diff --git a/prompting/llms/apis/sn19_wrapper.py b/prompting/llms/apis/sn19_wrapper.py
index a227d2ab5..e8445146b 100644
--- a/prompting/llms/apis/sn19_wrapper.py
+++ b/prompting/llms/apis/sn19_wrapper.py
@@ -39,6 +39,9 @@ def chat_complete(
     response = requests.post(url, headers=headers, data=json.dumps(data))
     try:
         response_json = response.json()
-        return response_json["choices"][0]["message"].get("content")
+        try:
+            return response_json["choices"][0]["message"].get("content")
+        except KeyError:
+            return response_json["choices"][0]["delta"].get("content")
     except Exception as e:
         logger.exception(f"Error in chat_complete: {e}")