app.py

import gradio as gr
from transformers import AutoTokenizer, AutoModelForSequenceClassification
import numpy as np
from utils import model_predict


roberta_base_detector = AutoModelForSequenceClassification.from_pretrained("Models/fine_tuned/roberta-base-openai-detector-model")
roberta_base_detector_tknz = AutoTokenizer.from_pretrained("Models/fine_tuned/roberta-base-openai-detector-tokenizer")

chatgpt_lli_hc3_detector = AutoModelForSequenceClassification.from_pretrained("Models/fine_tuned/chatgpt-detector-lli-hc3-model")
chatgpt_lli_hc3_detector_tknz = AutoTokenizer.from_pretrained("Models/fine_tuned/chatgpt-detector-lli-hc3-tokenizer")

chatgpt_roberta_detector = AutoModelForSequenceClassification.from_pretrained("Models/fine_tuned/chatgpt-detector-roberta-model")
chatgpt_roberta_detector_tknz = AutoTokenizer.from_pretrained("Models/fine_tuned/chatgpt-detector-roberta-tokenizer")


def classify_text(text):
    # Get predictions from each model
    roberta_base_pred = model_predict(roberta_base_detector, roberta_base_detector_tknz, text)
    chatgpt_lli_hc3_pred = model_predict(chatgpt_lli_hc3_detector, chatgpt_lli_hc3_detector_tknz, text)
    chatgpt_roberta_pred = model_predict(chatgpt_roberta_detector, chatgpt_roberta_detector_tknz, text)

    # Count the votes for AI and Human
    votes = {"AI": 0, "Human": 0}
    for pred in [roberta_base_pred, chatgpt_lli_hc3_pred, chatgpt_roberta_pred]:
        if pred == 1:
            votes["AI"] += 1
        elif pred == 0:
            votes["Human"] += 1
        else:
            raise AssertionError("A problem exists with the code.")
            
    # Determine final decision based on majority
    if votes["AI"] > votes["Human"]:
        return "AI"
    else:
        return "Human"

# Create Gradio Interface
iface = gr.Interface(
    fn=classify_text, 
    inputs=gr.Textbox(lines=2, placeholder="Enter a sentence to classify..."),
    outputs="text"
)

iface.launch()