diff --git a/evals/benchmark/stresscli/locust/aistress.py b/evals/benchmark/stresscli/locust/aistress.py
index ee1b0edd..0a565844 100644
--- a/evals/benchmark/stresscli/locust/aistress.py
+++ b/evals/benchmark/stresscli/locust/aistress.py
@@ -224,6 +224,7 @@ def on_locust_init(environment, **_kwargs):
     os.environ["OPEA_EVAL_SEED"] = environment.parsed_options.seed
     os.environ["OPEA_EVAL_PROMPTS"] = environment.parsed_options.prompts
     os.environ["OPEA_EVAL_MAX_OUTPUT_TOKENS"] = str(environment.parsed_options.max_output)
+    os.environ["LLM_MODEL"] = environment.parsed_options.llm_model
     try:
         bench_package = __import__(environment.parsed_options.bench_target)
     except ImportError: