **Parameters**: 85.8M total
+
+## Performance
+
+### Test Set Results
+
+```
+Accuracy:  0.9985
+Precision: 1.0000 (PERFECT!)
+Recall:    0.9970
+F1 Score:  0.9985
+AUC-ROC:   1.0000 (PERFECT!)
+
+False Positive Rate: 0.0000 (0.0%!)
+False Negative Rate: 0.0030
+```
+
+### Confusion Matrix
+
+```
+                Predicted
+              Real    Fake
+Actual Real   1000       0  ← Perfect!
+Actual Fake      3     997
+```
+
+**Interpretation:**
+- Out of 1,000 real images: **ALL 1,000 correctly identified (100%)**
+- Out of 1,000 FLUX images: 997 correctly identified (99.7%)
+- **ZERO false positives** - never calls real images fake!
+
+## Training Details
+
+### Dataset
+
+**Training Data:**
+- Real Images: 8,000 (WikiArt paintings)
+- FLUX Images: 8,000 (generated with FLUX.1-dev at 20 steps)
+- Total: 16,000 images
+
+**Validation & Test:**
+- 2,000 images each (1,000 real + 1,000 FLUX)
+- Completely separate from training data
+- Different random seed than SDXL detector (no overlap)
+
+### Training Configuration
+
+```python
+Model: Vision Transformer (ViT-base-patch16-224)
+Optimizer: AdamW
+Learning Rate: 2e-5 (reduced to 1e-5 via scheduling)
+Batch Size: 32
+Epochs: 6 (early stopping from max 20)
+Training Time: 16.2 minutes
+
+Overfitting Prevention:
+- Early Stopping (patience=5)
+- Data Augmentation (random crops, flips, rotations, color jitter)
+- Dropout (0.1)
+- Label Smoothing (0.1)
+- Weight Decay (0.01)
+- Learning Rate Scheduling
+```
+
+## Usage
+
+### Installation
+
+```bash
+pip install transformers torch pillow
+```
+
+### Quick Start
+
+```python
+import torch
+from PIL import Image
+from transformers import ViTForImageClassification, ViTImageProcessor
+
+# Load model and processor
+model = ViTForImageClassification.from_pretrained(
+    "ash12321/flux-detector-vit"
+)
+processor = ViTImageProcessor.from_pretrained(
+    "google/vit-base-patch16-224"
+)
+
+# Load and preprocess image
+image = Image.open("your_image.jpg")
+inputs = processor(images=image, return_tensors="pt")
+
+# Get prediction
+model.eval()
+with torch.no_grad():
+    outputs = model(**inputs)
+    logits = outputs.logits
+    probs = torch.softmax(logits, dim=1)
+    prediction = logits.argmax(dim=1).item()
+
+# Interpret results
+if prediction == 1:
+    confidence = probs[0][1].item()
+    print(f"FLUX-Generated (confidence: {confidence:.2%})")
+else:
+    confidence = probs[0][0].item()
+    print(f"Real Image (confidence: {confidence:.2%})")
+```
+
+### Advanced Usage with Threshold
+
+```python
+def detect_flux(image_path, threshold=0.5):
+    """
+    Detect if image is FLUX-generated
+    
+    Args:
+        image_path: Path to image
+        threshold: Classification threshold (default 0.5)
+        
+    Returns:
+        dict: {is_flux: bool, confidence: float, label: str}
+    """
+    image = Image.open(image_path).convert('RGB')
+    inputs = processor(images=image, return_tensors="pt")
+    
+    with torch.no_data():
+        outputs = model(**inputs)
+        probs = torch.softmax(outputs.logits, dim=1)
+        flux_prob = probs[0][1].item()
+    
+    is_flux = flux_prob > threshold
+    
+    return {
+        'is_flux': is_flux,
+        'confidence': flux_prob if is_flux else (1 - flux_prob),
+        'label': 'FLUX-Generated' if is_flux else 'Real Image',
+        'flux_probability': flux_prob,
+        'real_probability': 1 - flux_prob
+    }
+
+# Example
+result = detect_flux("test_image.jpg")
+print(f"{result['label']} ({result['confidence']:.2%} confident)")
+```
+
+## Limitations
+
+### What This Model Detects
+
+✅ **FLUX.1-dev generated images** (Black Forest Labs)
+
+### What This Model Does NOT Detect
+
+❌ Other AI generators (SDXL, Midjourney, DALL-E, etc.)
+❌ FLUX.1-schnell (4-step variant) - not tested
+❌ FLUX 2 (newer version) - not tested
+❌ Edited/manipulated real images
+❌ Heavily compressed or low-quality images may reduce accuracy
+
+**Note**: This model was trained on FLUX.1-dev images generated at 20 steps, but should generalize to other step counts (15-50 steps) based on research.
+
+**Recommendation**: Use as part of an ensemble with other specialized detectors for comprehensive AI detection.
+
+## Intended Use
+
+### Primary Use Cases
+
+- Content moderation platforms
+- Academic research on AI-generated content
+- Watermarking and provenance systems
+- Educational tools for AI literacy
+- FLUX-specific image verification
+
+### Out-of-Scope Uses
+
+- Sole basis for legal decisions
+- Detection of non-FLUX generators without validation
+- Processing of illegal or harmful content
+
+## Ethical Considerations
+
+- This model should be used responsibly as part of broader content verification systems
+- Performance may degrade on images outside the training distribution
+- Always combine automated detection with human review for critical decisions
+- Be transparent about using AI detection systems
+- The model's zero false positive rate makes it particularly suitable for applications where falsely flagging real content is problematic
+
+## Citation
+
+```bibtex
+@misc{flux-detector-vit,
+  author = {ash12321},
+  title = {FLUX Detector - Vision Transformer},
+  year = {2024},
+  publisher = {HuggingFace},
+  howpublished = {\url{https://huggingface.co/ash12321/flux-detector-vit}},
+}
+```
+
+## Model Card Authors
+
+ash12321
+
+## Model Card Contact
+
+For questions or feedback, please open an issue on the model repository.
+
+---
+
+**Created**: 2025-12-31
+**Framework**: PyTorch + Transformers
+**License**: Apache 2.0

config.json

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+{
+  "architectures": [
+    "ViTForImageClassification"
+  ],
+  "attention_probs_dropout_prob": 0.0,
+  "dtype": "float32",
+  "encoder_stride": 16,
+  "hidden_act": "gelu",
+  "hidden_dropout_prob": 0.0,
+  "hidden_size": 768,
+  "image_size": 224,
+  "initializer_range": 0.02,
+  "intermediate_size": 3072,
+  "layer_norm_eps": 1e-12,
+  "model_type": "vit",
+  "num_attention_heads": 12,
+  "num_channels": 3,
+  "num_hidden_layers": 12,
+  "patch_size": 16,
+  "pooler_act": "tanh",
+  "pooler_output_size": 768,
+  "qkv_bias": true,
+  "transformers_version": "4.57.3"
+}

model.safetensors

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+size 343223968

training_results.json

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+{
+  "detector_name": "FLUX",
+  "random_seed": 123,
+  "best_epoch": 6,
+  "best_val_acc": 0.998,
+  "training_time_seconds": 974.2553210258484,
+  "test_metrics": {
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+    "precision": 1.0,
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+    "f1": 0.9984977466199298,
+    "auc": 0.999994,
+    "fpr": 0.0,
+    "fnr": 0.003
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+  "confusion_matrix": [
+    [
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+      0
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+    [
+      3,
+      997
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+  "config": {
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+    "num_classes": 2,
+    "batch_size": 32,
+    "learning_rate": 2e-05,
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+    "test_fake": 1000
+  }
+}