diff --git a/src/components/ConversationCard/index.jsx b/src/components/ConversationCard/index.jsx
index 138824f..440bfff 100644
--- a/src/components/ConversationCard/index.jsx
+++ b/src/components/ConversationCard/index.jsx
@@ -11,6 +11,7 @@ import {
   isFirefox,
   isMobile,
   isSafari,
+  isUsingModelName,
   modelNameToDesc,
 } from '../../utils'
 import {
@@ -25,7 +26,7 @@ import FileSaver from 'file-saver'
 import { render } from 'preact'
 import FloatingToolbar from '../FloatingToolbar'
 import { useClampWindowSize } from '../../hooks/use-clamp-window-size'
-import { bingWebModelKeys, getUserConfig, Models } from '../../config/index.mjs'
+import { getUserConfig, isUsingBingWebModel, Models } from '../../config/index.mjs'
 import { useTranslation } from 'react-i18next'
 import DeleteButton from '../DeleteButton'
 import { useConfig } from '../../hooks/use-config.mjs'
@@ -61,8 +62,7 @@ function ConversationCard(props) {
   const windowSize = useClampWindowSize([750, 1500], [250, 1100])
   const bodyRef = useRef(null)
   const [completeDraggable, setCompleteDraggable] = useState(false)
-  // `.some` for multi mode models. e.g. bingFree4-balanced
-  const useForegroundFetch = bingWebModelKeys.some((n) => session.modelName.includes(n))
+  const useForegroundFetch = isUsingBingWebModel(session)
   const [apiModes, setApiModes] = useState([])
 
   /**
@@ -247,7 +247,7 @@ function ConversationCard(props) {
         }
         try {
           const bingToken = (await getUserConfig()).bingAccessToken
-          if (session.modelName.includes('bingFreeSydney'))
+          if (isUsingModelName('bingFreeSydney', session))
             await generateAnswersWithBingWebApi(
               fakePort,
               session.question,
@@ -390,7 +390,11 @@ function ConversationCard(props) {
                 ...session,
                 modelName,
                 apiMode,
-                aiName: modelNameToDesc(apiMode ? apiModeToModelName(apiMode) : modelName, t),
+                aiName: modelNameToDesc(
+                  apiMode ? apiModeToModelName(apiMode) : modelName,
+                  t,
+                  config.customModelName,
+                ),
               }
               if (config.autoRegenAfterSwitchModel && conversationItemData.length > 0)
                 getRetryFn(newSession)()
@@ -399,7 +403,7 @@ function ConversationCard(props) {
           >
             {apiModes.map((apiMode, index) => {
               const modelName = apiModeToModelName(apiMode)
-              const desc = modelNameToDesc(modelName, t)
+              const desc = modelNameToDesc(modelName, t, config.customModelName)
               if (desc) {
                 return (
                   <option value={index} key={index} selected={isApiModeSelected(apiMode, session)}>
@@ -551,7 +555,6 @@ function ConversationCard(props) {
             key={idx}
             type={data.type}
             descName={data.type === 'answer' && session.aiName}
-            modelName={data.type === 'answer' && session.modelName}
             onRetry={idx === conversationItemData.length - 1 ? retryFn : null}
           />
         ))}
diff --git a/src/components/ConversationItem/index.jsx b/src/components/ConversationItem/index.jsx
index 44a5ec2..d9e9e9f 100644
--- a/src/components/ConversationItem/index.jsx
+++ b/src/components/ConversationItem/index.jsx
@@ -5,30 +5,18 @@ import ReadButton from '../ReadButton'
 import PropTypes from 'prop-types'
 import MarkdownRender from '../MarkdownRender/markdown.jsx'
 import { useTranslation } from 'react-i18next'
-import { isUsingCustomModel } from '../../config/index.mjs'
-import { useConfig } from '../../hooks/use-config.mjs'
 
-function AnswerTitle({ descName, modelName }) {
+function AnswerTitle({ descName }) {
   const { t } = useTranslation()
-  const config = useConfig()
 
-  return (
-    <p style="white-space: nowrap;">
-      {descName && modelName
-        ? `${t(descName)}${
-            isUsingCustomModel({ modelName }) ? ' (' + config.customModelName + ')' : ''
-          }:`
-        : t('Loading...')}
-    </p>
-  )
+  return <p style="white-space: nowrap;">{descName ? `${descName}:` : t('Loading...')}</p>
 }
 
 AnswerTitle.propTypes = {
   descName: PropTypes.string,
-  modelName: PropTypes.string,
 }
 
-export function ConversationItem({ type, content, descName, modelName, onRetry }) {
+export function ConversationItem({ type, content, descName, onRetry }) {
   const { t } = useTranslation()
   const [collapsed, setCollapsed] = useState(false)
 
@@ -67,17 +55,17 @@ export function ConversationItem({ type, content, descName, modelName, onRetry }
       return (
         <div className={'chatgptbox-' + type} dir="auto">
           <div className="gpt-header">
-            <AnswerTitle descName={descName} modelName={modelName} />
+            <AnswerTitle descName={descName} />
             <div className="gpt-util-group">
               {onRetry && (
                 <span title={t('Retry')} className="gpt-util-icon" onClick={onRetry}>
                   <SyncIcon size={14} />
                 </span>
               )}
-              {modelName && (
+              {descName && (
                 <CopyButton contentFn={() => content.replace(/\n<hr\/>$/, '')} size={14} />
               )}
-              {modelName && <ReadButton contentFn={() => content} size={14} />}
+              {descName && <ReadButton contentFn={() => content} size={14} />}
               {!collapsed ? (
                 <span
                   title={t('Collapse')}
@@ -141,7 +129,6 @@ ConversationItem.propTypes = {
   type: PropTypes.oneOf(['question', 'answer', 'error']).isRequired,
   content: PropTypes.string.isRequired,
   descName: PropTypes.string,
-  modelName: PropTypes.string,
   onRetry: PropTypes.func,
 }
 
diff --git a/src/config/index.mjs b/src/config/index.mjs
index 50f0af9..b5270cc 100644
--- a/src/config/index.mjs
+++ b/src/config/index.mjs
@@ -1,7 +1,11 @@
 import { defaults } from 'lodash-es'
 import Browser from 'webextension-polyfill'
 import { isMobile } from '../utils/is-mobile.mjs'
-import { isInApiModeGroup, modelNameToDesc } from '../utils/model-name-convert.mjs'
+import {
+  isInApiModeGroup,
+  isUsingModelName,
+  modelNameToDesc,
+} from '../utils/model-name-convert.mjs'
 import { t } from 'i18next'
 
 export const TriggerMode = {
@@ -526,7 +530,7 @@ export function isUsingCustomModel(configOrSession) {
  * @deprecated
  */
 export function isUsingCustomNameOnlyModel(configOrSession) {
-  return configOrSession.modelName === 'poeAiWebCustom'
+  return isUsingModelName('poeAiWebCustom', configOrSession)
 }
 
 export async function getPreferredLanguageKey() {
diff --git a/src/content-script/index.jsx b/src/content-script/index.jsx
index c3bbe48..591881e 100644
--- a/src/content-script/index.jsx
+++ b/src/content-script/index.jsx
@@ -9,6 +9,7 @@ import {
   chatgptWebModelKeys,
   getPreferredLanguageKey,
   getUserConfig,
+  isUsingChatgptWebModel,
   setAccessToken,
   setUserConfig,
 } from '../config/index.mjs'
@@ -91,7 +92,11 @@ async function mountComponent(siteConfig) {
 
     render(
       <FloatingToolbar
-        session={initSession({ modelName: userConfig.modelName, apiMode: userConfig.apiMode })}
+        session={initSession({
+          modelName: userConfig.modelName,
+          apiMode: userConfig.apiMode,
+          extraCustomModelName: userConfig.customModelName,
+        })}
         selection=""
         container={toolbarContainer}
         triggered={triggered}
@@ -107,7 +112,11 @@ async function mountComponent(siteConfig) {
   container.id = 'chatgptbox-container'
   render(
     <DecisionCard
-      session={initSession({ modelName: userConfig.modelName, apiMode: userConfig.apiMode })}
+      session={initSession({
+        modelName: userConfig.modelName,
+        apiMode: userConfig.apiMode,
+        extraCustomModelName: userConfig.customModelName,
+      })}
       question={question}
       siteConfig={siteConfig}
       container={container}
@@ -154,7 +163,11 @@ const createSelectionTools = async (toolbarContainer, selection) => {
   const userConfig = await getUserConfig()
   render(
     <FloatingToolbar
-      session={initSession({ modelName: userConfig.modelName, apiMode: userConfig.apiMode })}
+      session={initSession({
+        modelName: userConfig.modelName,
+        apiMode: userConfig.apiMode,
+        extraCustomModelName: userConfig.customModelName,
+      })}
       selection={selection}
       container={toolbarContainer}
       dockable={true}
@@ -280,7 +293,11 @@ async function prepareForRightClickMenu() {
       const userConfig = await getUserConfig()
       render(
         <FloatingToolbar
-          session={initSession({ modelName: userConfig.modelName, apiMode: userConfig.apiMode })}
+          session={initSession({
+            modelName: userConfig.modelName,
+            apiMode: userConfig.apiMode,
+            extraCustomModelName: userConfig.customModelName,
+          })}
           selection={data.selectionText}
           container={container}
           triggered={true}
@@ -382,7 +399,7 @@ async function prepareForForegroundRequests() {
   })
 
   registerPortListener(async (session, port) => {
-    if (chatgptWebModelKeys.includes(session.modelName)) {
+    if (isUsingChatgptWebModel(session)) {
       const accessToken = await getChatGptAccessToken()
       await generateAnswersWithChatgptWebApi(port, session.question, session, accessToken)
     }
diff --git a/src/services/apis/bing-web.mjs b/src/services/apis/bing-web.mjs
index 614c765..a12bc8b 100644
--- a/src/services/apis/bing-web.mjs
+++ b/src/services/apis/bing-web.mjs
@@ -1,7 +1,7 @@
 import BingAIClient from '../clients/bing/index.mjs'
 import { getUserConfig } from '../../config/index.mjs'
 import { pushRecord, setAbortController } from './shared.mjs'
-import { isCustomModelName, modelNameToCustomPart } from '../../utils/model-name-convert.mjs'
+import { getModelValue } from '../../utils/model-name-convert.mjs'
 
 /**
  * @param {Runtime.Port} port
@@ -19,9 +19,8 @@ export async function generateAnswersWithBingWebApi(
 ) {
   const { controller, messageListener, disconnectListener } = setAbortController(port)
   const config = await getUserConfig()
-  let modelMode
-  if (isCustomModelName(session.modelName)) modelMode = modelNameToCustomPart(session.modelName)
-  else modelMode = config.modelMode
+  let modelMode = getModelValue(session)
+  if (!modelMode) modelMode = config.modelMode
 
   console.debug('mode', modelMode)
 
diff --git a/src/services/apis/chatgpt-web.mjs b/src/services/apis/chatgpt-web.mjs
index 0c70819..75e21b1 100644
--- a/src/services/apis/chatgpt-web.mjs
+++ b/src/services/apis/chatgpt-web.mjs
@@ -9,7 +9,7 @@ import { v4 as uuidv4 } from 'uuid'
 import { t } from 'i18next'
 import { sha3_512 } from 'js-sha3'
 import randomInt from 'random-int'
-import { modelNameToValue } from '../../utils/model-name-convert.mjs'
+import { getModelValue } from '../../utils/model-name-convert.mjs'
 
 async function request(token, method, path, data) {
   const apiUrl = (await getUserConfig()).customChatGptWebApiUrl
@@ -234,7 +234,7 @@ export async function generateAnswersWithChatgptWebApi(port, question, session,
     isNeedWebsocket(accessToken).catch(() => undefined),
   ])
   console.debug('models', models)
-  const selectedModel = modelNameToValue(session.modelName)
+  const selectedModel = getModelValue(session)
   const usedModel =
     models && models.includes(selectedModel) ? selectedModel : Models.chatgptFree35.value
   console.debug('usedModel', usedModel)
diff --git a/src/services/apis/claude-api.mjs b/src/services/apis/claude-api.mjs
index e5ab498..d271903 100644
--- a/src/services/apis/claude-api.mjs
+++ b/src/services/apis/claude-api.mjs
@@ -3,7 +3,7 @@ import { pushRecord, setAbortController } from './shared.mjs'
 import { fetchSSE } from '../../utils/fetch-sse.mjs'
 import { isEmpty } from 'lodash-es'
 import { getConversationPairs } from '../../utils/get-conversation-pairs.mjs'
-import { modelNameToValue } from '../../utils/model-name-convert.mjs'
+import { getModelValue } from '../../utils/model-name-convert.mjs'
 
 /**
  * @param {Runtime.Port} port
@@ -14,7 +14,7 @@ export async function generateAnswersWithClaudeApi(port, question, session) {
   const { controller, messageListener, disconnectListener } = setAbortController(port)
   const config = await getUserConfig()
   const apiUrl = config.customClaudeApiUrl
-  const modelName = session.modelName
+  const model = getModelValue(session)
 
   const prompt = getConversationPairs(
     session.conversationRecords.slice(-config.maxConversationContextLength),
@@ -32,7 +32,7 @@ export async function generateAnswersWithClaudeApi(port, question, session) {
       'x-api-key': config.claudeApiKey,
     },
     body: JSON.stringify({
-      model: modelNameToValue(modelName),
+      model,
       messages: prompt,
       stream: true,
       max_tokens: config.maxResponseTokenLength,
diff --git a/src/services/apis/claude-web.mjs b/src/services/apis/claude-web.mjs
index 5b0c1b4..2c5307f 100644
--- a/src/services/apis/claude-web.mjs
+++ b/src/services/apis/claude-web.mjs
@@ -1,24 +1,18 @@
 import { pushRecord, setAbortController } from './shared.mjs'
 import Claude from '../clients/claude'
-import { modelNameToValue } from '../../utils/model-name-convert.mjs'
+import { getModelValue } from '../../utils/model-name-convert.mjs'
 
 /**
  * @param {Runtime.Port} port
  * @param {string} question
  * @param {Session} session
  * @param {string} sessionKey
- * @param {string} modelName
  */
-export async function generateAnswersWithClaudeWebApi(
-  port,
-  question,
-  session,
-  sessionKey,
-  modelName,
-) {
+export async function generateAnswersWithClaudeWebApi(port, question, session, sessionKey) {
   const bot = new Claude({ sessionKey })
   await bot.init()
   const { controller, cleanController } = setAbortController(port)
+  const model = getModelValue(session)
 
   let answer = ''
   const progressFunc = ({ completion }) => {
@@ -35,7 +29,7 @@ export async function generateAnswersWithClaudeWebApi(
   const params = {
     progress: progressFunc,
     done: doneFunc,
-    model: modelNameToValue(modelName),
+    model,
     signal: controller.signal,
   }
 
diff --git a/src/services/apis/moonshot-web.mjs b/src/services/apis/moonshot-web.mjs
index e9a3ace..a9cfcbf 100644
--- a/src/services/apis/moonshot-web.mjs
+++ b/src/services/apis/moonshot-web.mjs
@@ -2,7 +2,7 @@ import { pushRecord, setAbortController } from './shared.mjs'
 import { setUserConfig } from '../../config/index.mjs'
 import { fetchSSE } from '../../utils/fetch-sse'
 import { isEmpty } from 'lodash-es'
-import { modelNameToValue } from '../../utils/model-name-convert.mjs'
+import { getModelValue } from '../../utils/model-name-convert.mjs'
 
 export class MoonshotWeb {
   /**
@@ -569,18 +569,12 @@ export class Message {
  * @param {string} question
  * @param {Session} session
  * @param {UserConfig} config
- * @param {string} modelName
  */
-export async function generateAnswersWithMoonshotWebApi(
-  port,
-  question,
-  session,
-  config,
-  modelName,
-) {
+export async function generateAnswersWithMoonshotWebApi(port, question, session, config) {
   const bot = new MoonshotWeb({ config })
   await bot.init()
   const { controller, cleanController } = setAbortController(port)
+  const model = getModelValue(session)
 
   let answer = ''
   const progressFunc = ({ completion }) => {
@@ -597,7 +591,7 @@ export async function generateAnswersWithMoonshotWebApi(
   const params = {
     progress: progressFunc,
     done: doneFunc,
-    model: modelNameToValue(modelName),
+    model,
     signal: controller.signal,
   }
 
diff --git a/src/services/apis/openai-api.mjs b/src/services/apis/openai-api.mjs
index 75bcbd2..4a5efb5 100644
--- a/src/services/apis/openai-api.mjs
+++ b/src/services/apis/openai-api.mjs
@@ -10,23 +10,17 @@ import {
   pushRecord,
   setAbortController,
 } from './shared.mjs'
-import { modelNameToValue } from '../../utils/model-name-convert.mjs'
+import { getModelValue } from '../../utils/model-name-convert.mjs'
 
 /**
  * @param {Browser.Runtime.Port} port
  * @param {string} question
  * @param {Session} session
  * @param {string} apiKey
- * @param {string} modelName
  */
-export async function generateAnswersWithGptCompletionApi(
-  port,
-  question,
-  session,
-  apiKey,
-  modelName,
-) {
+export async function generateAnswersWithGptCompletionApi(port, question, session, apiKey) {
   const { controller, messageListener, disconnectListener } = setAbortController(port)
+  const model = getModelValue(session)
 
   const config = await getUserConfig()
   const prompt =
@@ -55,7 +49,7 @@ export async function generateAnswersWithGptCompletionApi(
     },
     body: JSON.stringify({
       prompt: prompt,
-      model: modelNameToValue(modelName),
+      model,
       stream: true,
       max_tokens: config.maxResponseTokenLength,
       temperature: config.temperature,
@@ -129,6 +123,7 @@ export async function generateAnswersWithChatgptApiCompat(
   extraBody = {},
 ) {
   const { controller, messageListener, disconnectListener } = setAbortController(port)
+  const model = getModelValue(session)
 
   const config = await getUserConfig()
   const prompt = getConversationPairs(
@@ -155,7 +150,7 @@ export async function generateAnswersWithChatgptApiCompat(
     },
     body: JSON.stringify({
       messages: prompt,
-      model: modelNameToValue(modelName),
+      model,
       stream: true,
       max_tokens: config.maxResponseTokenLength,
       temperature: config.temperature,
diff --git a/src/services/init-session.mjs b/src/services/init-session.mjs
index e96f1cd..52b0702 100644
--- a/src/services/init-session.mjs
+++ b/src/services/init-session.mjs
@@ -37,6 +37,7 @@ import { t } from 'i18next'
  * @param {string|null} modelName
  * @param {boolean|null} autoClean
  * @param {Object|null} apiMode
+ * @param {string} extraCustomModelName
  * @returns {Session}
  */
 export function initSession({
@@ -46,6 +47,7 @@ export function initSession({
   modelName = null,
   autoClean = false,
   apiMode = null,
+  extraCustomModelName = '',
 } = {}) {
   return {
     // common
@@ -59,7 +61,11 @@ export function initSession({
 
     aiName:
       modelName || apiMode
-        ? modelNameToDesc(apiMode ? apiModeToModelName(apiMode) : modelName, t)
+        ? modelNameToDesc(
+            apiMode ? apiModeToModelName(apiMode) : modelName,
+            t,
+            extraCustomModelName,
+          )
         : null,
     modelName,
     apiMode,
diff --git a/src/services/local-session.mjs b/src/services/local-session.mjs
index e6da7a1..f8be09d 100644
--- a/src/services/local-session.mjs
+++ b/src/services/local-session.mjs
@@ -9,6 +9,7 @@ export const initDefaultSession = async () => {
     modelName: config.modelName,
     apiMode: config.apiMode,
     autoClean: false,
+    extraCustomModelName: config.customModelName,
   })
 }
 
diff --git a/src/services/wrappers.mjs b/src/services/wrappers.mjs
index 28f55fb..5b29193 100644
--- a/src/services/wrappers.mjs
+++ b/src/services/wrappers.mjs
@@ -1,8 +1,8 @@
 import {
-  bingWebModelKeys,
-  claudeWebModelKeys,
   clearOldAccessToken,
   getUserConfig,
+  isUsingBingWebModel,
+  isUsingClaudeWebModel,
   setAccessToken,
 } from '../config/index.mjs'
 import Browser from 'webextension-polyfill'
@@ -70,15 +70,14 @@ export function handlePortError(session, port, err) {
       else if (['authentication token has expired'].some((m) => err.message.includes(m)))
         port.postMessage({ error: 'UNAUTHORIZED' })
       else if (
-        claudeWebModelKeys.includes(session.modelName) &&
+        isUsingClaudeWebModel(session) &&
         ['Invalid authorization', 'Session key required'].some((m) => err.message.includes(m))
       )
         port.postMessage({
           error: t('Please login at https://claude.ai first, and then click the retry button'),
         })
       else if (
-        // `.some` for multi mode models. e.g. bingFree4-balanced
-        bingWebModelKeys.some((n) => session.modelName.includes(n)) &&
+        isUsingBingWebModel(session) &&
         ['/turing/conversation/create: failed to parse response body.'].some((m) =>
           err.message.includes(m),
         )
@@ -88,7 +87,7 @@ export function handlePortError(session, port, err) {
     }
   } else {
     const errMsg = JSON.stringify(err)
-    if (bingWebModelKeys.some((n) => session.modelName.includes(n)) && errMsg.includes('isTrusted'))
+    if (isUsingBingWebModel(session) && errMsg.includes('isTrusted'))
       port.postMessage({ error: t('Please login at https://bing.com first') })
     else port.postMessage({ error: errMsg ?? 'unknown error' })
   }
@@ -108,6 +107,7 @@ export function registerPortListener(executor) {
         session.aiName = modelNameToDesc(
           session.apiMode ? apiModeToModelName(session.apiMode) : session.modelName,
           t,
+          config.customModelName,
         )
       port.postMessage({ session })
       try {
diff --git a/src/utils/crop-text.mjs b/src/utils/crop-text.mjs
index 75da9ad..c6826f5 100644
--- a/src/utils/crop-text.mjs
+++ b/src/utils/crop-text.mjs
@@ -38,6 +38,7 @@ export async function cropText(
   const userConfig = await getUserConfig()
   const k = modelNameToDesc(
     userConfig.apiMode ? apiModeToModelName(userConfig.apiMode) : userConfig.modelName,
+    userConfig.customModelName,
   ).match(/[- (]*([0-9]+)k/)?.[1]
   if (k) {
     maxLength = Number(k) * 1000
diff --git a/src/utils/model-name-convert.mjs b/src/utils/model-name-convert.mjs
index 6734cf0..f465407 100644
--- a/src/utils/model-name-convert.mjs
+++ b/src/utils/model-name-convert.mjs
@@ -1,8 +1,13 @@
 import { AlwaysCustomGroups, ModelGroups, ModelMode, Models } from '../config/index.mjs'
 
-export function modelNameToDesc(modelName, t) {
+export function modelNameToDesc(modelName, t, extraCustomModelName = '') {
   if (!t) t = (x) => x
-  if (modelName in Models) return t(Models[modelName].desc)
+  if (modelName in Models) {
+    const desc = t(Models[modelName].desc)
+    if (modelName === 'customModel' && extraCustomModelName)
+      return `${desc} (${extraCustomModelName})`
+    return desc
+  }
 
   let desc = modelName
   if (isCustomModelName(modelName)) {
@@ -41,6 +46,13 @@ export function modelNameToValue(modelName) {
   return modelNameToCustomPart(modelName)
 }
 
+export function getModelValue(configOrSession) {
+  let value
+  if (configOrSession.apiMode) value = modelNameToValue(apiModeToModelName(configOrSession.apiMode))
+  else value = modelNameToValue(configOrSession.modelName)
+  return value
+}
+
 export function isCustomModelName(modelName) {
   return modelName ? modelName.includes('-') : false
 }
@@ -113,6 +125,23 @@ export function isApiModeSelected(apiMode, configOrSession) {
     : configOrSession.modelName === apiModeToModelName(apiMode)
 }
 
+// also match custom modelName, e.g. when modelName is bingFree4, configOrSession model is bingFree4-fast, it returns true
+export function isUsingModelName(modelName, configOrSession) {
+  let configOrSessionModelName = configOrSession.apiMode
+    ? apiModeToModelName(configOrSession.apiMode)
+    : configOrSession.modelName
+  if (modelName === configOrSessionModelName) {
+    return true
+  }
+
+  if (isCustomModelName(configOrSessionModelName)) {
+    const presetPart = modelNameToPresetPart(configOrSessionModelName)
+    if (presetPart in Models) configOrSessionModelName = presetPart
+    else if (presetPart in ModelGroups) configOrSessionModelName = ModelGroups[presetPart].value[0]
+  }
+  return configOrSessionModelName === modelName
+}
+
 export function getModelNameGroup(modelName) {
   const presetPart = modelNameToPresetPart(modelName)
   return (