diff --git a/src/llamafactory/api/chat.py b/src/llamafactory/api/chat.py
index 05db57a7..c467a3e6 100644
--- a/src/llamafactory/api/chat.py
+++ b/src/llamafactory/api/chat.py
@@ -168,7 +168,7 @@ async def create_chat_completion_response(
         if isinstance(result, list):
             tool_calls = []
             for tool in result:
-                function = Function(name=tool[0], arguments=tool[1])
+                function = Function(name=tool.name, arguments=tool.arguments)
                 tool_calls.append(FunctionCall(id=f"call_{uuid.uuid4().hex}", function=function))
 
             response_message = ChatCompletionMessage(role=Role.ASSISTANT, tool_calls=tool_calls)
diff --git a/src/llamafactory/data/formatter.py b/src/llamafactory/data/formatter.py
index 28bf3fb1..f6c24468 100644
--- a/src/llamafactory/data/formatter.py
+++ b/src/llamafactory/data/formatter.py
@@ -16,16 +16,12 @@ import json
 import re
 from abc import ABC, abstractmethod
 from dataclasses import dataclass, field
-from typing import TYPE_CHECKING, List, Optional, Tuple, Union
+from typing import List, Optional, Union
 
 from typing_extensions import override
 
 from .data_utils import SLOTS
-from .tool_utils import get_tool_utils
-
-
-if TYPE_CHECKING:
-    from .tool_utils import FunctionCall
+from .tool_utils import FunctionCall, get_tool_utils
 
 
 @dataclass
@@ -98,19 +94,21 @@ class StringFormatter(Formatter):
 @dataclass
 class FunctionFormatter(Formatter):
     def __post_init__(self):
-        self.function_slots = get_tool_utils(self.tool_format).get_function_slots()
+        self.tool_utils = get_tool_utils(self.tool_format)
 
     @override
     def apply(self, **kwargs) -> SLOTS:
         content = kwargs.pop("content")
-        functions: List[Tuple[str, str]] = []
+        functions: List["FunctionCall"] = []
         try:
             tool_calls = json.loads(content)
             if not isinstance(tool_calls, list):  # parallel function call
                 tool_calls = [tool_calls]
 
             for tool_call in tool_calls:
-                functions.append((tool_call["name"], json.dumps(tool_call["arguments"], ensure_ascii=False)))
+                functions.append(
+                    FunctionCall(tool_call["name"], json.dumps(tool_call["arguments"], ensure_ascii=False))
+                )
 
         except json.JSONDecodeError:
             raise RuntimeError(f"Invalid JSON format in function message: {str([content])}")  # flat string
@@ -118,15 +116,7 @@ class FunctionFormatter(Formatter):
         elements = []
         for slot in self.slots:
             if slot == "{{content}}":
-                for name, arguments in functions:
-                    for slot in self.function_slots:
-                        if isinstance(slot, str):
-                            slot = slot.replace("{{name}}", name).replace("{{arguments}}", arguments)
-                            elements.append(slot)
-                        elif isinstance(slot, (dict, set)):
-                            elements.append(slot)
-                        else:
-                            raise RuntimeError(f"Input must be string, set[str] or dict[str, str], got {type(slot)}")
+                elements += self.tool_utils.function_formatter(functions)
             else:
                 elements.append(slot)
 
diff --git a/src/llamafactory/data/template.py b/src/llamafactory/data/template.py
index cfc4a2cb..3297be39 100644
--- a/src/llamafactory/data/template.py
+++ b/src/llamafactory/data/template.py
@@ -30,6 +30,7 @@ if TYPE_CHECKING:
     from ..hparams import DataArguments
     from .formatter import SLOTS, Formatter
     from .mm_plugin import BasePlugin
+    from .tool_utils import FunctionCall
 
 
 logger = logging.get_logger(__name__)
@@ -83,7 +84,7 @@ class Template:
         encoded_messages = self._encode(tokenizer, messages, system, tools)
         return [(encoded_messages[i], encoded_messages[i + 1]) for i in range(0, len(encoded_messages), 2)]
 
-    def extract_tool(self, content: str) -> Union[str, List[Tuple[str, str]]]:
+    def extract_tool(self, content: str) -> Union[str, List["FunctionCall"]]:
         r"""
         Extracts tool message.
         """
@@ -244,7 +245,7 @@ def _register_template(
     )
     ```
     """
-    template_class = Llama2Template if name.startswith("llama2") else Template
+    template_class = Llama2Template if any(k in name for k in ("llama2", "mistral")) else Template
     default_slots = ["{{content}}"] if efficient_eos else ["{{content}}", {"eos_token"}]
     default_user_formatter = StringFormatter(slots=["{{content}}"])
     default_assistant_formatter = StringFormatter(slots=default_slots)
@@ -854,7 +855,11 @@ _register_template(
 # copied from mistral template
 _register_template(
     name="llava_next_mistral",
-    format_user=StringFormatter(slots=["[INST] {{content}} [/INST]"]),
+    format_user=StringFormatter(slots=["[INST] {{content}}[/INST]"]),
+    format_assistant=StringFormatter(slots=[" {{content}}", {"eos_token"}]),
+    format_function=FunctionFormatter(slots=["[TOOL_CALLS] ", "{{content}}", {"eos_token"}], tool_format="mistral"),
+    format_observation=StringFormatter(slots=["""[TOOL_RESULTS] {"content": {{content}}}[/TOOL_RESULTS]"""]),
+    format_tools=ToolFormatter(tool_format="mistral"),
     format_prefix=EmptyFormatter(slots=[{"bos_token"}]),
     mm_plugin=get_mm_plugin(name="llava_next", image_token="<image>"),
 )
@@ -902,7 +907,11 @@ _register_template(
 # copied from mistral template
 _register_template(
     name="llava_next_video_mistral",
-    format_user=StringFormatter(slots=["[INST] {{content}} [/INST]"]),
+    format_user=StringFormatter(slots=["[INST] {{content}}[/INST]"]),
+    format_assistant=StringFormatter(slots=[" {{content}}", {"eos_token"}]),
+    format_function=FunctionFormatter(slots=["[TOOL_CALLS] ", "{{content}}", {"eos_token"}], tool_format="mistral"),
+    format_observation=StringFormatter(slots=["""[TOOL_RESULTS] {"content": {{content}}}[/TOOL_RESULTS]"""]),
+    format_tools=ToolFormatter(tool_format="mistral"),
     format_prefix=EmptyFormatter(slots=[{"bos_token"}]),
     mm_plugin=get_mm_plugin(name="llava_next_video", image_token="<image>", video_token="<video>"),
 )
@@ -939,7 +948,11 @@ _register_template(
 
 _register_template(
     name="mistral",
-    format_user=StringFormatter(slots=["[INST] {{content}} [/INST]"]),
+    format_user=StringFormatter(slots=["[INST] {{content}}[/INST]"]),
+    format_assistant=StringFormatter(slots=[" {{content}}", {"eos_token"}]),
+    format_function=FunctionFormatter(slots=["[TOOL_CALLS] ", "{{content}}", {"eos_token"}], tool_format="mistral"),
+    format_observation=StringFormatter(slots=["""[TOOL_RESULTS] {"content": {{content}}}[/TOOL_RESULTS]"""]),
+    format_tools=ToolFormatter(tool_format="mistral"),
     format_prefix=EmptyFormatter(slots=[{"bos_token"}]),
 )
 
diff --git a/src/llamafactory/data/tool_utils.py b/src/llamafactory/data/tool_utils.py
index 7c58dfc1..6be48767 100644
--- a/src/llamafactory/data/tool_utils.py
+++ b/src/llamafactory/data/tool_utils.py
@@ -15,17 +15,18 @@
 import json
 import re
 from abc import ABC, abstractmethod
-from collections import namedtuple
 from dataclasses import dataclass
 from datetime import datetime
-from typing import Any, Dict, List, Tuple, Union
+from typing import Any, Dict, List, NamedTuple, Tuple, Union
 
 from typing_extensions import override
 
 from .data_utils import SLOTS
 
 
-FunctionCall = namedtuple("FunctionCall", ["name", "arguments"])
+class FunctionCall(NamedTuple):
+    name: str
+    arguments: str
 
 
 DEFAULT_TOOL_PROMPT = (
@@ -38,13 +39,11 @@ DEFAULT_TOOL_PROMPT = (
     "```\n"
 )
 
-
 GLM4_TOOL_PROMPT = (
     "你是一个名为 ChatGLM 的人工智能助手。你是基于智谱AI训练的语言模型 GLM-4 模型开发的，"
     "你的任务是针对用户的问题和要求提供适当的答复和支持。# 可用工具{tool_text}"
 )
 
-
 LLAMA3_TOOL_PROMPT = (
     "Cutting Knowledge Date: December 2023\nToday Date: {date}\n\n"
     "You have access to the following functions. To call a function, please respond with JSON for a function call. "
@@ -59,14 +58,6 @@ class ToolUtils(ABC):
     Base class for tool utilities.
     """
 
-    @staticmethod
-    @abstractmethod
-    def get_function_slots() -> SLOTS:
-        r"""
-        Gets a list of slots corresponding to a single function call.
-        """
-        ...
-
     @staticmethod
     @abstractmethod
     def tool_formatter(tools: List[Dict[str, Any]]) -> str:
@@ -75,21 +66,24 @@ class ToolUtils(ABC):
         """
         ...
 
+    @staticmethod
+    @abstractmethod
+    def function_formatter(functions: List["FunctionCall"]) -> SLOTS:
+        r"""
+        Generates the assistant message including all the tool calls.
+        """
+        ...
+
     @staticmethod
     @abstractmethod
     def tool_extractor(content: str) -> Union[str, List["FunctionCall"]]:
         r"""
-        Extracts all the function calls from the response message.
+        Extracts all the function calls from the assistant message.
         """
         ...
 
 
 class DefaultToolUtils(ToolUtils):
-    @override
-    @staticmethod
-    def get_function_slots() -> SLOTS:
-        return ["Action: {{name}}\nAction Input: {{arguments}}\n"]
-
     @override
     @staticmethod
     def tool_formatter(tools: List[Dict[str, Any]]) -> str:
@@ -124,6 +118,15 @@ class DefaultToolUtils(ToolUtils):
 
         return DEFAULT_TOOL_PROMPT.format(tool_text=tool_text, tool_names=", ".join(tool_names))
 
+    @override
+    @staticmethod
+    def function_formatter(functions: List["FunctionCall"]) -> SLOTS:
+        function_text = ""
+        for name, arguments in functions:
+            function_text += f"Action: {name}\nAction Input: {arguments}\n"
+
+        return [function_text]
+
     @override
     @staticmethod
     def tool_extractor(content: str) -> Union[str, List["FunctionCall"]]:
@@ -138,7 +141,7 @@ class DefaultToolUtils(ToolUtils):
             tool_input = match[1].strip().strip('"').strip("```")
             try:
                 arguments = json.loads(tool_input)
-                results.append((tool_name, json.dumps(arguments, ensure_ascii=False)))
+                results.append(FunctionCall(tool_name, json.dumps(arguments, ensure_ascii=False)))
             except json.JSONDecodeError:
                 return content
 
@@ -146,11 +149,6 @@ class DefaultToolUtils(ToolUtils):
 
 
 class GLM4ToolUtils(ToolUtils):
-    @override
-    @staticmethod
-    def get_function_slots() -> SLOTS:
-        return ["{{name}}\n{{arguments}}"]
-
     @override
     @staticmethod
     def tool_formatter(tools: List[Dict[str, Any]]) -> str:
@@ -162,6 +160,14 @@ class GLM4ToolUtils(ToolUtils):
 
         return GLM4_TOOL_PROMPT.format(tool_text=tool_text)
 
+    @override
+    @staticmethod
+    def function_formatter(functions: List["FunctionCall"]) -> SLOTS:
+        if len(functions) > 1:
+            raise ValueError("GLM-4 does not support parallel functions.")
+
+        return [f"{functions[0].name}\n{functions[0].arguments}"]
+
     @override
     @staticmethod
     def tool_extractor(content: str) -> Union[str, List["FunctionCall"]]:
@@ -174,7 +180,7 @@ class GLM4ToolUtils(ToolUtils):
         except json.JSONDecodeError:
             return content
 
-        return [(tool_name, json.dumps(arguments, ensure_ascii=False))]
+        return [FunctionCall(tool_name, json.dumps(arguments, ensure_ascii=False))]
 
 
 class Llama3ToolUtils(ToolUtils):
@@ -184,11 +190,6 @@ class Llama3ToolUtils(ToolUtils):
     Reference: https://www.llama.com/docs/model-cards-and-prompt-formats/llama3_1/#json-based-tool-calling
     """
 
-    @override
-    @staticmethod
-    def get_function_slots() -> SLOTS:
-        return ["""{"name": "{{name}}", "parameters": {{arguments}}}"""]
-
     @override
     @staticmethod
     def tool_formatter(tools: List[Dict[str, Any]]) -> str:
@@ -200,6 +201,14 @@ class Llama3ToolUtils(ToolUtils):
 
         return LLAMA3_TOOL_PROMPT.format(date=date, tool_text=tool_text)
 
+    @override
+    @staticmethod
+    def function_formatter(functions: List["FunctionCall"]) -> SLOTS:
+        if len(functions) > 1:
+            raise ValueError("Llama 3 does not support parallel functions.")
+
+        return [f'{{"name": "{functions[0].name}", "parameters": {functions[0].arguments}}}']
+
     @override
     @staticmethod
     def tool_extractor(content: str) -> Union[str, List["FunctionCall"]]:
@@ -211,13 +220,54 @@ class Llama3ToolUtils(ToolUtils):
         if "name" not in tool or "parameters" not in tool:
             return content
 
-        return [(tool["name"], json.dumps(tool["parameters"], ensure_ascii=False))]
+        return [FunctionCall(tool["name"], json.dumps(tool["parameters"], ensure_ascii=False))]
+
+
+class MistralToolUtils(ToolUtils):
+    @override
+    @staticmethod
+    def tool_formatter(tools: List[Dict[str, Any]]) -> str:
+        wrapped_tools = []
+        for tool in tools:
+            wrapped_tools.append({"type": "function", "function": tool})
+
+        return "[AVAILABLE_TOOLS] " + json.dumps(wrapped_tools, ensure_ascii=False) + "[/AVAILABLE_TOOLS]"
+
+    @override
+    @staticmethod
+    def function_formatter(functions: List["FunctionCall"]) -> SLOTS:
+        function_texts = []
+        for name, arguments in functions:
+            function_texts.append(f'{{"name": "{name}", "arguments": {arguments}}}')
+
+        return ["[" + ", ".join(function_texts) + "]"]
+
+    @override
+    @staticmethod
+    def tool_extractor(content: str) -> Union[str, List["FunctionCall"]]:
+        try:
+            tools = json.loads(content.strip())
+        except json.JSONDecodeError:
+            return content
+
+        if not isinstance(tools, list):
+            tools = [tools]
+
+        results = []
+        for tool in tools:
+            if "name" not in tool or "arguments" not in tool:
+                return content
+
+            results.append(FunctionCall(tool["name"], json.dumps(tool["arguments"], ensure_ascii=False)))
+
+        return results
 
 
 TOOLS = {
     "default": DefaultToolUtils(),
     "glm4": GLM4ToolUtils(),
     "llama3": Llama3ToolUtils(),
+    "mistral": MistralToolUtils(),
 }
 
 
diff --git a/src/llamafactory/webui/chatter.py b/src/llamafactory/webui/chatter.py
index 1934a1a7..c18955cf 100644
--- a/src/llamafactory/webui/chatter.py
+++ b/src/llamafactory/webui/chatter.py
@@ -157,7 +157,7 @@ class WebChatModel(ChatModel):
                 result = response
 
             if isinstance(result, list):
-                tool_calls = [{"name": tool[0], "arguments": json.loads(tool[1])} for tool in result]
+                tool_calls = [{"name": tool.name, "arguments": json.loads(tool.arguments)} for tool in result]
                 tool_calls = json.dumps(tool_calls, indent=4, ensure_ascii=False)
                 output_messages = messages + [{"role": Role.FUNCTION.value, "content": tool_calls}]
                 bot_text = "```json\n" + tool_calls + "\n```"
diff --git a/tests/data/test_formatter.py b/tests/data/test_formatter.py
index 6543a71a..c3865a85 100644
--- a/tests/data/test_formatter.py
+++ b/tests/data/test_formatter.py
@@ -59,7 +59,7 @@ def test_multi_function_formatter():
     formatter = FunctionFormatter(slots=["{{content}}", "</s>"], tool_format="default")
     tool_calls = json.dumps([FUNCTION] * 2)
     assert formatter.apply(content=tool_calls) == [
-        """Action: tool_name\nAction Input: {"foo": "bar", "size": 10}\n""",
+        """Action: tool_name\nAction Input: {"foo": "bar", "size": 10}\n"""
         """Action: tool_name\nAction Input: {"foo": "bar", "size": 10}\n""",
         "</s>",
     ]
@@ -112,7 +112,7 @@ def test_glm4_tool_formatter():
     assert formatter.apply(content=json.dumps(TOOLS)) == [
         "你是一个名为 ChatGLM 的人工智能助手。你是基于智谱AI训练的语言模型 GLM-4 模型开发的，"
         "你的任务是针对用户的问题和要求提供适当的答复和支持。# 可用工具\n\n"
-        f"## test_tool\n\n{json.dumps(TOOLS[0], indent=4)}\n在调用上述函数时，请使用 Json 格式表示调用的参数。"
+        f"## test_tool\n\n{json.dumps(TOOLS[0], indent=4, ensure_ascii=False)}\n在调用上述函数时，请使用 Json 格式表示调用的参数。"
     ]
 
 
@@ -139,7 +139,7 @@ def test_llama3_tool_formatter():
         f"Cutting Knowledge Date: December 2023\nToday Date: {date}\n\n"
         "You have access to the following functions. To call a function, please respond with JSON for a function call. "
         """Respond in the format {"name": function name, "parameters": dictionary of argument name and its value}. """
-        f"Do not use variables.\n\n{json.dumps(wrapped_tool, indent=4)}\n\n"
+        f"Do not use variables.\n\n{json.dumps(wrapped_tool, indent=4, ensure_ascii=False)}\n\n"
     ]
 
 
@@ -147,3 +147,50 @@ def test_llama3_tool_extractor():
     formatter = ToolFormatter(tool_format="llama3")
     result = """{"name": "test_tool", "parameters": {"foo": "bar", "size": 10}}\n"""
     assert formatter.extract(result) == [("test_tool", """{"foo": "bar", "size": 10}""")]
+
+
+def test_mistral_function_formatter():
+    formatter = FunctionFormatter(slots=["[TOOL_CALLS] ", "{{content}}", "</s>"], tool_format="mistral")
+    tool_calls = json.dumps(FUNCTION)
+    assert formatter.apply(content=tool_calls) == [
+        "[TOOL_CALLS] ",
+        """[{"name": "tool_name", "arguments": {"foo": "bar", "size": 10}}]""",
+        "</s>",
+    ]
+
+
+def test_mistral_multi_function_formatter():
+    formatter = FunctionFormatter(slots=["[TOOL_CALLS] ", "{{content}}", "</s>"], tool_format="mistral")
+    tool_calls = json.dumps([FUNCTION] * 2)
+    assert formatter.apply(content=tool_calls) == [
+        "[TOOL_CALLS] ",
+        """[{"name": "tool_name", "arguments": {"foo": "bar", "size": 10}}, """
+        """{"name": "tool_name", "arguments": {"foo": "bar", "size": 10}}]""",
+        "</s>",
+    ]
+
+
+def test_mistral_tool_formatter():
+    formatter = ToolFormatter(tool_format="mistral")
+    wrapped_tool = {"type": "function", "function": TOOLS[0]}
+    assert formatter.apply(content=json.dumps(TOOLS)) == [
+        "[AVAILABLE_TOOLS] " + json.dumps([wrapped_tool], ensure_ascii=False) + "[/AVAILABLE_TOOLS]"
+    ]
+
+
+def test_mistral_tool_extractor():
+    formatter = ToolFormatter(tool_format="mistral")
+    result = """{"name": "test_tool", "arguments": {"foo": "bar", "size": 10}}"""
+    assert formatter.extract(result) == [("test_tool", """{"foo": "bar", "size": 10}""")]
+
+
+def test_mistral_multi_tool_extractor():
+    formatter = ToolFormatter(tool_format="mistral")
+    result = (
+        """[{"name": "test_tool", "arguments": {"foo": "bar", "size": 10}}, """
+        """{"name": "another_tool", "arguments": {"foo": "job", "size": 2}}]"""
+    )
+    assert formatter.extract(result) == [
+        ("test_tool", """{"foo": "bar", "size": 10}"""),
+        ("another_tool", """{"foo": "job", "size": 2}"""),
+    ]