diff --git a/deploy/profile-scripts/llm_client.py b/deploy/profile-scripts/llm_client.py
index 438d04e7..d006c1f9 100644
--- a/deploy/profile-scripts/llm_client.py
+++ b/deploy/profile-scripts/llm_client.py
@@ -187,6 +187,9 @@ def call_llm(prompt, model=None, max_tokens=4096, timeout=150,
         永远不抛异常到调用方。
     """
     model_name = model or REASSESS_MODEL
+    # OCG/deepseek 对过小 max_tokens 会短路返回空（2026-07-22 实测 max_tokens=64 必空）
+    if max_tokens < 512:
+        max_tokens = 512
     messages = []
     if system:
         messages.append({"role": "system", "content": system})