diff --git a/src/proxy/middleware/request/preprocessors/validate-context-size.ts b/src/proxy/middleware/request/preprocessors/validate-context-size.ts
index e639b37..887b039 100644
--- a/src/proxy/middleware/request/preprocessors/validate-context-size.ts
+++ b/src/proxy/middleware/request/preprocessors/validate-context-size.ts
@@ -68,9 +68,11 @@ export const validateContextSize: RequestPreprocessor = async (req) => {
     modelMax = 131072;
   } else if (model.match(/^gpt-4(-\d{4})?-vision(-preview)?$/)) {
     modelMax = 131072;
+  } else if (model.match(/^o1(-\d{4}-\d{2}-\d{2})?$/)) {
+    modelMax = 200000;
   } else if (model.match(/^o1-mini(-\d{4}-\d{2}-\d{2})?$/)) {
     modelMax = 128000;
-  } else if (model.match(/^o1(-preview)?(-\d{4}-\d{2}-\d{2})?$/)) {
+  } else if (model.match(/^o1-preview(-\d{4}-\d{2}-\d{2})?$/)) {
     modelMax = 128000;
   } else if (model.match(/gpt-3.5-turbo/)) {
     modelMax = 16384;