diff --git a/src/background/index.mjs b/src/background/index.mjs
index 0c30c6b..9affc6c 100644
--- a/src/background/index.mjs
+++ b/src/background/index.mjs
@@ -76,6 +76,7 @@ function setPortProxy(port, proxyTabId) {
 
 async function executeApi(session, port, config) {
   console.debug('modelName', session.modelName)
+  console.debug('apiMode', session.apiMode)
   if (chatgptWebModelKeys.includes(session.modelName)) {
     let tabId
     if (
diff --git a/src/components/ConversationCard/index.jsx b/src/components/ConversationCard/index.jsx
index 5e8d2f1..0661859 100644
--- a/src/components/ConversationCard/index.jsx
+++ b/src/components/ConversationCard/index.jsx
@@ -25,7 +25,7 @@ import FileSaver from 'file-saver'
 import { render } from 'preact'
 import FloatingToolbar from '../FloatingToolbar'
 import { useClampWindowSize } from '../../hooks/use-clamp-window-size'
-import { bingWebModelKeys, getUserConfig } from '../../config/index.mjs'
+import { bingWebModelKeys, getUserConfig, Models } from '../../config/index.mjs'
 import { useTranslation } from 'react-i18next'
 import DeleteButton from '../DeleteButton'
 import { useConfig } from '../../hooks/use-config.mjs'
@@ -380,8 +380,12 @@ function ConversationCard(props) {
             className="normal-button"
             required
             onChange={(e) => {
-              const apiMode = apiModes[e.target.value]
-              const modelName = apiModeToModelName(apiMode)
+              let apiMode = null
+              let modelName = 'customModel'
+              if (e.target.value !== -1) {
+                apiMode = apiModes[e.target.value]
+                modelName = apiModeToModelName(apiMode)
+              }
               const newSession = {
                 ...session,
                 modelName,
@@ -407,6 +411,9 @@ function ConversationCard(props) {
                 )
               }
             })}
+            <option value={-1} selected={!config.apiMode && config.modelName === 'customModel'}>
+              {t(Models.customModel.desc)}
+            </option>
           </select>
         </span>
         {props.draggable && !completeDraggable && (
diff --git a/src/popup/sections/GeneralPart.jsx b/src/popup/sections/GeneralPart.jsx
index 9f81583..cfd8ef8 100644
--- a/src/popup/sections/GeneralPart.jsx
+++ b/src/popup/sections/GeneralPart.jsx
@@ -22,6 +22,7 @@ import {
   ThemeMode,
   TriggerMode,
   isUsingMoonshotApi,
+  Models,
 } from '../../config/index.mjs'
 import Browser from 'webextension-polyfill'
 import { languageList } from '../../config/language.mjs'
@@ -184,6 +185,10 @@ export function GeneralPart({ config, updateConfig, setTabIndex }) {
             }
             required
             onChange={(e) => {
+              if (e.target.value === -1) {
+                updateConfig({ modelName: 'customModel', apiMode: null })
+                return
+              }
               const apiMode = apiModes[e.target.value]
               updateConfig({ apiMode: apiMode })
             }}
@@ -202,6 +207,9 @@ export function GeneralPart({ config, updateConfig, setTabIndex }) {
                 )
               }
             })}
+            <option value={-1} selected={!config.apiMode && config.modelName === 'customModel'}>
+              {t(Models.customModel.desc)}
+            </option>
           </select>
           {isUsingMultiModeModel(config) && (
             <select
diff --git a/src/services/apis/chatgpt-web.mjs b/src/services/apis/chatgpt-web.mjs
index 2366d21..0c70819 100644
--- a/src/services/apis/chatgpt-web.mjs
+++ b/src/services/apis/chatgpt-web.mjs
@@ -2,7 +2,7 @@
 
 import { fetchSSE } from '../../utils/fetch-sse.mjs'
 import { isEmpty } from 'lodash-es'
-import { chatgptWebModelKeys, getUserConfig, Models } from '../../config/index.mjs'
+import { getUserConfig, Models } from '../../config/index.mjs'
 import { pushRecord, setAbortController } from './shared.mjs'
 import Browser from 'webextension-polyfill'
 import { v4 as uuidv4 } from 'uuid'
@@ -236,7 +236,7 @@ export async function generateAnswersWithChatgptWebApi(port, question, session,
   console.debug('models', models)
   const selectedModel = modelNameToValue(session.modelName)
   const usedModel =
-    models && models.includes(selectedModel) ? selectedModel : Models[chatgptWebModelKeys[0]].value
+    models && models.includes(selectedModel) ? selectedModel : Models.chatgptFree35.value
   console.debug('usedModel', usedModel)
   const needArkoseToken = requirements && requirements.arkose?.required
   if (arkoseError && needArkoseToken) throw arkoseError