Update app.py

app.py

@@ -4,7 +4,7 @@ from transformers import AutoModelForCausalLM, AutoTokenizer, TextIteratorStream
 from threading import Thread
 
 # Smart & Stable 1.5B Model - Identity Locked
-model_id = "Qwen/Qwen2.5-1.5B-Instruct"
+model_id = "Qwen/Qwen2.5-0.5B-Instruct"
 tokenizer = AutoTokenizer.from_pretrained(model_id)
 model = AutoModelForCausalLM.from_pretrained(model_id, torch_dtype=torch.float16, device_map="auto")