diff --git a/devchat/config.py b/devchat/config.py
index 0cb7dd13..c2c34d59 100644
--- a/devchat/config.py
+++ b/devchat/config.py
@@ -8,7 +8,7 @@
 from devchat.anthropic import AnthropicChatParameters
 
 
-class ClientType(str, Enum):
+class Client(str, Enum):
     OPENAI = "openai"
     ANTHROPIC = "anthropic"
 
@@ -19,41 +19,36 @@ class OpenAIClientConfig(BaseModel, extra='forbid'):
     api_type: Optional[str]
     api_version: Optional[str]
     deployment_name: Optional[str]
-    # client-level parameters
-    parameters: Optional[OpenAIChatParameters] = OpenAIChatParameters()
 
 
 class AnthropicClientConfig(BaseModel, extra='forbid'):
     api_key: str
     api_base: Optional[str]
     timeout: Optional[float]
-    # client-level parameters
-    parameters: Optional[AnthropicChatParameters] = AnthropicChatParameters()
 
 
 class ProviderConfig(BaseModel, extra='forbid', use_enum_values=True):
     id: str
-    client_type: ClientType
+    client: Client
     client_config: Union[OpenAIClientConfig, AnthropicClientConfig]
 
     @validator('client_config', pre=True)
     def create_client_config(cls, config, values):  # pylint: disable=E0213
         if not isinstance(config, dict):
             return config
-        if 'client_type' in values:
-            if values['client_type'] == ClientType.OPENAI:
+        if 'client' in values:
+            if values['client'] == Client.OPENAI:
                 return OpenAIClientConfig(**config)
-            if values['client_type'] == ClientType.ANTHROPIC:
+            if values['client'] == Client.ANTHROPIC:
                 return AnthropicClientConfig(**config)
-        raise ValueError(f"Invalid client_type in {values}")
+        raise ValueError(f"Invalid client in {values}")
 
 
 class ModelConfig(BaseModel, extra='forbid'):
     id: str
     max_input_tokens: Optional[int] = sys.maxsize
-    # model-level parameters that override client-level parameters
     parameters: Optional[Union[OpenAIChatParameters, AnthropicChatParameters]]
-    provider_id: Optional[str]
+    provider: Optional[str]
 
 
 class ChatConfig(BaseModel, extra='forbid'):
@@ -75,17 +70,20 @@ def _load_and_validate_config(self) -> ChatConfig:
         for index, provider in enumerate(config_data['providers']):
             config_data['providers'][index] = ProviderConfig(**provider)
         for model in config_data['models']:
-            if 'provider_id' not in model:
-                raise ValueError(f"Model in {self.config_path} is missing provider_id")
+            if 'provider' not in model:
+                raise ValueError(f"Model in {self.config_path} is missing provider")
             if 'parameters' in model:
-                providers = [p for p in config_data['providers'] if p.id == model['provider_id']]
+                providers = [p for p in config_data['providers'] if p.id == model['provider']]
                 if len(providers) < 1:
-                    raise ValueError(f"Model in {self.config_path} has invalid provider_id: "
-                                     f"{model['provider_id']}")
-                client = providers[0].client_config
-                parameters_data = client.parameters.dict(exclude_unset=True)
-                parameters_data.update(model['parameters'])
-                model['parameters'] = client.parameters.parse_obj(parameters_data)
+                    raise ValueError(f"Model in {self.config_path} has invalid provider: "
+                                     f"{model['provider']}")
+                if providers[0].client == Client.OPENAI:
+                    model['parameters'] = OpenAIChatParameters(**model['parameters'])
+                elif providers[0].client == Client.ANTHROPIC:
+                    model['parameters'] = AnthropicChatParameters(**model['parameters'])
+                else:
+                    raise ValueError(f"Model in {self.config_path} has invalid client: "
+                                     f"{providers[0].client}")
         return ChatConfig(**config_data)
 
     def model_config(self, model_id: Optional[str] = None) -> ModelConfig:
@@ -127,17 +125,17 @@ def _create_sample_config(self):
             providers=[
                 ProviderConfig(
                     id="devchat",
-                    client_type=ClientType.OPENAI,
+                    client=Client.OPENAI,
                     client_config=OpenAIClientConfig(api_key="DC....SET.THIS")
                 ),
                 ProviderConfig(
                     id="openai",
-                    client_type=ClientType.OPENAI,
+                    client=Client.OPENAI,
                     client_config=OpenAIClientConfig(api_key="sk-...SET-THIS")
                 ),
                 ProviderConfig(
                     id="azure-openai",
-                    client_type=ClientType.OPENAI,
+                    client=Client.OPENAI,
                     client_config=OpenAIClientConfig(
                         api_key="YOUR_AZURE_OPENAI_KEY",
                         api_base="YOUR_AZURE_OPENAI_ENDPOINT",
@@ -147,7 +145,7 @@ def _create_sample_config(self):
                 ),
                 ProviderConfig(
                     id="anthropic",
-                    client_type=ClientType.ANTHROPIC,
+                    client=Client.ANTHROPIC,
                     client_config=AnthropicClientConfig(api_key="sk-ant-...SET-THIS", timeout=30)
                 )
             ],
@@ -156,24 +154,24 @@ def _create_sample_config(self):
                     id="gpt-4",
                     max_input_tokens=6000,
                     parameters=OpenAIChatParameters(temperature=0, stream=True),
-                    provider_id='devchat'
+                    provider='devchat'
                 ),
                 ModelConfig(
                     id="gpt-3.5-turbo-16k",
                     max_input_tokens=12000,
                     parameters=OpenAIChatParameters(temperature=0, stream=True),
-                    provider_id='devchat'
+                    provider='devchat'
                 ),
                 ModelConfig(
                     id="gpt-3.5-turbo",
                     max_input_tokens=3000,
                     parameters=OpenAIChatParameters(temperature=0, stream=True),
-                    provider_id='devchat'
+                    provider='devchat'
                 ),
                 ModelConfig(
                     id="claude-2",
                     parameters=AnthropicChatParameters(max_tokens_to_sample=20000),
-                    provider_id='anthropic'
+                    provider='anthropic'
                 )
             ]
         )
diff --git a/tests/test_cli_prompt.py b/tests/test_cli_prompt.py
index c831c826..45e033a9 100644
--- a/tests/test_cli_prompt.py
+++ b/tests/test_cli_prompt.py
@@ -28,7 +28,7 @@ def test_prompt_with_temp_config_file(mock_home_dir):
     config_data = f"""
     providers:
       - id: openai
-        client_type: openai
+        client: openai
         client_config:
           api_key: {os.environ['OPENAI_API_KEY']}
     models:
@@ -36,7 +36,7 @@ def test_prompt_with_temp_config_file(mock_home_dir):
         max_input_tokens: 3000
         parameters:
           temperature: 0
-        provider_id: openai
+        provider: openai
     """
 
     chat_dir = os.path.join(mock_home_dir, ".chat")