diff --git a/package-lock.json b/package-lock.json
index 27fe8268..094c3213 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -15371,9 +15371,10 @@
       "dev": true
     },
     "node_modules/tiktoken": {
-      "version": "1.0.15",
-      "resolved": "https://registry.npmjs.org/tiktoken/-/tiktoken-1.0.15.tgz",
-      "integrity": "sha512-sCsrq/vMWUSEW29CJLNmPvWxlVp7yh2tlkAjpJltIKqp5CKf98ZNpdeHRmAlPVFlGEbswDc6SmI8vz64W/qErw=="
+      "version": "1.0.16",
+      "resolved": "https://registry.npmjs.org/tiktoken/-/tiktoken-1.0.16.tgz",
+      "integrity": "sha512-hRcORIGF2YlAgWx3nzrGJOrKSJwLoc81HpXmMQk89632XAgURc7IeV2FgQ2iXo9z/J96fCvpsHg2kWoHcbj9fg==",
+      "license": "MIT"
     },
     "node_modules/tildify": {
       "version": "2.0.0",
@@ -16719,7 +16720,7 @@
         "string-hash": "^1.1.3",
         "string-length": "^6.0.0",
         "svgo": "^3.0.2",
-        "tiktoken": "^1.0.15",
+        "tiktoken": "^1.0.16",
         "together-ai": "^0.6.0-alpha.4",
         "tweetnacl": "^1.0.3",
         "ua-parser-js": "^1.0.38",
diff --git a/src/backend/package.json b/src/backend/package.json
index d55ced4e..196807c3 100644
--- a/src/backend/package.json
+++ b/src/backend/package.json
@@ -70,7 +70,7 @@
     "string-hash": "^1.1.3",
     "string-length": "^6.0.0",
     "svgo": "^3.0.2",
-    "tiktoken": "^1.0.15",
+    "tiktoken": "^1.0.16",
     "together-ai": "^0.6.0-alpha.4",
     "tweetnacl": "^1.0.3",
     "ua-parser-js": "^1.0.38",
diff --git a/src/backend/src/modules/puterai/OpenAICompletionService.js b/src/backend/src/modules/puterai/OpenAICompletionService.js
index 1de9d572..e9cca41f 100644
--- a/src/backend/src/modules/puterai/OpenAICompletionService.js
+++ b/src/backend/src/modules/puterai/OpenAICompletionService.js
@@ -91,8 +91,7 @@ class OpenAICompletionService extends BaseService {
             throw new Error('`messages` must be an array');
         }
 
-        model = model ?? 'gpt-3.5-turbo';
-        // model = model ?? 'gpt-4o';
+        model = model ?? 'gpt-4o-mini';
 
         for ( let i = 0; i < messages.length; i++ ) {
             let msg = messages[i];