diff --git a/bot.py b/bot.py
index 5bcac18..d285471 100644
--- a/bot.py
+++ b/bot.py
@@ -18,8 +18,8 @@ parser.add_argument('-m', '--model', default='model',
 args = parser.parse_args()
 
 
-tokenizer = AutoTokenizer.from_pretrained('gpt2-large')
-model = AutoModelForCausalLM.from_pretrained(args.model).to('cuda')
+tokenizer = AutoTokenizer.from_pretrained('gpt2-medium')
+model = AutoModelForCausalLM.from_pretrained(args.model, low_cpu_mem_usage=True).to('cuda')
 
 
 if args.input is None:
@@ -74,7 +74,7 @@ if args.input is None:
 print(args.input)
 inputs = tokenizer.encode(args.input, return_tensors='pt').to('cuda')
 output = tokenizer.decode(model.generate(
-    inputs, do_sample=True, max_length=150, top_p=0.9)[0])
+    inputs, max_length=150, do_sample=True, top_p=0.9)[0])
 print(output)
 
 
diff --git a/train.py b/train.py
index 2e7d6df..cbf5372 100644
--- a/train.py
+++ b/train.py
@@ -1,7 +1,6 @@
 from argparse import ArgumentParser
 from itertools import chain
 
-from torch import float16
 from datasets import load_dataset
 from transformers import AutoTokenizer, AutoModelForCausalLM, Trainer, TrainingArguments, default_data_collator
 
@@ -22,7 +21,7 @@ tokenized_dataset = raw_dataset.map(lambda examples: tokenizer(examples['text'])
 
 
 # Generate chunks of block_size
-block_size = 256 # tokenizer.model_max_length
+block_size = tokenizer.model_max_length
 
 # Main data processing function that will concatenate all texts from our dataset and generate chunks of block_size.
 def group_texts(examples):
@@ -38,16 +37,16 @@ def group_texts(examples):
         k: [t[i : i + block_size] for i in range(0, total_length, block_size)]
         for k, t in concatenated_examples.items()
     }
-    result["labels"] = result["input_ids"].copy()
+    result['labels'] = result['input_ids'].copy()
     return result
 
 lm_dataset = tokenized_dataset.map(group_texts, batched=True)
 
 
 # Create and train the model
-model = AutoModelForCausalLM.from_pretrained('gpt2-large',
-    torch_dtype=float16, low_cpu_mem_usage=True).to('cuda')
-trainer = Trainer(model, TrainingArguments(output_dir=args.output, per_device_train_batch_size=1),
-                  default_data_collator, lm_dataset['train'])
+model = AutoModelForCausalLM.from_pretrained('gpt2-large', low_cpu_mem_usage=True).to('cuda')
+trainer = Trainer(model, TrainingArguments(output_dir=args.output, save_strategy='no',
+    per_device_train_batch_size=1, gradient_checkpointing=True, optim='adafactor'),
+    default_data_collator, lm_dataset['train'])
 trainer.train()
 trainer.save_model()