diff --git a/tiktoken/model.py b/tiktoken/model.py
index 26201ce2..4337317e 100644
--- a/tiktoken/model.py
+++ b/tiktoken/model.py
@@ -15,6 +15,7 @@
     # chat
     "gpt-4": "cl100k_base",
     "gpt-3.5-turbo": "cl100k_base",
+    "gpt-3.5": "cl100k_base",  # Common shorthand
     "gpt-35-turbo": "cl100k_base",  # Azure deployment name
     # text
     "text-davinci-003": "p50k_base",
@@ -52,6 +53,7 @@
     "code-search-ada-code-001": "r50k_base",
     # open source
     "gpt2": "gpt2",
+    "gpt-2": "gpt2",  # Maintains consistency with gpt-4
 }