diff --git a/app/models/openai_models.py b/app/models/openai_models.py
index b352ce1..3dcc196 100644
--- a/app/models/openai_models.py
+++ b/app/models/openai_models.py
@@ -32,6 +32,8 @@ class ToolCall(BaseModel):
 
 class ChatCompletionRequest(BaseModel):
     """OpenAI chat completion request."""
+    model_config = {"extra": "allow"}
+    
     model: str
     messages: List[ChatMessage]
     temperature: Optional[float] = Field(default=1.0, ge=0, le=2)