diff --git a/documents/README_OPENROUTER.md b/documents/README_OPENROUTER.md
index da2cbea..27c8307 100644
--- a/documents/README_OPENROUTER.md
+++ b/documents/README_OPENROUTER.md
@@ -1,7 +1,6 @@
 # OpenRouter: Free Open-Source LLMs API
 
-
-OpenRouter offers free access to various open-source Large Language Models (LLMs), allowing you to explore and experiment with these powerful models without incurring any charges.
+OpenRouter offers free access to various open-source Large Language Models (LLMs), allowing you to explore and experiment with these powerful models without incurring any charges. After contacting Open Route via Discord, they have confirmed that there are no plans to switch the free models to paid ones for the time being. (2024-04)
 
 > [!IMPORTANT]
 > The free models may be temporary and subject to change based on policies. Please refer to the following page to check the available free models: [Open Router Models](https://openrouter.ai/docs#models) (Free limit: 10 requests/minute)
@@ -132,6 +131,74 @@ response = toppy_client.create_chat_completion(prompt)
 print(response)
 ```
 
+
+<br><br><br>
+
+# OpenRouter Async API Client
+
+For the Gemini API, due to issues like rate limiting and blocking, sync objects are preferred over async, as async can be easily neutralized. However, since OpenRouter reliably provides open-source LLMs, you can use the asynchronous implementation as follows.
+
+The `OpenRouter` class is designed to manage API interactions with OpenRouter for creating chat completions using AI models asynchronously. This class utilizes `aiohttp` for asynchronous network calls.
+
+## Features
+
+- **Asynchronous API Calls**: Makes use of Python's `asyncio` and `aiohttp` to perform asynchronous API calls.
+- **Concurrent Completions**: Ability to handle multiple chat completions concurrently.
+- **Error Handling**: Basic error handling for API keys and message formatting.
+
+
+## Class Usage
+
+### Initialization
+
+Initialize an instance of `OpenRouter` with your model identifier and API key:
+
+```python
+from open_router_async import OpenRouter
+
+api_key = 'your_api_key_here'
+model = 'google/gemma-7b-it:free'
+router = OpenRouter(model, api_key)
+```
+
+### Single Chat Completion
+
+To generate a single chat completion asynchronously:
+
+```python
+import asyncio
+
+async def main():
+    completion = await router.create_chat_completion("Hello, how can I help you today?")
+    print(completion)
+
+if __name__ == "__main__":
+    asyncio.run(main())
+```
+
+### Multiple Chat Completions
+
+To handle multiple chat completions concurrently:
+
+```python
+import asyncio
+
+async def main():
+    messages = [
+        "Hello, how can I help you today?",
+        "What is the weather like today?",
+        "Can you recommend some books?"
+    ]
+    completions = await router.create_multi_chat_completions(messages)
+    for completion in completions:
+        print(completion)
+
+if __name__ == "__main__":
+    asyncio.run(main())
+```
+
+This README provides a basic guide to setting up and using the `OpenRouter` class, including how to send asynchronous requests for single and multiple chat completions. You can include this README file in your project directory to help users understand and use your asynchronous API client effectively.
+
 ### More Examples
 
 Check out the [OpenRouter documentation](https://openrouter.ai/docs) for more examples and usage details for the other available free models.
diff --git a/gemini/src/modules/openrouter/__init__.py b/gemini/src/modules/openrouter/__init__.py
index 76e593e..0aa1c16 100644
--- a/gemini/src/modules/openrouter/__init__.py
+++ b/gemini/src/modules/openrouter/__init__.py
@@ -1 +1,3 @@
 from .client import OpenRouter
+from .async_client import AsyncOpenRouter
+from .const import FreeModel
diff --git a/gemini/src/modules/openrouter/async_client.py b/gemini/src/modules/openrouter/async_client.py
new file mode 100644
index 0000000..e1cb53a
--- /dev/null
+++ b/gemini/src/modules/openrouter/async_client.py
@@ -0,0 +1,93 @@
+import aiohttp
+import asyncio
+from const import FreeModel
+from typing import List, Optional
+
+
+class AsyncOpenRouter:
+    """
+    Manages API interactions with OpenRouter for creating chat completions using AI models asynchronously.
+
+    Attributes and methods are analogous to the synchronous version but adapted for async operation.
+    """
+
+    def __init__(self, model: str, api_key: str) -> None:
+        if not api_key:
+            raise ValueError(
+                "API key required. Please visit https://openrouter.ai/keys"
+            )
+        self.api_key = api_key
+        self.model = model
+        self._validate_model(model)
+
+    def get_model_list(self) -> List[str]:
+        return self.FREE_MODEL_LIST
+
+    async def create_chat_completion(
+        self,
+        message: str,
+        site_url: Optional[str] = None,
+        app_name: Optional[str] = None,
+    ) -> str:
+        response = await self.generate_content(message, site_url, app_name)
+        return response["choices"][0]["message"]["content"]
+
+    async def create_multi_chat_completions(
+        self,
+        messages: List[str],
+        site_url: Optional[str] = None,
+        app_name: Optional[str] = None,
+    ) -> List[str]:
+        tasks = [
+            self.create_chat_completion(message, site_url, app_name)
+            for message in messages
+        ]
+        results = await asyncio.gather(*tasks)
+        return results
+
+    async def generate_content(
+        self,
+        message: str,
+        site_url: Optional[str] = None,
+        app_name: Optional[str] = None,
+    ) -> dict:
+        self._validate_message(message)
+        self._validate_model(self.model)
+
+        headers = {
+            "Authorization": f"Bearer {self.api_key}",
+            "Content-Type": "application/json",
+        }
+        if site_url:
+            headers["HTTP-Referer"] = site_url
+        if app_name:
+            headers["X-Title"] = app_name
+
+        data = {
+            "model": self.model,
+            "messages": [
+                {"role": "user", "content": message},
+            ],
+        }
+
+        async with aiohttp.ClientSession() as session:
+            async with session.post(
+                "https://openrouter.ai/api/v1/chat/completions",
+                headers=headers,
+                json=data,
+            ) as response:
+                response.raise_for_status()
+                return await response.json()
+
+    def _validate_message(self, message: str) -> None:
+        if not isinstance(message, str):
+            raise ValueError("Message must be a string")
+
+    def _validate_model(self, model: str) -> None:
+        """
+        Checks if the specified model is in the list of free models.
+        """
+        if model not in FreeModel:
+            print(
+                "This model may not be free. Please check the following list for costs.\nUsers are responsible for API costs. Visit https://openrouter.ai/docs#models"
+            )
diff --git a/gemini/src/modules/openrouter/client.py b/gemini/src/modules/openrouter/client.py
index 22620f0..21e488d 100644
--- a/gemini/src/modules/openrouter/client.py
+++ b/gemini/src/modules/openrouter/client.py
@@ -1,4 +1,5 @@
 import requests
+from const import FreeModel
 from typing import List, Optional
 from requests.models import Response
 
@@ -22,17 +23,6 @@ class OpenRouter:
         ValueError: If an API key is not provided or if the message format is incorrect.
     """
 
-    FREE_MODEL_LIST: List[str] = [
-        "google/gemma-7b-it:free",
-        "huggingfaceh4/zephyr-7b-beta:free",
-        "mistralai/mistral-7b-instruct:free",
-        "openrouter/cinematika-7b:free",
-        "undi95/toppy-m-7b:free",
-        "gryphe/mythomist-7b:free",
-        "nousresearch/nous-capybara-7b:free",
-        "openchat/openchat-7b:free",
-    ]
-
     def __init__(self, model: str, api_key: str) -> None:
         """
         Initializes the OpenRouter instance with a specified model and API key.
@@ -132,7 +122,7 @@ def _validate_model(self, model: str) -> None:
         """
         Checks if the specified model is in the list of free models.
         """
-        if model not in self.FREE_MODEL_LIST:
+        if model not in FreeModel:
             print(
                 "This model may not be free. Please check the following list for costs.\nUsers are responsible for API costs. Visit https://openrouter.ai/docs#models"
             )
diff --git a/gemini/src/modules/openrouter/const.py b/gemini/src/modules/openrouter/const.py
new file mode 100644
index 0000000..c46c2fa
--- /dev/null
+++ b/gemini/src/modules/openrouter/const.py
@@ -0,0 +1,12 @@
+from enum import Enum
+
+
+class FreeModel(Enum):
+    GEMMA_7B = "google/gemma-7b-it:free"
+    ZEPHYR_7B = "huggingfaceh4/zephyr-7b-beta:free"
+    MISTRAL_7B = "mistralai/mistral-7b-instruct:free"
+    CINEMATIKA_7B = "openrouter/cinematika-7b:free"
+    TOPPY_M_7B = "undi95/toppy-m-7b:free"
+    MYTHOMIST_7B = "gryphe/mythomist-7b:free"
+    CAPYBARA_7B = "nousresearch/nous-capybara-7b:free"
+    OPENCHAT_7B = "openchat/openchat-7b:free"