diff --git a/docs/components/llms.mdx b/docs/components/llms.mdx
index e113e959..2c27228a 100644
--- a/docs/components/llms.mdx
+++ b/docs/components/llms.mdx
@@ -42,6 +42,17 @@ config = {
     }
 }
 
+# Use Openrouter by passing it's api key
+# os.environ["OPENROUTER_API_KEY"] = "your-api-key"
+# config = {
+#    "llm": {
+#        "provider": "openai",
+#        "config": {
+#            "model": "meta-llama/llama-3.1-70b-instruct",
+#        }
+#    }
+# }
+
 m = Memory.from_config(config)
 m.add("Likes to play cricket on weekends", user_id="alice", metadata={"category": "hobbies"})
 ```
diff --git a/mem0/configs/llms/base.py b/mem0/configs/llms/base.py
index 02974402..103c247d 100644
--- a/mem0/configs/llms/base.py
+++ b/mem0/configs/llms/base.py
@@ -11,10 +11,18 @@ class BaseLlmConfig(ABC):
         model: Optional[str] = None,
         temperature: float = 0,
         max_tokens: int = 3000,
-        top_p: float = 1,
+        top_p: float = 0,
+        top_k: int = 1,
+
+        # Openrouter specific
+        models: Optional[list[str]] = None,
+        route: Optional[str] = "fallback",
+        openrouter_base_url: Optional[str] = "https://openrouter.ai/api/v1",
+        site_url: Optional[str] = None,
+        app_name: Optional[str] = None,
 
         # Ollama specific
-        base_url: Optional[str] = None
+        ollama_base_url: Optional[str] = None
     ):
         """
         Initializes a configuration class instance for the LLM.
@@ -29,14 +37,34 @@ class BaseLlmConfig(ABC):
         :param top_p: Controls the diversity of words. Higher values (closer to 1) make word selection more diverse,
         defaults to 1
         :type top_p: float, optional
-        :param base_url: The base URL of the LLM, defaults to None
-        :type base_url: Optional[str], optional
+        :param top_k: Controls the diversity of words. Higher values make word selection more diverse, defaults to 0
+        :type top_k: int, optional
+        :param models: Controls the Openrouter models used, defaults to None
+        :type models: Optional[list[str]], optional
+        :param route: Controls the Openrouter route used, defaults to "fallback"
+        :type route: Optional[str], optional
+        :param openrouter_base_url: Controls the Openrouter base URL used, defaults to "https://openrouter.ai/api/v1"
+        :type openrouter_base_url: Optional[str], optional
+        :param site_url: Controls the Openrouter site URL used, defaults to None
+        :type site_url: Optional[str], optional
+        :param app_name: Controls the Openrouter app name used, defaults to None
+        :type app_name: Optional[str], optional
+        :param ollama_base_url: The base URL of the LLM, defaults to None
+        :type ollama_base_url: Optional[str], optional
         """
         
         self.model = model
         self.temperature = temperature
         self.max_tokens = max_tokens
         self.top_p = top_p
+        self.top_k = top_k
+
+        # Openrouter specific
+        self.models = models
+        self.route = route
+        self.openrouter_base_url = openrouter_base_url
+        self.site_url = site_url
+        self.app_name = app_name
 
         # Ollama specific
-        self.base_url = base_url
+        self.ollama_base_url = ollama_base_url
diff --git a/mem0/llms/ollama.py b/mem0/llms/ollama.py
index f2707816..f91870bf 100644
--- a/mem0/llms/ollama.py
+++ b/mem0/llms/ollama.py
@@ -14,7 +14,7 @@ class OllamaLLM(LLMBase):
 
         if not self.config.model:
             self.config.model="llama3.1:70b"
-        self.client = Client(host=self.config.base_url)
+        self.client = Client(host=self.config.ollama_base_url)
         self._ensure_model_exists()
 
     def _ensure_model_exists(self):
diff --git a/mem0/llms/openai.py b/mem0/llms/openai.py
index bedf0d8d..57131d7c 100644
--- a/mem0/llms/openai.py
+++ b/mem0/llms/openai.py
@@ -1,3 +1,4 @@
+import os
 import json
 from typing import Dict, List, Optional
 
@@ -12,7 +13,11 @@ class OpenAILLM(LLMBase):
 
         if not self.config.model:
             self.config.model="gpt-4o"
-        self.client = OpenAI()
+
+        if os.environ.get("OPENROUTER_API_KEY"):
+            self.client = OpenAI(api_key=os.environ.get("OPENROUTER_API_KEY"), base_url=self.config.openrouter_base_url)
+        else:
+            self.client = OpenAI()
     
     def _parse_response(self, response, tools):
         """
@@ -68,6 +73,23 @@ class OpenAILLM(LLMBase):
             "max_tokens": self.config.max_tokens, 
             "top_p": self.config.top_p
         }
+
+        if os.getenv("OPENROUTER_API_KEY"):
+            openrouter_params = {}
+            if self.config.models:
+                openrouter_params["models"] = self.config.models
+                openrouter_params["route"] = self.config.route
+                params.pop("model")
+            
+            if self.config.site_url and self.config.app_name:
+                    extra_headers={
+                        "HTTP-Referer": self.config.site_url,
+                        "X-Title": self.config.app_name
+                    }
+                    openrouter_params["extra_headers"] = extra_headers
+        
+            params.update(**openrouter_params)
+
         if response_format:
             params["response_format"] = response_format
         if tools: