diff --git a/api/src/stampy_chat/env.py b/api/src/stampy_chat/env.py
index 54520f3..dd4a390 100644
--- a/api/src/stampy_chat/env.py
+++ b/api/src/stampy_chat/env.py
@@ -20,7 +20,7 @@
 
 ### Models ###
 EMBEDDING_MODEL = os.environ.get("EMBEDDING_MODEL", "text-embedding-ada-002")
-COMPLETIONS_MODEL = os.environ.get("COMPLETIONS_MODEL", "gpt-3.5-turbo")
+COMPLETIONS_MODEL = os.environ.get("COMPLETIONS_MODEL", "claude-3-opus-20240229")
 
 ### Pinecone ###
 PINECONE_API_KEY     = os.environ.get('PINECONE_API_KEY')