diff --git a/src/renderer/src/config/models/reasoning.ts b/src/renderer/src/config/models/reasoning.ts
index 99be2269f3..42b862ed5a 100644
--- a/src/renderer/src/config/models/reasoning.ts
+++ b/src/renderer/src/config/models/reasoning.ts
@@ -201,7 +201,7 @@ export function isSupportedReasoningEffortGrokModel(model?: Model): boolean {
   }
 
   const modelId = getLowerBaseModelName(model.id)
-  const providerId = model.provider.toLowerCase()
+  const providerId = model?.provider?.toLowerCase()
   if (modelId.includes('grok-3-mini')) {
     return true
   }