diff --git a/ai_engine_sdk/api_models/api_models.py b/ai_engine_sdk/api_models/api_models.py
index f99364c..990f5be 100644
--- a/ai_engine_sdk/api_models/api_models.py
+++ b/ai_engine_sdk/api_models/api_models.py
@@ -27,7 +27,7 @@ class ApiNewSessionRequest(BaseModel):
     email: str
     functionGroup: Optional[str] = None
     preferencesEnabled: bool
-    requestModel: str
+    requestedModel: str
 
 
 class ApiUserJsonMessage(ApiMessagePayload):
diff --git a/ai_engine_sdk/client.py b/ai_engine_sdk/client.py
index 7c0279c..29070c4 100644
--- a/ai_engine_sdk/client.py
+++ b/ai_engine_sdk/client.py
@@ -544,7 +544,7 @@ async def create_session(self, function_group: str, opts: Optional[dict] = None)
             email=opts.get('email') if opts else "",
             functionGroup=function_group,
             preferencesEnabled=False,
-            requestModel=opts.get('model') if opts and 'model' in opts else DefaultModelId
+            requestedModel=opts.get('model') if opts and 'model' in opts else DefaultModelId
         )
         response = await make_api_request(
             api_base_url=self._api_base_url,