diff --git a/api/core/model_runtime/model_providers/openai/llm/llm.py b/api/core/model_runtime/model_providers/openai/llm/llm.py
index 95533ccfaf771a..60d69c6e472156 100644
--- a/api/core/model_runtime/model_providers/openai/llm/llm.py
+++ b/api/core/model_runtime/model_providers/openai/llm/llm.py
@@ -615,10 +615,12 @@ def _chat_generate(
 
         block_as_stream = False
         if model.startswith("o1"):
-            block_as_stream = True
-            stream = False
-            if "stream_options" in extra_model_kwargs:
-                del extra_model_kwargs["stream_options"]
+            if stream:
+                block_as_stream = True
+                stream = False
+
+                if "stream_options" in extra_model_kwargs:
+                    del extra_model_kwargs["stream_options"]
 
             if "stop" in extra_model_kwargs:
                 del extra_model_kwargs["stop"]