diff --git a/ms_agent/agent/base.py b/ms_agent/agent/base.py
index cbb9db911..421d30be4 100644
--- a/ms_agent/agent/base.py
+++ b/ms_agent/agent/base.py
@@ -43,7 +43,7 @@ def __init__(self,
                  trust_remote_code: bool = False):
         if config_dir_or_id is not None:
             self.config: DictConfig = Config.from_task(config_dir_or_id, env)
-        elif config is not None:
+        elif config is not None and isinstance(config, DictConfig):
             self.config: DictConfig = config
         else:
             self.config: DictConfig = Config.from_task(DEFAULT_YAML)
@@ -52,7 +52,7 @@ def __init__(self,
             self.tag = getattr(config, 'tag', None) or self.DEFAULT_TAG
         else:
             self.tag = tag
-        self.config.tag = self.tag
+        setattr(self.config, 'tag', self.tag)
         self.trust_remote_code = trust_remote_code
         self.config.trust_remote_code = trust_remote_code
         self.handler: Optional[ConfigLifecycleHandler] = None
diff --git a/ms_agent/llm/anthropic_llm.py b/ms_agent/llm/anthropic_llm.py
new file mode 100644
index 000000000..b684208d0
--- /dev/null
+++ b/ms_agent/llm/anthropic_llm.py
@@ -0,0 +1,288 @@
+import inspect
+from typing import Any, Dict, Generator, Iterator, List, Optional, Union
+
+import json5
+from ms_agent.llm import LLM
+from ms_agent.llm.utils import Message, Tool, ToolCall
+from ms_agent.utils import assert_package_exist, get_logger, retry
+from omegaconf import DictConfig, OmegaConf
+
+
+class Anthropic(LLM):
+
+    def __init__(
+        self,
+        config: DictConfig,
+        base_url: Optional[str] = None,
+        api_key: Optional[str] = None,
+    ):
+        super().__init__(config)
+        assert_package_exist('anthropic', 'anthropic')
+        import anthropic
+
+        self.model: str = config.llm.model
+
+        base_url = base_url or config.llm.get('anthropic_base_url')
+        api_key = api_key or config.llm.get('anthropic_api_key')
+
+        if not api_key:
+            raise ValueError('Anthropic API key is required.')
+
+        self.client = anthropic.Anthropic(
+            api_key=api_key,
+            base_url=base_url,
+        )
+
+        self.args: Dict = OmegaConf.to_container(
+            getattr(config, 'generation_config', DictConfig({})))
+
+    def format_tools(self,
+                     tools: Optional[List[Tool]]) -> Optional[List[Dict]]:
+        if not tools:
+            return None
+
+        formatted_tools = []
+        for tool in tools:
+            formatted_tools.append({
+                'name': tool['tool_name'],
+                'description': tool.get('description', ''),
+                'input_schema': {
+                    'type': 'object',
+                    'properties': tool.get('parameters',
+                                           {}).get('properties', {}),
+                    'required': tool.get('parameters', {}).get('required', []),
+                }
+            })
+        return formatted_tools
+
+    def _format_input_message(self,
+                              messages: List[Message]) -> List[Dict[str, Any]]:
+        """Converts a list of Message objects into the format expected by the Anthropic API.
+
+        Args:
+            messages (`List[Message]`): List of Message objects.
+
+        Returns:
+            List[Dict[str, Any]]: List of dictionaries compatible with Anthropic's input format.
+        """
+        formatted_messages = []
+        for msg in messages:
+            content = []
+
+            if msg.content:
+                content.append({'type': 'text', 'text': msg.content})
+
+            if msg.tool_calls:
+                for tool_call in msg.tool_calls:
+                    content.append({
+                        'type': 'tool_use',
+                        'id': tool_call['id'],
+                        'name': tool_call['tool_name'],
+                        'input': tool_call.get('arguments', {})
+                    })
+
+            if msg.role == 'tool':
+                formatted_messages.append({
+                    'role':
+                    'user',
+                    'content': [{
+                        'type': 'tool_result',
+                        'tool_use_id': msg.tool_call_id,
+                        'content': msg.content
+                    }]
+                })
+                continue
+
+            formatted_messages.append({'role': msg.role, 'content': content})
+        return formatted_messages
+
+    def _call_llm(self,
+                  messages: List[Message],
+                  tools: Optional[List[Dict]] = None,
+                  stream: bool = False,
+                  **kwargs) -> Any:
+
+        formatted_messages = self._format_input_message(messages)
+        formatted_messages = [m for m in formatted_messages if m['content']]
+
+        system = None
+        if formatted_messages[0]['role'] == 'system':
+            system = formatted_messages[0]['content']
+            formatted_messages = formatted_messages[1:]
+        params = {
+            'model': self.model,
+            'messages': formatted_messages,
+            'max_tokens': kwargs.pop('max_tokens', 1024),
+        }
+
+        if system:
+            params['system'] = system
+        if tools:
+            params['tools'] = tools
+        params.update(kwargs)
+
+        if stream:
+            return self.client.messages.stream(**params)
+        else:
+            return self.client.messages.create(**params)
+
+    @retry(max_attempts=3, delay=1.0)
+    def generate(self,
+                 messages: List[Message],
+                 tools: Optional[List[Tool]] = None,
+                 max_continue_runs: Optional[int] = None,
+                 **kwargs) -> Union[Message, Generator[Message, None, None]]:
+
+        formatted_tools = self.format_tools(tools)
+        args = self.args.copy()
+        args.update(kwargs)
+        stream = args.pop('stream', False)
+
+        sig_params = inspect.signature(self.client.messages.create).parameters
+        filtered_args = {k: v for k, v in args.items() if k in sig_params}
+
+        completion = self._call_llm(messages, formatted_tools, stream,
+                                    **filtered_args)
+
+        if stream:
+            return self._stream_format_output_message(completion)
+        else:
+            return self._format_output_message(completion)
+
+    def _stream_format_output_message(self,
+                                      stream_manager) -> Iterator[Message]:
+        current_message = Message(
+            role='assistant',
+            content='',
+            tool_calls=[],
+            id='',
+            completion_tokens=0,
+            prompt_tokens=0,
+            api_calls=1,
+            partial=True,
+        )
+        tool_call_id_map = {}  # index -> tool_call_id (用于去重 yield)
+        with stream_manager as stream:
+            for event in stream:
+                event_type = getattr(event, 'type')
+                if event_type == 'message_start':
+                    msg = event.message
+                    current_message.id = msg.id
+                    tool_call_id_map = {}
+                    yield current_message
+                elif event_type == 'text':
+                    current_message.content = event.snapshot
+                    yield current_message
+                elif event_type == 'message_stop':
+                    final_msg = getattr(event, 'message')
+                    full_content = ''
+                    used_tool_call_ids = set()
+                    for idx, block in enumerate(event.message.content):
+                        if block is None:
+                            continue
+                        if block.type == 'text':
+                            full_content += block.text
+                        elif block.type == 'tool_use':
+                            tool_call_id = tool_call_id_map.get(idx)
+                            tool_call = ToolCall(
+                                id=tool_call_id,
+                                index=len(current_message.tool_calls),
+                                type='function',
+                                tool_name=block.name,
+                                arguments=json5.dumps(block.input),
+                            )
+                            current_message.tool_calls.append(tool_call)
+                            used_tool_call_ids.add(tool_call_id)
+                    current_message.content = full_content
+                    current_message.partial = False
+                    current_message.completion_tokens = getattr(
+                        final_msg.usage, 'output_tokens',
+                        current_message.completion_tokens)
+                    current_message.prompt_tokens = getattr(
+                        final_msg.usage, 'input_tokens',
+                        current_message.prompt_tokens)
+
+                    yield current_message
+
+    @staticmethod
+    def _format_output_message(completion) -> Message:
+        """
+        Formats the full non-streaming response from Anthropic into a Message object.
+
+        Args:
+            completion: The raw response from the Anthropic API (e.g., a Message object from anthropic SDK).
+
+        Returns:
+            Message: A Message object containing the final response.
+        """
+        # Extract text content
+        content = ''
+        tool_calls = []
+
+        # Anthropic responses have a list of content blocks
+        for block in completion.content:
+            if block.type == 'text':
+                content += block.text
+            elif block.type == 'tool_use':
+                tool_calls.append(
+                    ToolCall(
+                        id=block.id,
+                        index=len(tool_calls),  # index based on appearance
+                        type=
+                        'function',  # or "tool_use" depending on your schema
+                        arguments=block.input,
+                        tool_name=block.name,
+                    ))
+
+        # Anthropic does not have a native "reasoning_content" field
+        reasoning_content = ''
+
+        return Message(
+            role='assistant',
+            content=content,
+            reasoning_content=reasoning_content,
+            tool_calls=tool_calls if tool_calls else None,
+            id=completion.id,
+            prompt_tokens=completion.usage.input_tokens,
+            completion_tokens=completion.usage.output_tokens,
+        )
+
+
+if __name__ == '__main__':
+    import os
+    config = {
+        'llm': {
+            'model': 'Qwen/Qwen2.5-VL-72B-Instruct',
+            'anthropic_api_key': os.getenv('MODELSCOPE_API_KEY'),
+            'anthropic_base_url': 'https://api-inference.modelscope.cn'
+        },
+        'generation_config': {
+            'stream': True,
+        }
+    }
+    tools = [{
+        'tool_name': 'get_weather',
+        'description': 'Get the current weather in a given location',
+        'parameters': {
+            'type': 'object',
+            'properties': {
+                'location': {
+                    'type': 'string',
+                    'description': 'City and state'
+                },
+                'unit': {
+                    'type': 'string',
+                    'enum': ['celsius', 'fahrenheit']
+                }
+            },
+            'required': ['location']
+        }
+    }]
+
+    messages = [Message(role='user', content='描述杭州，300字')]
+    # messages = [Message(role='user', content='去伦敦现在该带什么样的衣服？')]
+
+    llm = Anthropic(config=OmegaConf.create(config))
+    result = llm.generate(messages, tools=tools)
+    for chunk in result:
+        print(chunk)
diff --git a/ms_agent/llm/model_mapping.py b/ms_agent/llm/model_mapping.py
index e152591c5..97bba8a3b 100644
--- a/ms_agent/llm/model_mapping.py
+++ b/ms_agent/llm/model_mapping.py
@@ -1,8 +1,10 @@
 # Copyright (c) Alibaba, Inc. and its affiliates.
+from ms_agent.llm.anthropic_llm import Anthropic
 from ms_agent.llm.modelscope_llm import ModelScope
 from ms_agent.llm.openai_llm import OpenAI
 
 all_services_mapping = {
     'modelscope': ModelScope,
     'openai': OpenAI,
+    'anthropic': Anthropic,
 }
diff --git a/ms_agent/llm/openai_llm.py b/ms_agent/llm/openai_llm.py
index 4a483af69..20a33cf1e 100644
--- a/ms_agent/llm/openai_llm.py
+++ b/ms_agent/llm/openai_llm.py
@@ -5,15 +5,14 @@
 
 from ms_agent.llm import LLM
 from ms_agent.llm.utils import Message, Tool, ToolCall
-from ms_agent.utils import assert_package_exist, get_logger, retry
+from ms_agent.utils import (MAX_CONTINUE_RUNS, assert_package_exist,
+                            get_logger, retry)
 from omegaconf import DictConfig, OmegaConf
 from openai.types.chat.chat_completion_message_tool_call import (
     ChatCompletionMessageToolCall, Function)
 
 logger = get_logger()
 
-MAX_CONTINUE_RUNS = 3
-
 
 class OpenAI(LLM):
     """Base Class for OpenAI SDK LLMs.
diff --git a/ms_agent/utils/__init__.py b/ms_agent/utils/__init__.py
index 927fac93c..648137072 100644
--- a/ms_agent/utils/__init__.py
+++ b/ms_agent/utils/__init__.py
@@ -2,3 +2,5 @@
 from .llm_utils import async_retry, retry
 from .logger import get_logger
 from .utils import assert_package_exist, enhance_error, strtobool
+
+MAX_CONTINUE_RUNS = 3
diff --git a/tests/llm/test_anthropic.py b/tests/llm/test_anthropic.py
new file mode 100644
index 000000000..61f0372fe
--- /dev/null
+++ b/tests/llm/test_anthropic.py
@@ -0,0 +1,150 @@
+# Copyright (c) Alibaba, Inc. and its affiliates.
+import os
+import unittest
+
+from ms_agent.agent.llm_agent import LLMAgent
+from ms_agent.llm.anthropic_llm import Anthropic
+from ms_agent.llm.utils import Message, Tool
+from omegaconf import DictConfig, OmegaConf
+
+from modelscope.utils.test_utils import test_level
+
+API_CALL_MAX_TOKEN = 50
+
+
+class OpenaiLLM(unittest.TestCase):
+    conf: DictConfig = OmegaConf.create({
+        'llm': {
+            'model': 'Qwen/Qwen2.5-VL-72B-Instruct',
+            'anthropic_api_key': os.getenv('MODELSCOPE_API_KEY'),
+            'anthropic_base_url': 'https://api-inference.modelscope.cn',
+            'service': 'anthropic'
+        },
+        'generation_config': {
+            'stream': False,
+            'extra_body': {
+                'enable_thinking': False
+            },
+            'max_tokens': API_CALL_MAX_TOKEN
+        }
+    })
+    messages = [
+        Message(role='assistant', content='You are a helpful assistant.'),
+        Message(role='user', content='浙江的省会是哪里？'),
+    ]
+    tool_messages = [
+        Message(role='assistant', content='You are a helpful assistant.'),
+        Message(role='user', content='经度：116.4074，纬度：39.9042是什么地方'),
+    ]
+    continue_messages = [
+        Message(role='assistant', content='You are a helpful assistant.'),
+        Message(role='user', content='写一篇介绍杭州的短文，200字左右。'),
+    ]
+
+    tools = [
+        Tool(
+            server_name='amap-maps',
+            tool_name='maps_regeocode',
+            description='将一个高德经纬度坐标转换为行政区划地址信息',
+            parameters={
+                'type': 'object',
+                'properties': {
+                    'location': {
+                        'type': 'string',
+                        'description': '经纬度'
+                    }
+                },
+                'required': ['location']
+            }),
+        Tool(
+            tool_name='mkdir',
+            description='在文件系统创建目录',
+            parameters={
+                'type': 'object',
+                'properties': {
+                    'dir_name': {
+                        'type': 'string',
+                        'description': '目录名'
+                    }
+                },
+                'required': ['dir_name']
+            })
+    ]
+
+    @unittest.skipUnless(test_level() >= 0, 'skip test in current test level')
+    def test_call_no_stream(self):
+        llm = Anthropic(self.conf)
+        res = llm.generate(messages=self.messages, tools=None)
+        print(res)
+        assert (res.content)
+
+    @unittest.skipUnless(test_level() >= 0, 'skip test in current test level')
+    def test_call_stream(self):
+        llm = Anthropic(self.conf)
+        res = llm.generate(messages=self.messages, tools=None, stream=True)
+        for chunk in res:
+            print(chunk)
+        assert (len(chunk.content))
+
+    @unittest.skipUnless(test_level() >= 0, 'skip test in current test level')
+    def test_tool_stream(self):
+        llm = Anthropic(self.conf)
+        res = llm.generate(
+            messages=self.tool_messages, tools=self.tools, stream=True)
+        for chunk in res:
+            print(chunk)
+        assert (len(chunk.tool_calls))
+
+    @unittest.skipUnless(test_level() >= 0, 'skip test in current test level')
+    def test_tool_no_stream(self):
+        llm = Anthropic(self.conf)
+        res = llm.generate(messages=self.tool_messages, tools=self.tools)
+        print(res)
+        assert (len(res.tool_calls))
+
+    @unittest.skipUnless(test_level() >= 0, 'skip test in current test level')
+    def test_agent_multi_round(self):
+        import asyncio
+
+        async def main():
+            mcp_config = {
+                'mcpServers': {
+                    'fetch': {
+                        'type': 'sse',
+                        'url': os.getenv('MCP_SERVER_FETCH_URL'),
+                    }
+                }
+            }
+            agent = LLMAgent(config=self.conf, mcp_config=mcp_config)
+            res = await agent.run('访问www.baidu.com')
+            print(res)
+            assert ('robots.txt' in res[-1].content)
+
+        asyncio.run(main())
+
+    @unittest.skipUnless(test_level() >= 0, 'skip test in current test level')
+    def test_stream_agent_multi_round(self):
+        import asyncio
+        from copy import deepcopy
+
+        async def main():
+            mcp_config = {
+                'mcpServers': {
+                    'fetch': {
+                        'type': 'sse',
+                        'url': os.getenv('MCP_SERVER_FETCH_URL'),
+                    }
+                }
+            }
+            conf2 = deepcopy(self.conf)
+            conf2.generation_config.stream = True
+            agent = LLMAgent(config=self.conf, mcp_config=mcp_config)
+            res = await agent.run('访问www.baidu.com')
+            print('res:', res)
+            assert ('robots.txt' in res[-1].content)
+
+        asyncio.run(main())
+
+
+if __name__ == '__main__':
+    unittest.main()