diff --git a/vllm/model_executor/models/glm4_1v.py b/vllm/model_executor/models/glm4_1v.py
index 84989537d..3a06babf2 100644
--- a/vllm/model_executor/models/glm4_1v.py
+++ b/vllm/model_executor/models/glm4_1v.py
@@ -1788,6 +1788,20 @@ class Glm4vForConditionalGeneration(
             tower_model="visual.",
         )
 
+    def get_num_mm_encoder_tokens(
+        self,
+        num_image_tokens: int,
+    ) -> int:
+        merge_size = self.config.vision_config.spatial_merge_size
+        return num_image_tokens * (merge_size**2)
+
+    def get_num_mm_connector_tokens(
+        self,
+        num_vision_tokens: int,
+    ) -> int:
+        merge_size = self.config.vision_config.spatial_merge_size
+        return num_vision_tokens // (merge_size**2)
+
 
 @MULTIMODAL_REGISTRY.register_processor(
     Glm4vMultiModalProcessor,