diff --git a/src/backend/src/modules/puterai/lib/OpenAIUtil.js b/src/backend/src/modules/puterai/lib/OpenAIUtil.js
index 045d04c840..6f21510896 100644
--- a/src/backend/src/modules/puterai/lib/OpenAIUtil.js
+++ b/src/backend/src/modules/puterai/lib/OpenAIUtil.js
@@ -120,6 +120,12 @@ const create_chat_stream_handler = ({
 
         const choice = chunk.choices[0];
 
+        if ( choice.delta.reasoning_content ){
+            textblock.addReasoning(choice.delta.reasoning_content);
+            // Q: Why don't "continue" to next chunk here?
+            // A: For now, reasoning_content and content never appear together, but I’m not sure if they’ll always be mutually exclusive.
+        }
+
         if ( choice.delta.content ){
             if ( mode === 'tool' ) {
                 toolblock.end();
diff --git a/src/backend/src/modules/puterai/lib/Streaming.js b/src/backend/src/modules/puterai/lib/Streaming.js
index 5bbfb8bff5..933c078b5d 100644
--- a/src/backend/src/modules/puterai/lib/Streaming.js
+++ b/src/backend/src/modules/puterai/lib/Streaming.js
@@ -35,6 +35,13 @@ class AIChatTextStream extends AIChatConstructStream {
         });
         this.chatStream.stream.write(json + '\n');
     }
+
+    addReasoning (reasoning) {
+        const json = JSON.stringify({
+            type: 'reasoning', reasoning,
+        });
+        this.chatStream.stream.write(json + '\n');
+    }
 }
 
 class AIChatToolUseStream extends AIChatConstructStream {