Yelp 5-class Star Rating Classifier (RoBERTa-base)

Fine-tuned roberta-base for predicting Yelp star ratings (1–5) from review text. Trained on 50k sampled Yelp reviews.

Validation accuracy: 0.6856 · Macro-F1: 0.6849

Used by the Yelp Business Intelligence Agent for the optional classify_review tool.