diff --git a/python/llm/test/benchmark/arc-perf-test.yaml b/python/llm/test/benchmark/arc-perf-test.yaml
index 9b5246bd..580adc50 100644
--- a/python/llm/test/benchmark/arc-perf-test.yaml
+++ b/python/llm/test/benchmark/arc-perf-test.yaml
@@ -8,6 +8,7 @@ local_model_hub: '/mnt/disk1/models'
 warm_up: 1
 num_trials: 3
 num_beams: 1 # default to greedy search
+low_bit: 'sym_int4' # default to use 'sym_int4' (i.e. symmetric int4)
 in_out_pairs:
   - '32-32'
   - '1024-128'