diff --git a/manifest/clients/openai_chat.py b/manifest/clients/openai_chat.py
index 00e49d0..697e78b 100644
--- a/manifest/clients/openai_chat.py
+++ b/manifest/clients/openai_chat.py
@@ -10,7 +10,7 @@
 logger = logging.getLogger(__name__)
 
 # List from https://platform.openai.com/docs/models/model-endpoint-compatibility
-OPENAICHAT_ENGINES = {"gpt-3.5-turbo", "gpt-4", "gpt-4-32k"}
+OPENAICHAT_ENGINES = {"gpt-3.5-turbo", "gpt-3.5-turbo-16k", "gpt-4", "gpt-4-32k"}
 
 
 class OpenAIChatClient(OpenAIClient):