diff --git a/studio/backend/core/inference/external_provider.py b/studio/backend/core/inference/external_provider.py
index a8840a8ee3..d1f2aec813 100644
--- a/studio/backend/core/inference/external_provider.py
+++ b/studio/backend/core/inference/external_provider.py
@@ -522,7 +522,9 @@ class ExternalProviderClient:
         # service_tier is OpenAI Chat-only on the generic OAI-compat
         # branch; opt-in via `accepts_service_tier=True` on the registry
         # entry. Anthropic and Responses handle it in their own helpers.
-        if service_tier is not None and provider_info.get("accepts_service_tier", False):
+        if service_tier is not None and provider_info.get(
+            "accepts_service_tier", False
+        ):
             body["service_tier"] = service_tier
         if parallel_tool_calls is not None:
             body["parallel_tool_calls"] = parallel_tool_calls