diff --git a/README.md b/README.md
index 333838b..90e2a0b 100644
--- a/README.md
+++ b/README.md
@@ -29,7 +29,7 @@ from aiia.model import AIIAConfig
 from aiia.pretrain import Pretrainer
 
 # Create your model
-config = AIIAConfig(model_name="AIIA-Base-512x20k")
+config = AIIAConfig(model_type="AIIA-Base-512x20k")
 model = AIIABase(config)
 
 # Initialize pretrainer with the model
diff --git a/example.py b/example.py
index 8dbb67e..2ce0b6a 100644
--- a/example.py
+++ b/example.py
@@ -1,10 +1,12 @@
-from aiia.model import AIIABase
-from aiia.model import AIIAConfig
-from aiia.pretrain import Pretrainer
+from src.aiia.model import AIIAmoe
+from src.aiia.model import AIIAConfig
+from src.aiia.pretrain import Pretrainer
 
 # Create your model
-config = AIIAConfig(model_name="AIIA-Base-512x20k")
-model = AIIABase(config)
+config = AIIAConfig(num_experts=5)
+model = AIIAmoe(config)
+model.save_pretrained("test")
+model = AIIAmoe.from_pretrained("test")
 
 # Initialize pretrainer with the model
 pretrainer = Pretrainer(model, learning_rate=1e-4, config=config)
diff --git a/pyproject.toml b/pyproject.toml
index e4d1f2a..2220a98 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -10,7 +10,7 @@ include = '\.pyi?$'
 
 [project]
 name = "aiia"
-version = "0.2.1"
+version = "0.3.0"
 description = "AIIA Deep Learning Model Implementation"
 readme = "README.md"
 authors = [
diff --git a/requirements.txt b/requirements.txt
index 8e2d666..60fe329 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -5,4 +5,5 @@ pytest
 pillow
 pandas
 torchvision
-pyarrow
\ No newline at end of file
+pyarrow
+transformers>=4.48.0
\ No newline at end of file
diff --git a/setup.cfg b/setup.cfg
index eeb961d..26614c8 100644
--- a/setup.cfg
+++ b/setup.cfg
@@ -1,6 +1,6 @@
 [metadata]
 name = aiia
-version = 0.2.1
+version = 0.3.0
 author = Falko Habel
 author_email = falko.habel@gmx.de
 description = AIIA deep learning model implementation
diff --git a/src/aiia/__init__.py b/src/aiia/__init__.py
index 838c765..699a42f 100644
--- a/src/aiia/__init__.py
+++ b/src/aiia/__init__.py
@@ -1,7 +1,7 @@
-from .model.Model import AIIABase, AIIABaseShared, AIIAchunked, AIIAmoe, AIIASparseMoe, AIIArecursive
+from .model.Model import AIIABase, AIIABaseShared, AIIAmoe, AIIASparseMoe
 from .model.config import AIIAConfig
 from .data.DataLoader import DataLoader
 from .pretrain.pretrainer import Pretrainer, ProjectionHead
 
 
-__version__ = "0.2.1"
+__version__ = "0.3.0"
diff --git a/src/aiia/model/Model.py b/src/aiia/model/Model.py
index f21a0db..1cdd8dc 100644
--- a/src/aiia/model/Model.py
+++ b/src/aiia/model/Model.py
@@ -1,120 +1,49 @@
 from .config import AIIAConfig
 from torch import nn
+from transformers import PreTrainedModel
 import torch
-import os
 import copy
-import warnings
 
 
-class AIIA(nn.Module):
-    def __init__(self, config: AIIAConfig, **kwargs):
-        super(AIIA, self).__init__()
-        # Create a deep copy of the configuration to avoid sharing
-        self.config = copy.deepcopy(config)
-        
-        # Update the config with any additional keyword arguments
-        for key, value in kwargs.items():
-            setattr(self.config, key, value)
-
-    def save(self, path: str):
-        if not os.path.exists(path):
-            os.makedirs(path, exist_ok=True)
-        torch.save(self.state_dict(), f"{path}/model.pth")
-        self.config.save(path)
-
-    @classmethod
-    def load(cls, path, precision: str = None, strict: bool = True, **kwargs):
-        config = AIIAConfig.load(path)
-        device = 'cuda' if torch.cuda.is_available() else 'cpu'
-        
-        # Load the state dict to analyze structure
-        model_dict = torch.load(f"{path}/model.pth", map_location=device)
-        
-        # Special handling for AIIAmoe - detect number of experts from state_dict
-        if cls.__name__ == "AIIAmoe" and "num_experts" not in kwargs:
-            # Find maximum expert index
-            max_expert_idx = -1
-            for key in model_dict.keys():
-                if key.startswith("experts."):
-                    parts = key.split(".")
-                    if len(parts) > 1:
-                        try:
-                            expert_idx = int(parts[1])
-                            max_expert_idx = max(max_expert_idx, expert_idx)
-                        except ValueError:
-                            pass
-            
-            if max_expert_idx >= 0:
-                # experts.X keys found, use max_expert_idx + 1 as num_experts
-                kwargs["num_experts"] = max_expert_idx + 1
-        
-        # Create model with detected structural parameters
-        model = cls(config, **kwargs)
-        
-        # Handle precision conversion
-        dtype = None
-        if precision is not None:
-            if precision.lower() == 'fp16':
-                dtype = torch.float16
-            elif precision.lower() == 'bf16':
-                if device == 'cuda' and not torch.cuda.is_bf16_supported():
-                    warnings.warn("BF16 is not supported on this GPU. Falling back to FP16.")
-                    dtype = torch.float16
-                else:
-                    dtype = torch.bfloat16
-            else:
-                raise ValueError("Unsupported precision. Use 'fp16', 'bf16', or leave as None.")
-        
-        if dtype is not None:
-            for key, param in model_dict.items():
-                if torch.is_tensor(param):
-                    model_dict[key] = param.to(dtype)
-        
-        # Load state dict with strict parameter for flexibility
-        model.load_state_dict(model_dict, strict=strict)
-        return model
-
-
-class AIIABase(AIIA):
-    def __init__(self, config: AIIAConfig, **kwargs):
-        super().__init__(config=config, **kwargs)  
-        self.config = self.config
+class AIIABase(PreTrainedModel):
+    config_class = AIIAConfig
+    base_model_prefix = "AIIA"
+    
+    def __init__(self, config: AIIAConfig):
+        super().__init__(config)
         
         # Initialize layers based on configuration
         layers = []
-        in_channels = self.config.num_channels
+        in_channels = config.num_channels
         
-        for _ in range(self.config.num_hidden_layers):
+        for _ in range(config.num_hidden_layers):
             layers.extend([
-                nn.Conv2d(in_channels, self.config.hidden_size,
-                          kernel_size=self.config.kernel_size, padding=1),
-                getattr(nn, self.config.activation_function)(),
+                nn.Conv2d(in_channels, config.hidden_size,
+                          kernel_size=config.kernel_size, padding=1),
+                getattr(nn, config.activation_function)(),
                 nn.MaxPool2d(kernel_size=1, stride=1)
              ])
-            in_channels = self.config.hidden_size
+            in_channels = config.hidden_size
         
         self.cnn = nn.Sequential(*layers)
 
     def forward(self, x):
         return self.cnn(x)
     
-class AIIABaseShared(AIIA):
-    def __init__(self, config: AIIAConfig, **kwargs):
+class AIIABaseShared(PreTrainedModel):
+    config_class = AIIAConfig
+    base_model_prefix = "AIIA"
+    
+    def __init__(self, config: AIIAConfig):
+        super().__init__(config)
         """
         Initialize the AIIABaseShared model.
 
         Args:
             config (AIIAConfig): Configuration object containing model parameters.
-            **kwargs: Additional keyword arguments to override configuration settings.
         """
-        super().__init__(config=config, **kwargs)
-        
-        # Update configuration with new parameters if provided
-        self. config = copy.deepcopy(config)
-        
-        for key, value in kwargs.items():
-            setattr(self.config, key, value)
-            
+        super().__init__(config=config)
+                    
         # Initialize the network components
         self._initialize_network()
         self._initialize_activation_andPooling()
@@ -172,16 +101,17 @@ class AIIABaseShared(AIIA):
             
         return out
 
-class AIIAExpert(AIIA):
-    def __init__(self, config: AIIAConfig, base_class=AIIABase, **kwargs):
-        super().__init__(config=config, **kwargs)
-        self.config = self.config
+class AIIAExpert(PreTrainedModel):
+    config_class = AIIAConfig
+    base_model_prefix = "AIIA"
+    def __init__(self, config: AIIAConfig, base_class=AIIABase):
+        super().__init__(config=config)
         
         # Initialize base CNN with configuration and chosen base class
         if issubclass(base_class, AIIABase):
-            self.base_cnn = AIIABase(self.config, **kwargs)
+            self.base_cnn = AIIABase(self.config)
         elif issubclass(base_class, AIIABaseShared):
-            self.base_cnn = AIIABaseShared(self.config, **kwargs)
+            self.base_cnn = AIIABaseShared(self.config)
         else:
             raise ValueError("Invalid base class")
     
@@ -198,31 +128,31 @@ class AIIAExpert(AIIA):
         # Process input through the base CNN
         return self.base_cnn(x)
 
-class AIIAmoe(AIIA):
-    def __init__(self, config: AIIAConfig, num_experts: int = 3, base_class=AIIABase, **kwargs):
-        super().__init__(config=config, **kwargs)
+class AIIAmoe(PreTrainedModel):
+    config_class = AIIAConfig
+    base_model_prefix = "AIIA"
+    
+    def __init__(self, config: AIIAConfig, base_class=AIIABase):
+        super().__init__(config=config)
         self.config = config
 
-        # Update the config to include the number of experts.
-        self.config.num_experts = num_experts
-
-        # Initialize multiple experts from the chosen base class.
+        # Get num_experts directly from config instead of parameter
+        num_experts = getattr(config, "num_experts", 3)  # default to 3 if not in config
+        
+        # Initialize multiple experts from the chosen base class
         self.experts = nn.ModuleList([
-            AIIAExpert(self.config, base_class=base_class, **kwargs)
+            AIIAExpert(self.config, base_class=base_class)
             for _ in range(num_experts)
         ])
 
-        # To generate gating weights, we first need to determine the feature dimension.
-        # Each expert is assumed to return an output of shape (B, C, H, W); after averaging over H and W, 
-        # we obtain a tensor of shape (B, C) where C is the number of channels (here assumed to be 224).
-        gate_in_features = 512  # Adjust this if your expert output changes.
+        gate_in_features = self.config.hidden_size
 
-        # Create a gating network that maps the aggregated features to num_experts weights.
+        # Create a gating network that maps the aggregated features to num_experts weights
         self.gate = nn.Sequential(
             nn.Linear(gate_in_features, num_experts),
             nn.Softmax(dim=1)
         )
-
+        
     def forward(self, x: torch.Tensor) -> torch.Tensor:
         """
         Forward pass for the Mixture-of-Experts model.
@@ -261,9 +191,10 @@ class AIIAmoe(AIIA):
 
 
 class AIIASparseMoe(AIIAmoe):
-    def __init__(self, config: AIIAConfig, num_experts: int = 3, top_k: int = 2, base_class=AIIABase, **kwargs):
-        super().__init__(config=config, num_experts=num_experts, base_class=base_class, **kwargs)
-        self.top_k = top_k
+    config_class = AIIAConfig
+    base_model_prefix = "AIIA"
+    def __init__(self, config: AIIAConfig, base_class=AIIABase):
+        super().__init__(config=config, base_class=base_class)
     
     def forward(self, x: torch.Tensor) -> torch.Tensor:
         # Compute the gate_weights similar to standard moe.
@@ -273,7 +204,7 @@ class AIIASparseMoe(AIIAmoe):
         gate_weights = self.gate(gate_input)
 
         # Select the top-k experts for each input based on gating weights.
-        _, top_k_indices = gate_weights.topk(self.top_k, dim=-1)
+        _, top_k_indices = gate_weights.topk(self.config.top_k, dim=-1)
         
         # Initialize a list to store outputs from selected experts.
         merged_outputs = []
@@ -294,64 +225,7 @@ class AIIASparseMoe(AIIAmoe):
         return torch.cat(merged_outputs, dim=0)
 
 
-class AIIAchunked(AIIA):
-    def __init__(self, config: AIIAConfig, patch_size: int = 16, base_class=AIIABase, **kwargs):
-        super().__init__(config=config, **kwargs)  
-        self.config = self.config
-        
-        # Update config with new parameters if provided
-        self.config.patch_size = patch_size
-        
-        # Initialize base CNN for processing each patch using the specified base class
-        if issubclass(base_class, AIIABase):
-            self.base_cnn = AIIABase(self.config, **kwargs)
-        elif issubclass(base_class, AIIABaseShared):  # Add support for AIIABaseShared
-            self.base_cnn = AIIABaseShared(self.config, **kwargs)
-        else:
-            raise ValueError("Invalid base class")
-
-    def forward(self, x):
-        patches = x.unfold(2, self.patch_size, self.patch_size).unfold(3, self.patch_size, self.patch_size)
-        patches = patches.contiguous().view(patches.size(0), patches.size(1), -1, self.patch_size, self.patch_size)
-        patch_outputs = []
-        
-        for p in torch.split(patches, 1, dim=2):
-            p = p.squeeze(2)
-            po = self.base_cnn(p)
-            patch_outputs.append(po)
-            
-        combined_output = torch.mean(torch.stack(patch_outputs, dim=0), dim=0)
-        return combined_output
-
-class AIIArecursive(AIIA):
-    def __init__(self, config: AIIAConfig, recursion_depth: int = 3, base_class=AIIABase, **kwargs):
-        
-        super().__init__(config=config, **kwargs)
-        self.config = self.config
-        
-        # Pass recursion_depth as a kwarg to the config
-        self.config.recursion_depth = recursion_depth
-            
-        # Initialize chunked CNN with updated config
-        self.chunked_cnn = AIIAchunked(self.config, base_class, **kwargs)
-        
-    def forward(self, x, depth=0):
-        if depth == self.recursion_depth:
-            return self.chunked_cnn(x)
-        else:
-            patches = x.unfold(2, 16, 16).unfold(3, 16, 16)
-            patches = patches.contiguous().view(patches.size(0), patches.size(1), -1, 16, 16)
-            processed_patches = []
-            
-            for p in torch.split(patches, 1, dim=2):
-                p = p.squeeze(2)
-                pp = self.forward(p, depth + 1)
-                processed_patches.append(pp)
-                
-            combined_output = torch.mean(torch.stack(processed_patches, dim=0), dim=0)
-            return combined_output
-
 if __name__ =="__main__":            
     config = AIIAConfig()
     model = AIIAmoe(config, num_experts=5)
-    model.save("test")
\ No newline at end of file
+    model.save_pretrained("test")
\ No newline at end of file
diff --git a/src/aiia/model/__init__.py b/src/aiia/model/__init__.py
index a45512a..88f3211 100644
--- a/src/aiia/model/__init__.py
+++ b/src/aiia/model/__init__.py
@@ -1,20 +1,15 @@
 from .Model import (
     AIIABase,
     AIIABaseShared,
-    AIIAchunked,
     AIIAmoe,
     AIIASparseMoe,
-    AIIArecursive
 )
 from .config import AIIAConfig
 
 __all__ = [
     "AIIABase",
     "AIIABaseShared",
-    "AIIAchunked",
     "AIIAmoe",
     "AIIASparseMoe",
-    "AIIArecursive",
     "AIIAConfig",
-
 ]
\ No newline at end of file
diff --git a/src/aiia/model/config.py b/src/aiia/model/config.py
index a83329a..7bf3d93 100644
--- a/src/aiia/model/config.py
+++ b/src/aiia/model/config.py
@@ -1,29 +1,25 @@
-import torch
+from transformers import PretrainedConfig
 import torch.nn as nn
-import json
-import os 
 
+class AIIAConfig(PretrainedConfig):
+    model_type = "AIIA"  # Add this class attribute
 
-class AIIAConfig:
     def __init__(
         self,
-        model_name: str = "AIIA",
         kernel_size: int = 3,
         activation_function: str = "GELU",
         hidden_size: int = 512,
         num_hidden_layers: int = 12,
         num_channels: int = 3,
-        learning_rate: float = 5e-5,
         **kwargs
     ):
-        self.model_name = model_name
+        super().__init__(**kwargs)
         self.kernel_size = kernel_size
         self.activation_function = activation_function
         self.hidden_size = hidden_size
         self.num_hidden_layers = num_hidden_layers
         self.num_channels = num_channels
-        self.learning_rate = learning_rate
-        
+
         # Store additional keyword arguments as attributes
         for key, value in kwargs.items():
             setattr(self, key, value)
@@ -50,17 +46,4 @@ class AIIAConfig:
             elif isinstance(value, dict):
                 return {k: serialize(v) for k, v in value.items()}
             return value
-        return {k: serialize(v) for k, v in self.__dict__.items()}
-
-    def save(self, file_path):
-        if not os.path.exists(file_path):
-            os.makedirs(file_path, exist_ok=True)
-        with open(os.path.join(file_path, "config.json"), "w") as f:
-            # Save the recursively converted dictionary.
-            json.dump(self.to_dict(), f, indent=4)
-
-    @classmethod
-    def load(cls, file_path):
-        with open(os.path.join(file_path, "config.json"), "r") as f:
-            config_dict = json.load(f)
-        return cls(**config_dict)
\ No newline at end of file
+        return {k: serialize(v) for k, v in self.__dict__.items()}
\ No newline at end of file
diff --git a/src/aiia/pretrain/pretrainer.py b/src/aiia/pretrain/pretrainer.py
index 42ba4b8..93df9dd 100644
--- a/src/aiia/pretrain/pretrainer.py
+++ b/src/aiia/pretrain/pretrainer.py
@@ -3,7 +3,7 @@ from torch import nn
 import csv
 import pandas as pd
 from tqdm import tqdm
-from ..model.Model import AIIA
+from transformers import PreTrainedModel
 from ..model.config import AIIAConfig
 from ..data.DataLoader import AIIADataLoader
 import os
@@ -21,12 +21,12 @@ class ProjectionHead(nn.Module):
             return self.conv_rotate(x).mean(dim=(2, 3))  # Global average pooling for rotation task
 
 class Pretrainer:
-    def __init__(self, model: AIIA, learning_rate=1e-4, config: AIIAConfig=None):
+    def __init__(self, model: PreTrainedModel, learning_rate=1e-4, config: AIIAConfig=None):
         """
         Initialize the pretrainer with a model.
         
         Args:
-            model (AIIA): The model instance to pretrain
+            model (PreTrainedModel): The model instance to pretrain
             learning_rate (float): Learning rate for optimization
             config (dict): Model configuration containing hidden_size
         """
@@ -186,11 +186,11 @@ class Pretrainer:
             
             if val_loss < best_val_loss:
                 best_val_loss = val_loss
-                self.model.save(output_path)
-                print("Best model saved!")
+                self.model.save_pretrained(output_path)
+                print("Best model save_pretrainedd!")
 
         losses_path = os.path.join(os.path.dirname(output_path), 'losses.csv')
-        self.save_losses(losses_path)
+        self.save_pretrained_losses(losses_path)
 
     def _validate(self, val_loader, criterion_denoise, criterion_rotate):
         """Perform validation and return average validation loss."""
@@ -216,8 +216,8 @@ class Pretrainer:
         return avg_val_loss
 
 
-    def save_losses(self, csv_file):
-        """Save training and validation losses to a CSV file."""
+    def save_pretrained_losses(self, csv_file):
+        """save_pretrained training and validation losses to a CSV file."""
         data = list(zip(
             range(1, len(self.train_losses) + 1),
             self.train_losses,
diff --git a/tests/model/test_aiia.py b/tests/model/test_aiia.py
index bffa616..4891472 100644
--- a/tests/model/test_aiia.py
+++ b/tests/model/test_aiia.py
@@ -1,159 +1,133 @@
 import os
 import torch
-from aiia.model.Model import AIIABase, AIIABaseShared, AIIAExpert, AIIAmoe, AIIAchunked, AIIAConfig, AIIASparseMoe
+from aiia.model.Model import AIIABase, AIIABaseShared, AIIAExpert, AIIAmoe, AIIAConfig, AIIASparseMoe
 
 def test_aiiabase_creation():
     config = AIIAConfig()
     model = AIIABase(config)
     assert isinstance(model, AIIABase)
 
-def test_aiiabase_save_load():
+def test_aiiabase_save_pretrained_from_pretrained():
     config = AIIAConfig()
     model = AIIABase(config)
-    save_path = "test_aiiabase_save_load"
+    save_pretrained_path = "test_aiiabase_save_pretrained_load"
 
     # Save the model
-    model.save(save_path)
-    assert os.path.exists(os.path.join(save_path, "model.pth"))
-    assert os.path.exists(os.path.join(save_path, "config.json"))
+    model.save_pretrained(save_pretrained_path)
+    assert os.path.exists(os.path.join(save_pretrained_path, "model.safetensors"))
+    assert os.path.exists(os.path.join(save_pretrained_path, "config.json"))
 
     # Load the model
-    loaded_model = AIIABase.load(save_path)
+    loaded_model = AIIABase.from_pretrained(save_pretrained_path)
 
     # Check if the loaded model is an instance of AIIABase
     assert isinstance(loaded_model, AIIABase)
 
     # Clean up
-    os.remove(os.path.join(save_path, "model.pth"))
-    os.remove(os.path.join(save_path, "config.json"))
-    os.rmdir(save_path)
+    os.remove(os.path.join(save_pretrained_path, "model.safetensors"))
+    os.remove(os.path.join(save_pretrained_path, "config.json"))
+    os.rmdir(save_pretrained_path)
 
 def test_aiiabase_shared_creation():
     config = AIIAConfig()
     model = AIIABaseShared(config)
     assert isinstance(model, AIIABaseShared)
 
-def test_aiiabase_shared_save_load():
+def test_aiiabase_shared_save_pretrained_from_pretrained():
     config = AIIAConfig()
     model = AIIABaseShared(config)
-    save_path = "test_aiiabase_shared_save_load"
+    save_pretrained_path = "test_aiiabase_shared_save_pretrained_load"
 
     # Save the model
-    model.save(save_path)
-    assert os.path.exists(os.path.join(save_path, "model.pth"))
-    assert os.path.exists(os.path.join(save_path, "config.json"))
+    model.save_pretrained(save_pretrained_path)
+    assert os.path.exists(os.path.join(save_pretrained_path, "model.safetensors"))
+    assert os.path.exists(os.path.join(save_pretrained_path, "config.json"))
 
     # Load the model
-    loaded_model = AIIABaseShared.load(save_path)
+    loaded_model = AIIABaseShared.from_pretrained(save_pretrained_path)
 
     # Check if the loaded model is an instance of AIIABaseShared
     assert isinstance(loaded_model, AIIABaseShared)
 
     # Clean up
-    os.remove(os.path.join(save_path, "model.pth"))
-    os.remove(os.path.join(save_path, "config.json"))
-    os.rmdir(save_path)
+    os.remove(os.path.join(save_pretrained_path, "model.safetensors"))
+    os.remove(os.path.join(save_pretrained_path, "config.json"))
+    os.rmdir(save_pretrained_path)
 
 def test_aiiaexpert_creation():
     config = AIIAConfig()
     model = AIIAExpert(config)
     assert isinstance(model, AIIAExpert)
 
-def test_aiiaexpert_save_load():
+def test_aiiaexpert_save_pretrained_from_pretrained():
     config = AIIAConfig()
     model = AIIAExpert(config)
-    save_path = "test_aiiaexpert_save_load"
+    save_pretrained_path = "test_aiiaexpert_save_pretrained_load"
 
     # Save the model
-    model.save(save_path)
-    assert os.path.exists(os.path.join(save_path, "model.pth"))
-    assert os.path.exists(os.path.join(save_path, "config.json"))
+    model.save_pretrained(save_pretrained_path)
+    assert os.path.exists(os.path.join(save_pretrained_path, "model.safetensors"))
+    assert os.path.exists(os.path.join(save_pretrained_path, "config.json"))
 
     # Load the model
-    loaded_model = AIIAExpert.load(save_path)
+    loaded_model = AIIAExpert.from_pretrained(save_pretrained_path)
 
     # Check if the loaded model is an instance of AIIAExpert
     assert isinstance(loaded_model, AIIAExpert)
 
     # Clean up
-    os.remove(os.path.join(save_path, "model.pth"))
-    os.remove(os.path.join(save_path, "config.json"))
-    os.rmdir(save_path)
+    os.remove(os.path.join(save_pretrained_path, "model.safetensors"))
+    os.remove(os.path.join(save_pretrained_path, "config.json"))
+    os.rmdir(save_pretrained_path)
 
 def test_aiiamoe_creation():
-    config = AIIAConfig()
-    model = AIIAmoe(config, num_experts=5)
+    config = AIIAConfig(num_experts=3)
+    model = AIIAmoe(config)
     assert isinstance(model, AIIAmoe)
 
-def test_aiiamoe_save_load():
-    config = AIIAConfig()
-    model = AIIAmoe(config, num_experts=5)
-    save_path = "test_aiiamoe_save_load"
+def test_aiiamoe_save_pretrained_from_pretrained():
+    config = AIIAConfig(num_experts=3)
+    model = AIIAmoe(config)
+    save_pretrained_path = "test_aiiamoe_save_pretrained_load"
 
     # Save the model
-    model.save(save_path)
-    assert os.path.exists(os.path.join(save_path, "model.pth"))
-    assert os.path.exists(os.path.join(save_path, "config.json"))
+    model.save_pretrained(save_pretrained_path)
+    assert os.path.exists(os.path.join(save_pretrained_path, "model.safetensors"))
+    assert os.path.exists(os.path.join(save_pretrained_path, "config.json"))
 
     # Load the model
-    loaded_model = AIIAmoe.load(save_path)
+    loaded_model = AIIAmoe.from_pretrained(save_pretrained_path)
 
     # Check if the loaded model is an instance of AIIAmoe
     assert isinstance(loaded_model, AIIAmoe)
 
     # Clean up
-    os.remove(os.path.join(save_path, "model.pth"))
-    os.remove(os.path.join(save_path, "config.json"))
-    os.rmdir(save_path)
+    os.remove(os.path.join(save_pretrained_path, "model.safetensors"))
+    os.remove(os.path.join(save_pretrained_path, "config.json"))
+    os.rmdir(save_pretrained_path)
 
 def test_aiiasparsemoe_creation():
-    config = AIIAConfig()
-    model = AIIASparseMoe(config, num_experts=5, top_k=2)
+    config = AIIAConfig(num_experts=5, top_k=2)
+    model = AIIASparseMoe(config, base_class=AIIABaseShared)
     assert isinstance(model, AIIASparseMoe)
 
-def test_aiiasparsemoe_save_load():
-    config = AIIAConfig()
-    model = AIIASparseMoe(config, num_experts=3, top_k=1)
-    save_path = "test_aiiasparsemoe_save_load"
-    
+def test_aiiasparsemoe_save_pretrained_from_pretrained():
+    config = AIIAConfig(num_experts=3, top_k=1)
+    model = AIIASparseMoe(config)
+    save_pretrained_path = "test_aiiasparsemoe_save_pretrained_load"
+
     # Save the model
-    model.save(save_path)
-    assert os.path.exists(os.path.join(save_path, "model.pth"))
-    assert os.path.exists(os.path.join(save_path, "config.json"))
+    model.save_pretrained(save_pretrained_path)
+    assert os.path.exists(os.path.join(save_pretrained_path, "model.safetensors"))
+    assert os.path.exists(os.path.join(save_pretrained_path, "config.json"))
 
     # Load the model
-    loaded_model = AIIASparseMoe.load(save_path)
+    loaded_model = AIIASparseMoe.from_pretrained(save_pretrained_path)
 
     # Check if the loaded model is an instance of AIIASparseMoe
     assert isinstance(loaded_model, AIIASparseMoe)
 
     # Clean up
-    os.remove(os.path.join(save_path, "model.pth"))
-    os.remove(os.path.join(save_path, "config.json"))
-    os.rmdir(save_path)
-
-def test_aiiachunked_creation():
-    config = AIIAConfig()
-    model = AIIAchunked(config)
-    assert isinstance(model, AIIAchunked)
-
-def test_aiiachunked_save_load():
-    config = AIIAConfig()
-    model = AIIAchunked(config)
-    save_path = "test_aiiachunked_save_load"
-
-    # Save the model
-    model.save(save_path)
-    assert os.path.exists(os.path.join(save_path, "model.pth"))
-    assert os.path.exists(os.path.join(save_path, "config.json"))
-
-    # Load the model
-    loaded_model = AIIAchunked.load(save_path)
-
-    # Check if the loaded model is an instance of AIIAchunked
-    assert isinstance(loaded_model, AIIAchunked)
-
-    # Clean up
-    os.remove(os.path.join(save_path, "model.pth"))
-    os.remove(os.path.join(save_path, "config.json"))
-    os.rmdir(save_path)
\ No newline at end of file
+    os.remove(os.path.join(save_pretrained_path, "model.safetensors"))
+    os.remove(os.path.join(save_pretrained_path, "config.json"))
+    os.rmdir(save_pretrained_path)
\ No newline at end of file
diff --git a/tests/model/test_config.py b/tests/model/test_config.py
index 5542a79..5789660 100644
--- a/tests/model/test_config.py
+++ b/tests/model/test_config.py
@@ -1,75 +1,77 @@
 import os
 import tempfile
 import pytest
-import torch.nn as nn
 from aiia import AIIAConfig
 
+
 def test_aiia_config_initialization():
     config = AIIAConfig()
-    assert config.model_name == "AIIA"
+    assert config.model_type == "AIIA"
     assert config.kernel_size == 3
     assert config.activation_function == "GELU"
     assert config.hidden_size == 512
     assert config.num_hidden_layers == 12
     assert config.num_channels == 3
-    assert config.learning_rate == 5e-5
+
 
 def test_aiia_config_custom_initialization():
     config = AIIAConfig(
-        model_name="CustomModel",
+        model_type="CustomModel",
         kernel_size=5,
         activation_function="ReLU",
         hidden_size=1024,
         num_hidden_layers=8,
-        num_channels=1,
-        learning_rate=1e-4
+        num_channels=1
     )
-    assert config.model_name == "CustomModel"
+    assert config.model_type == "CustomModel"
     assert config.kernel_size == 5
     assert config.activation_function == "ReLU"
     assert config.hidden_size == 1024
     assert config.num_hidden_layers == 8
     assert config.num_channels == 1
-    assert config.learning_rate == 1e-4
+
 
 def test_aiia_config_invalid_activation_function():
     with pytest.raises(ValueError):
         AIIAConfig(activation_function="InvalidFunction")
 
+
 def test_aiia_config_to_dict():
     config = AIIAConfig()
     config_dict = config.to_dict()
     assert isinstance(config_dict, dict)
-    assert config_dict["model_name"] == "AIIA"
     assert config_dict["kernel_size"] == 3
 
-def test_aiia_config_save_and_load():
-    with tempfile.TemporaryDirectory() as tmpdir:
-        config = AIIAConfig(model_name="TempModel")
-        save_path = os.path.join(tmpdir, "config")
-        config.save(save_path)
 
-        loaded_config = AIIAConfig.load(save_path)
-        assert loaded_config.model_name == "TempModel"
+def test_aiia_config_save_pretrained_and_from_pretrained():
+    with tempfile.TemporaryDirectory() as tmpdir:
+        config = AIIAConfig(model_type="TempModel")
+        save_pretrained_path = os.path.join(tmpdir, "config")
+        config.save_pretrained(save_pretrained_path)
+
+        loaded_config = AIIAConfig.from_pretrained(save_pretrained_path)
+        assert loaded_config.model_type == "TempModel"
         assert loaded_config.kernel_size == 3
         assert loaded_config.activation_function == "GELU"
 
-def test_aiia_config_save_and_load_with_custom_attributes():
-    with tempfile.TemporaryDirectory() as tmpdir:
-        config = AIIAConfig(model_name="TempModel", custom_attr="value")
-        save_path = os.path.join(tmpdir, "config")
-        config.save(save_path)
 
-        loaded_config = AIIAConfig.load(save_path)
-        assert loaded_config.model_name == "TempModel"
+def test_aiia_config_save_pretrained_and_load_with_custom_attributes():
+    with tempfile.TemporaryDirectory() as tmpdir:
+        config = AIIAConfig(model_type="TempModel", custom_attr="value")
+        save_pretrained_path = os.path.join(tmpdir, "config")
+        config.save_pretrained(save_pretrained_path)
+
+        loaded_config = AIIAConfig.from_pretrained(save_pretrained_path)
+        assert loaded_config.model_type == "TempModel"
         assert loaded_config.custom_attr == "value"
 
-def test_aiia_config_save_and_load_with_nested_attributes():
-    with tempfile.TemporaryDirectory() as tmpdir:
-        config = AIIAConfig(model_name="TempModel", nested={"key": "value"})
-        save_path = os.path.join(tmpdir, "config")
-        config.save(save_path)
 
-        loaded_config = AIIAConfig.load(save_path)
-        assert loaded_config.model_name == "TempModel"
-        assert loaded_config.nested == {"key": "value"}
+def test_aiia_config_save_pretrained_and_load_with_nested_attributes():
+    with tempfile.TemporaryDirectory() as tmpdir:
+        config = AIIAConfig(model_type="TempModel", nested={"key": "value"})
+        save_pretrained_path = os.path.join(tmpdir, "config")
+        config.save_pretrained(save_pretrained_path)
+
+        loaded_config = AIIAConfig.from_pretrained(save_pretrained_path)
+        assert loaded_config.model_type == "TempModel"
+        assert loaded_config.nested == {"key": "value"}
\ No newline at end of file
diff --git a/tests/pretrain/test_pretrainer.py b/tests/pretrain/test_pretrainer.py
index db4c73f..8f4283c 100644
--- a/tests/pretrain/test_pretrainer.py
+++ b/tests/pretrain/test_pretrainer.py
@@ -94,7 +94,7 @@ def test_train_happy_path(mock_print, mock_path_join, mock_data_loader, mock_rea
     # Execute training with patched methods
     with patch.object(Pretrainer, '_process_batch', return_value=mock_batch_loss) as mock_process_batch, \
          patch.object(Pretrainer, '_validate', side_effect=[0.8, 0.3]) as mock_validate, \
-         patch.object(Pretrainer, 'save_losses') as mock_save_losses, \
+         patch.object(Pretrainer, 'save_pretrained_losses') as mock_save_pretrained_losses, \
          patch('builtins.open', mock_open()):
 
         pretrainer.train(dataset_paths, output_path=output_path, num_epochs=2)
@@ -104,10 +104,10 @@ def test_train_happy_path(mock_print, mock_path_join, mock_data_loader, mock_rea
     assert mock_process_batch.call_count == 2
     assert mock_validate.call_count == 2
     
-    # Check for "Best model saved!" instead of model.save()
-    mock_print.assert_any_call("Best model saved!")
+    # Check for "Best model save_pretrainedd!" instead of model.save_pretrained()
+    mock_print.assert_any_call("Best model save_pretrainedd!")
     
-    mock_save_losses.assert_called_once()
+    mock_save_pretrained_losses.assert_called_once()
 
     # Verify state changes
     assert len(pretrainer.train_losses) == 2
@@ -153,13 +153,13 @@ def test_train_empty_loaders(mock_data_loader, mock_read_parquet, mock_concat):
     pretrainer.projection_head = MagicMock()
     pretrainer.optimizer = MagicMock()
 
-    with patch.object(Pretrainer, 'save_losses') as mock_save_losses:
+    with patch.object(Pretrainer, 'save_pretrained_losses') as mock_save_pretrained_losses:
         pretrainer.train(['path/to/dataset.parquet'], num_epochs=1)
 
     # Verify empty loader behavior
     assert len(pretrainer.train_losses) == 1
     assert pretrainer.train_losses[0] == 0.0
-    mock_save_losses.assert_called_once()
+    mock_save_pretrained_losses.assert_called_once()
 
 @patch('pandas.concat')
 @patch('pandas.read_parquet')
@@ -180,7 +180,7 @@ def test_train_none_batch_data(mock_data_loader, mock_read_parquet, mock_concat)
     pretrainer.optimizer = MagicMock()
 
     with patch.object(Pretrainer, '_process_batch') as mock_process_batch, \
-         patch.object(Pretrainer, 'save_losses'):
+         patch.object(Pretrainer, 'save_pretrained_losses'):
         pretrainer.train(['path/to/dataset.parquet'], num_epochs=1)
 
     # Verify None batch handling
@@ -212,7 +212,7 @@ def test_train_with_custom_parameters(mock_data_loader, mock_read_parquet, mock_
     custom_batch_size = 16
     custom_sample_size = 5000
 
-    with patch.object(Pretrainer, 'save_losses'):
+    with patch.object(Pretrainer, 'save_pretrained_losses'):
         pretrainer.train(
             ['path/to/dataset.parquet'],
             output_path=custom_output_path,
@@ -233,7 +233,7 @@ def test_train_with_custom_parameters(mock_data_loader, mock_read_parquet, mock_
 @patch('aiia.pretrain.pretrainer.AIIADataLoader')
 @patch('builtins.print')  # Add this to mock the print function
 def test_train_validation_loss_improvement(mock_print, mock_data_loader, mock_read_parquet, mock_concat):
-    """Test that model is saved only when validation loss improves."""
+    """Test that model is save_pretrainedd only when validation loss improves."""
     real_df = pd.DataFrame({'image_bytes': [torch.randn(1, 3, 224, 224).tolist()]})
     mock_read_parquet.return_value.head.return_value = real_df
     mock_concat.return_value = real_df
@@ -262,11 +262,11 @@ def test_train_validation_loss_improvement(mock_print, mock_data_loader, mock_re
     # Test improving validation loss
     with patch.object(Pretrainer, '_process_batch', return_value=mock_batch_loss), \
         patch.object(Pretrainer, '_validate', side_effect=[3.0, 2.0, 1.0]), \
-        patch.object(Pretrainer, 'save_losses'):
+        patch.object(Pretrainer, 'save_pretrained_losses'):
         pretrainer.train(['path/to/dataset.parquet'], num_epochs=3)
 
-    # Check for "Best model saved!" 3 times
-    assert mock_print.call_args_list.count(call("Best model saved!")) == 3
+    # Check for "Best model save_pretrainedd!" 3 times
+    assert mock_print.call_args_list.count(call("Best model save_pretrainedd!")) == 3
 
     # Reset for next test
     mock_print.reset_mock()
@@ -278,11 +278,11 @@ def test_train_validation_loss_improvement(mock_print, mock_data_loader, mock_re
     # Test fluctuating validation loss
     with patch.object(Pretrainer, '_process_batch', return_value=mock_batch_loss), \
         patch.object(Pretrainer, '_validate', side_effect=[3.0, 4.0, 2.0]), \
-        patch.object(Pretrainer, 'save_losses'):
+        patch.object(Pretrainer, 'save_pretrained_losses'):
         pretrainer.train(['path/to/dataset.parquet'], num_epochs=3)
 
-    # Should print "Best model saved!" only on first and third epochs
-    assert mock_print.call_args_list.count(call("Best model saved!")) == 2
+    # Should print "Best model save_pretrainedd!" only on first and third epochs
+    assert mock_print.call_args_list.count(call("Best model save_pretrainedd!")) == 2
 
 
 @patch('aiia.pretrain.pretrainer.Pretrainer._process_batch')
@@ -296,13 +296,13 @@ def test_validate(mock_process_batch):
     loss = pretrainer._validate(val_loader, criterion_denoise, criterion_rotate)
     assert loss == 0.5
 
-# Test the save_losses method
-@patch('aiia.pretrain.pretrainer.Pretrainer.save_losses')
-def test_save_losses(mock_save_losses):
+# Test the save_pretrained_losses method
+@patch('aiia.pretrain.pretrainer.Pretrainer.save_pretrained_losses')
+def test_save_pretrained_losses(mock_save_pretrained_losses):
     pretrainer = Pretrainer(model=AIIABase(config=AIIAConfig()), config=AIIAConfig())
     pretrainer.train_losses = [0.1, 0.2]
     pretrainer.val_losses = [0.3, 0.4]
 
     csv_file = 'losses.csv'
-    pretrainer.save_losses(csv_file)
-    mock_save_losses.assert_called_once_with(csv_file)
\ No newline at end of file
+    pretrainer.save_pretrained_losses(csv_file)
+    mock_save_pretrained_losses.assert_called_once_with(csv_file)
\ No newline at end of file