diff --git a/agent/model_metadata.py b/agent/model_metadata.py
index dbbcf81b72f..c8b107ae310 100644
--- a/agent/model_metadata.py
+++ b/agent/model_metadata.py
@@ -1077,7 +1077,7 @@ def _load_context_cache() -> Dict[str, int]:
     try:
         with open(path, encoding="utf-8") as f:
             data = yaml.safe_load(f) or {}
-        return data.get("context_lengths", {})
+        return data.get("context_lengths") or {}
     except Exception as e:
         logger.debug("Failed to load context length cache: %s", e)
         return {}