Update app.py

app.py

@@ -13,7 +13,7 @@ chroma_client = chromadb.PersistentClient(path=CHROMA_DATA_PATH)
 ef = embedding_functions.DefaultEmbeddingFunction()
 collection = chroma_client.get_or_create_collection(name="yousef_vault", embedding_function=ef)
 
-DEFAULT_MODEL = "huihui-ai/Qwen2.5-72B-Instruct-abliterated"
+DEFAULT_MODEL = "Meta-llama/Llama-4-Maverick-17B-128E-Instruct-FP8"
 
 # --- 2. دالة استخراج النصوص ---
 def process_document(file):