[Update] Default LLM (#3587)

mem0/llms/azure_openai.py

@@ -38,7 +38,7 @@ class AzureOpenAILLM(LLMBase):
 
         # Model name should match the custom deployment name chosen for it.
         if not self.config.model:
-            self.config.model = "gpt-4o"
+            self.config.model = "gpt-4.1-nano-2025-04-14"
 
         api_key = self.config.azure_kwargs.api_key or os.getenv("LLM_AZURE_OPENAI_API_KEY")
         azure_deployment = self.config.azure_kwargs.azure_deployment or os.getenv("LLM_AZURE_DEPLOYMENT")

mem0/llms/azure_openai_structured.py

@@ -16,7 +16,7 @@ class AzureOpenAIStructuredLLM(LLMBase):
 
         # Model name should match the custom deployment name chosen for it.
         if not self.config.model:
-            self.config.model = "gpt-4o-2024-08-06"
+            self.config.model = "gpt-4.1-nano-2025-04-14"
 
         api_key = self.config.azure_kwargs.api_key or os.getenv("LLM_AZURE_OPENAI_API_KEY")
         azure_deployment = self.config.azure_kwargs.azure_deployment or os.getenv("LLM_AZURE_DEPLOYMENT")

mem0/llms/litellm.py

@@ -16,7 +16,7 @@ class LiteLLM(LLMBase):
         super().__init__(config)
 
         if not self.config.model:
-            self.config.model = "gpt-4o-mini"
+            self.config.model = "gpt-4.1-nano-2025-04-14"
 
     def _parse_response(self, response, tools):
         """

mem0/llms/openai.py

@@ -35,7 +35,7 @@ class OpenAILLM(LLMBase):
         super().__init__(config)
 
         if not self.config.model:
-            self.config.model = "gpt-4o-mini"
+            self.config.model = "gpt-4.1-nano-2025-04-14"
 
         if os.environ.get("OPENROUTER_API_KEY"):  # Use OpenRouter
             self.client = OpenAI(