diff --git a/src/core/direct_model_service.py b/src/core/direct_model_service.py
index 4251b467..86c395cf 100644
--- a/src/core/direct_model_service.py
+++ b/src/core/direct_model_service.py
@@ -33,9 +33,9 @@ def __init__(self, cache_duration_seconds: int = 300):
             cache_duration_seconds: Cache TTL in seconds (default: 300 = 5 minutes)
         """
         self.cache_duration = cache_duration_seconds
-        self._model_mapping: Dict[str, str] = {}  # name -> blockchain_id
+        self._model_mapping: Dict[str, str] = {}  # lowercase name -> blockchain_id
         self._id_to_name: Dict[str, str] = {}  # blockchain_id -> name
-        self._model_mapping_type: Dict[str, str] = {}  # name -> type
+        self._model_mapping_type: Dict[str, str] = {}  # lowercase name -> type
         self._blockchain_ids: set = set()
         self._cache_expiry: Optional[datetime] = None
         self._last_etag: Optional[str] = None
@@ -102,8 +102,7 @@ async def resolve_model_id(self, model_identifier: str) -> Optional[str]:
         if model_identifier in self._blockchain_ids:
             return model_identifier
         
-        # Check if it's a model name
-        return self._model_mapping.get(model_identifier)
+        return self._model_mapping.get(model_identifier.lower())
     
     async def get_model_name_from_id(self, blockchain_id: str) -> Optional[str]:
         """
@@ -214,9 +213,9 @@ def _update_cache(self, models: List[Dict], content_hash: str, etag: Optional[st
             model_type = model.get("ModelType")
             
             if model_name and blockchain_id:
-                new_mapping[model_name] = blockchain_id
+                new_mapping[model_name.lower()] = blockchain_id
                 new_id_to_name[blockchain_id] = model_name
-                new_mapping_type[model_name] = model_type
+                new_mapping_type[model_name.lower()] = model_type
                 new_blockchain_ids.add(blockchain_id)
         
         self._model_mapping = new_mapping
diff --git a/src/core/model_routing.py b/src/core/model_routing.py
index 478ef130..977bd258 100644
--- a/src/core/model_routing.py
+++ b/src/core/model_routing.py
@@ -110,7 +110,7 @@ async def _get_default_model_id(self, type: Optional[str] = "LLM") -> str:
             if default_model in model_mapping:
                 logger.info("Using configured default model",
                            default_model=default_model,
-                           blockchain_id=model_mapping[default_model],
+                           blockchain_id=model_mapping[default_model.lower()],
                            event_type="default_model_resolved")
                 return model_mapping[default_model]