Update app.py

app.py

@@ -33,11 +33,11 @@ os.environ["KERAS_BACKEND"] = "tensorflow"  # or "tensorflow" or "torch"
 keras.mixed_precision.set_global_policy("mixed_float16")
 
 preprocessor = keras_nlp.models.GPT2CausalLMPreprocessor.from_preset(
-    "gpt2_base_en",
+    "gpt2_medium_en",
     sequence_length=128,
 )
 gpt2_lm = keras_nlp.models.GPT2CausalLM.from_preset(
-    "gpt2_base_en", preprocessor=preprocessor
+    "gpt2_medium_en", preprocessor=preprocessor
 )
 
 #drive.mount('/content/drive', force_remount=True)