diff --git a/src/renderer/src/store/thunk/messageThunk.ts b/src/renderer/src/store/thunk/messageThunk.ts
index 4e631bba65..09311ae8ba 100644
--- a/src/renderer/src/store/thunk/messageThunk.ts
+++ b/src/renderer/src/store/thunk/messageThunk.ts
@@ -987,12 +987,20 @@ export const regenerateAssistantResponseThunk =
       const blockIdsToDelete = [...(messageToResetEntity.blocks || [])]
 
       // 5. Reset the message entity in Redux
-      const resetAssistantMsg = resetAssistantMessage(messageToResetEntity, {
-        status: AssistantMessageStatus.PENDING,
-        updatedAt: new Date().toISOString(),
-        model: assistant.model,
-        modelId: assistant?.model?.id
-      })
+      const resetAssistantMsg = resetAssistantMessage(
+        messageToResetEntity,
+        // Grouped message (mentioned model message) should not reset model and modelId, always use the original model
+        assistantMessageToRegenerate.modelId
+          ? {
+              status: AssistantMessageStatus.PENDING,
+              updatedAt: new Date().toISOString()
+            }
+          : {
+              status: AssistantMessageStatus.PENDING,
+              updatedAt: new Date().toISOString(),
+              model: assistant.model
+            }
+      )
 
       dispatch(
         newMessagesActions.updateMessage({