Update config.json

config.json

@@ -10,5 +10,6 @@
   "num_encoder_layers": 4,
   "torch_dtype": "float32",
   "transformers_version": "4.51.3",
-  "vocab_size": 50258
+  "vocab_size": 50258,
+  "model_type": "gpt2"
 }