diff --git a/src/srtctl/benchmarks/scripts/sa-bench/backend_request_func.py b/src/srtctl/benchmarks/scripts/sa-bench/backend_request_func.py
index 1a715ee5..305aed28 100644
--- a/src/srtctl/benchmarks/scripts/sa-bench/backend_request_func.py
+++ b/src/srtctl/benchmarks/scripts/sa-bench/backend_request_func.py
@@ -632,6 +632,16 @@ def get_tokenizer(
     if custom_tokenizer:
         if custom_tokenizer == "glm_moe_dsa":
             return _load_glm_moe_dsa_tokenizer(pretrained_model_name_or_path)
+        if custom_tokenizer == "deepseek_v4":
+            try:
+                from vllm.tokenizers.deepseek_v4 import DeepseekV4Tokenizer
+            except ImportError as e:
+                raise ImportError(
+                    "DeepseekV4Tokenizer requires vllm package.\n"
+                    "Please install it with `pip install vllm` "
+                    "to use deepseek_v4 tokenizer."
+                ) from e
+            return DeepseekV4Tokenizer.from_pretrained(str(pretrained_model_name_or_path))
         from importlib import import_module
         try:
             module_path, class_name = custom_tokenizer.rsplit('.', 1)