From 8e6487ddd9cba426170219f4ff112524ef794d27 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Magnus=20K=C3=BChne?= <kuehne.magnus@gmail.com>
Date: Fri, 21 Nov 2025 14:14:23 +0100
Subject: [PATCH] Add GPT-5.1 support with o200k_base encoding

---
 tiktoken/model.py | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/tiktoken/model.py b/tiktoken/model.py
index 5c669af..9dbc75b 100644
--- a/tiktoken/model.py
+++ b/tiktoken/model.py
@@ -9,6 +9,7 @@
     "o3-": "o200k_base",
     "o4-mini-": "o200k_base",
     # chat
+    "gpt-5.1-": "o200k_base",
     "gpt-5-": "o200k_base",
     "gpt-4.5-": "o200k_base",
     "gpt-4.1-": "o200k_base",
@@ -32,6 +33,7 @@
     "o3": "o200k_base",
     "o4-mini": "o200k_base",
     # chat
+    "gpt-5.1": "o200k_base",
     "gpt-5": "o200k_base",
     "gpt-4.1": "o200k_base",
     "gpt-4o": "o200k_base",