diff --git a/src/khoj/processor/conversation/utils.py b/src/khoj/processor/conversation/utils.py
index 7bcac2d8..4a92c367 100644
--- a/src/khoj/processor/conversation/utils.py
+++ b/src/khoj/processor/conversation/utils.py
@@ -14,7 +14,12 @@ import queue
 from khoj.utils.helpers import merge_dicts
 
 logger = logging.getLogger(__name__)
-max_prompt_size = {"gpt-3.5-turbo": 4096, "gpt-4": 8192, "llama-2-7b-chat.ggmlv3.q4_K_S.bin": 1548}
+max_prompt_size = {
+    "gpt-3.5-turbo": 4096,
+    "gpt-4": 8192,
+    "llama-2-7b-chat.ggmlv3.q4_K_S.bin": 1548,
+    "gpt-3.5-turbo-16k": 15000,
+}
 tokenizer = {"llama-2-7b-chat.ggmlv3.q4_K_S.bin": "hf-internal-testing/llama-tokenizer"}