diff --git a/claude_sonnet-3-7-bedrock.py b/claude_sonnet-3-7-bedrock.py
index 4d44bdb..ca37149 100644
--- a/claude_sonnet-3-7-bedrock.py
+++ b/claude_sonnet-3-7-bedrock.py
@@ -177,12 +177,16 @@ class Pipeline:
         # https://boto3.amazonaws.com/v1/documentation/api/latest/reference/services/bedrock-runtime/client/converse_stream.html
         streaming_response = self.bedrock_runtime.converse_stream(**payload)
         print(f"{streaming_response} for {payload}")
+        thinking_start = False
         for chunk in streaming_response["stream"]:
             if "contentBlockDelta" in chunk:
                 delta = chunk["contentBlockDelta"]["delta"]
                 
                 # Handle reasoning content (Chain of Thought)
                 if "reasoningContent" in delta and "text" in delta["reasoningContent"]:
+                  if not thinking_start:
+                    thinking_start = True
+                    yield "\n<Thinking>\n\n"
                   print(f"Reasoning content: {delta['reasoningContent']}") 
                   yield delta["reasoningContent"]["text"]