diff --git a/src/models/index.ts b/src/models/index.ts
index a446944..1298b83 100644
--- a/src/models/index.ts
+++ b/src/models/index.ts
@@ -13,6 +13,7 @@ export const oaiEncodings = z.enum([
 
 export const chatModels = z.enum([
   "gpt-4o",
+  "gpt-4o-mini",
   "gpt-3.5-turbo",
   "gpt-4",
   "gpt-4-32k",
@@ -125,6 +126,7 @@ export function isChatModel(
   return (
     model === "gpt-3.5-turbo" ||
     model === "gpt-4o" ||
+    model === "gpt-4o-mini" ||
     model === "gpt-4" ||
     model === "gpt-4-1106-preview" ||
     model === "gpt-4-32k"
diff --git a/src/models/tokenizer.ts b/src/models/tokenizer.ts
index 477b27c..e897a4a 100644
--- a/src/models/tokenizer.ts
+++ b/src/models/tokenizer.ts
@@ -46,7 +46,7 @@ export class TiktokenTokenizer implements Tokenizer {
               "<|im_end|>": 100265,
               "<|im_sep|>": 100266,
             })
-          : model === "gpt-4o"
+          : model === "gpt-4o" || model === "gpt-4o-mini"
           ? get_encoding("o200k_base", {
               "<|im_start|>": 200264,
               "<|im_end|>": 200265,
diff --git a/src/sections/ChatGPTEditor.tsx b/src/sections/ChatGPTEditor.tsx
index 18e6d13..a2c84ca 100644
--- a/src/sections/ChatGPTEditor.tsx
+++ b/src/sections/ChatGPTEditor.tsx
@@ -54,6 +54,7 @@ function getChatGPTEncoding(
     | "gpt-4-1106-preview"
     | "gpt-4"
     | "gpt-4o"
+    | "gpt-4o-mini"
     | "gpt-4-32k"
 ) {
   const isGpt3 = model === "gpt-3.5-turbo";
@@ -77,6 +78,7 @@ export function ChatGPTEditor(props: {
     | "gpt-4-1106-preview"
     | "gpt-4-32k"
     | "gpt-4o"
+    | "gpt-4o-mini"
     | "gpt-3.5-turbo";
   onChange: (value: string) => void;
 }) {