app/utils/chat_model.py

from transformers import AutoModelForCausalLM, AutoTokenizer
import torch

class ChatModel:
    def __init__(self):
        self.tokenizer = AutoTokenizer.from_pretrained("mistralai/Mistral-7B-Instruct-v0.1", token=True)
        self.model = AutoModelForCausalLM.from_pretrained(
            "mistralai/Mistral-7B-v0.1",
            torch_dtype=torch.float16,
            token=True
        )
    
    async def generate_response(self, input_text):
        inputs = self.tokenizer(input_text, return_tensors="pt").to(self.model.device)
        outputs = self.model.generate(
            **inputs,
            max_length=100,
            num_return_sequences=1,
            temperature=0.7
        )
        response = self.tokenizer.decode(outputs[0], skip_special_tokens=True)
        return response