This model was trained without weighted sampling, and the dataset contains 81.9% 'Likely' and 18.1% 'Unlikely' examples. The same model trained with weighted sampling preformed worse on training eval metrics, but better when evaluated by gpt-4o-mini as a judge and is available here.

Metics

Evaluated on a 0.1 random sample of the NMB+ dataset, unseen during training

Accuracy: 0.7884
Precision: 0.8573
Recall: 0.8599
F1 Score: 0.8586

How to Use:

Keep in mind, this model was trained on full 512 token chunks (tends to over-predict Unlikely for standalone sentences). If you're planning on processing stand alone sentences, you may find better results with this NMB+ model, which was trained on biased headlines.

from transformers import pipeline

classifier = pipeline("text-classification", model="maximuspowers/nmbp-bert-full-articles")
result = classifier("He was a terrible politician.", top_k=2)

Example Response:

[
  {
    'label': 'Likely',
    'score': 0.9967995882034302
  },
  {
    'label': 'Unlikely',
    'score': 0.003200419945642352
  }
]