diff --git a/litellm/llms/fine_tuning_apis/vertex_ai.py b/litellm/llms/fine_tuning_apis/vertex_ai.py
index beebb0d565..ffdb82c5b4 100644
--- a/litellm/llms/fine_tuning_apis/vertex_ai.py
+++ b/litellm/llms/fine_tuning_apis/vertex_ai.py
@@ -279,6 +279,12 @@ class VertexFineTuningAPI(VertexLLM):
         elif "countTokens" in request_route:
             url = f"https://{vertex_location}-aiplatform.googleapis.com/v1/projects/{vertex_project}/locations/{vertex_location}{request_route}"
         elif "cachedContents" in request_route:
+            _model = request_data.get("model")
+            if _model is not None and "/publishers/google/models/" not in _model:
+                request_data["model"] = (
+                    f"projects/{vertex_project}/locations/{vertex_location}/publishers/google/models/{_model}"
+                )
+
             url = f"https://{vertex_location}-aiplatform.googleapis.com/v1beta1/projects/{vertex_project}/locations/{vertex_location}{request_route}"
         else:
             raise ValueError(f"Unsupported Vertex AI request route: {request_route}")