diff --git a/astrbot/core/provider/sources/openrouter_source.py b/astrbot/core/provider/sources/openrouter_source.py
index e49d0c929..a308ad309 100644
--- a/astrbot/core/provider/sources/openrouter_source.py
+++ b/astrbot/core/provider/sources/openrouter_source.py
@@ -20,3 +20,4 @@ class ProviderOpenRouter(ProviderOpenAIOfficial):
         self.client._custom_headers["X-OpenRouter-Categories"] = (
             "general-chat,personal-agent"  # type: ignore
         )
+        self.reasoning_key = "reasoning"