diff --git a/.changeset/twelve-chairs-rhyme.md b/.changeset/twelve-chairs-rhyme.md
new file mode 100644
index 0000000..d6e8f2b
--- /dev/null
+++ b/.changeset/twelve-chairs-rhyme.md
@@ -0,0 +1,7 @@
+---
+"js-tiktoken": patch
+"tiktoken": patch
+"@dqbd/tiktoken": patch
+---
+
+Add gpt-4o support