diff --git a/src/art/model.py b/src/art/model.py
index 21244ad8..0c706add 100644
--- a/src/art/model.py
+++ b/src/art/model.py
@@ -706,6 +706,9 @@ def __init__(
             report_metrics=report_metrics,
             **kwargs,
         )
+        if _internal_config is not None:
+            # Bypass BaseModel __setattr__ to allow setting private attr
+            object.__setattr__(self, "_internal_config", _internal_config)
         object.__setattr__(self, "_costs_lock", asyncio.Lock())
         object.__setattr__(self, "_cost_calculator", self._noop_cost_calculator)
 
@@ -725,9 +728,6 @@ def _noop_cost_calculator(
         _prompt_tokens: int | None, _completion_tokens: int | None
     ) -> dict[str, float]:
         return {}
-        if _internal_config is not None:
-            # Bypass BaseModel __setattr__ to allow setting private attr
-            object.__setattr__(self, "_internal_config", _internal_config)
 
     @overload
     def __new__(