How many target variable classes does sentiment analysis models BERT and RoBERTa have?

Hi everyone, so I am a little confused on how many target variable classes does the BERT and RoBERTa models have?



So I understand these 2 models are pre-trained models, which means the number of target variable classes are fixed (if I am not wrong!). For example, the link below for the RoBERTa model in Hugging Face has fixed 3 target variable classes (Negative, Neutral and Positive):



https://huggingface.co/cardiffnlp/twitter-roberta-base-sentiment-latest



But when I googled around and also asked ChatGPT and Bard, they …

analysis bert example languagetechnology pre-trained models roberta sentiment sentiment analysis