diff --git a/src/renderer/src/config/constant.ts b/src/renderer/src/config/constant.ts
index a1d31d054..f666ee061 100644
--- a/src/renderer/src/config/constant.ts
+++ b/src/renderer/src/config/constant.ts
@@ -1,3 +1,2 @@
 export const DEFAULT_TEMPERATURE = 0.7
-export const DEFAULT_MAXTOKENS = 800
 export const DEFAULT_CONEXTCOUNT = 5
diff --git a/src/renderer/src/i18n/index.ts b/src/renderer/src/i18n/index.ts
index e7cfe431a..acf89b1e4 100644
--- a/src/renderer/src/i18n/index.ts
+++ b/src/renderer/src/i18n/index.ts
@@ -66,11 +66,10 @@ const resources = {
         'input.send': 'Send',
         'input.pause': 'Pause',
         'input.settings': 'Settings',
+        'input.estimated_tokens': 'Estimated tokens: ',
         'settings.temperature': 'Temperature',
         'settings.temperature.tip':
           'Lower values make the model more creative and unpredictable, while higher values make it more deterministic and precise.',
-        'settings.max_tokens': 'Max Tokens',
-        'settings.max_tokens.tip': 'The maximum number of tokens to generate in the completion.',
         'settings.conext_count': 'Context',
         'settings.conext_count.tip': 'The number of previous messages to keep in the context.',
         'settings.reset': 'Reset',
@@ -200,12 +199,10 @@ const resources = {
         'input.send': '发送',
         'input.pause': '暂停',
         'input.settings': '设置',
+        'input.estimated_tokens': '预估消耗',
         'settings.temperature': '模型温度',
         'settings.temperature.tip':
           '模型生成文本的随机程度。值越大，回复内容越赋有多样性、创造性、随机性；设为 0 根据事实回答。日常聊天建议设置为 0.7',
-        'settings.max_tokens': '最大回复',
-        'settings.max_tokens.tip':
-          '最大回复内容多少，数值越大，生成的文本越长。普通聊天建议 500-800；短文生成建议 800-2000；代码生成建议 2000-3600；长文生成建议切换模型到 4000 左右',
         'settings.conext_count': '上下文数',
         'settings.conext_count.tip':
           '要保留在上下文中的消息数量，数值越大，上下文越长，消耗的 token 越多。普通聊天建议 5-10，代码生成建议 5-10',
@@ -233,7 +230,7 @@ const resources = {
       },
       settings: {
         title: '设置',
-        general: '常规',
+        general: '常规设置',
         provider: '模型提供商',
         model: '模型设置',
         assistant: '默认助手',
diff --git a/src/renderer/src/pages/home/components/AssistantSettings.tsx b/src/renderer/src/pages/home/components/AssistantSettings.tsx
index 55012eb93..21fe6eafa 100644
--- a/src/renderer/src/pages/home/components/AssistantSettings.tsx
+++ b/src/renderer/src/pages/home/components/AssistantSettings.tsx
@@ -1,9 +1,10 @@
 import { QuestionCircleOutlined } from '@ant-design/icons'
-import { DEFAULT_CONEXTCOUNT, DEFAULT_MAXTOKENS, DEFAULT_TEMPERATURE } from '@renderer/config/constant'
+import { DEFAULT_CONEXTCOUNT, DEFAULT_TEMPERATURE } from '@renderer/config/constant'
 import { useAssistants } from '@renderer/hooks/useAssistant'
 import { Assistant } from '@renderer/types'
 import { Button, Col, InputNumber, Popover, Row, Slider, Tooltip } from 'antd'
-import { FC, PropsWithChildren, useState } from 'react'
+import { debounce } from 'lodash'
+import { FC, PropsWithChildren, useCallback, useEffect, useState } from 'react'
 import { useTranslation } from 'react-i18next'
 import styled from 'styled-components'
 
@@ -14,29 +15,26 @@ interface Props {
 const PopoverContent: FC<Props> = ({ assistant }) => {
   const { updateAssistant } = useAssistants()
   const [temperature, setTemperature] = useState(assistant.settings?.temperature ?? DEFAULT_TEMPERATURE)
-  const [maxTokens, setMaxTokens] = useState(assistant.settings?.maxTokens ?? DEFAULT_MAXTOKENS)
   const [contextCount, setConextCount] = useState(assistant.settings?.contextCount ?? DEFAULT_CONEXTCOUNT)
   const { t } = useTranslation()
 
-  const onUpdateAssistantSettings = ({
-    _temperature,
-    _maxTokens,
-    _contextCount
-  }: {
-    _temperature?: number
-    _maxTokens?: number
-    _contextCount?: number
-  }) => {
-    updateAssistant({
-      ...assistant,
-      settings: {
-        ...assistant.settings,
-        temperature: _temperature ?? temperature,
-        maxTokens: _maxTokens ?? maxTokens,
-        contextCount: _contextCount ?? contextCount
-      }
-    })
-  }
+  const onUpdateAssistantSettings = useCallback(
+    debounce(
+      ({ _temperature, _contextCount }: { _temperature?: number; _contextCount?: number }) => {
+        updateAssistant({
+          ...assistant,
+          settings: {
+            ...assistant.settings,
+            temperature: _temperature ?? temperature,
+            contextCount: _contextCount ?? contextCount
+          }
+        })
+      },
+      1000,
+      { leading: false, trailing: true }
+    ),
+    []
+  )
 
   const onTemperatureChange = (value) => {
     if (!isNaN(value as number)) {
@@ -45,13 +43,6 @@ const PopoverContent: FC<Props> = ({ assistant }) => {
     }
   }
 
-  const onMaxTokensChange = (value) => {
-    if (!isNaN(value as number)) {
-      setMaxTokens(value)
-      onUpdateAssistantSettings({ _maxTokens: value })
-    }
-  }
-
   const onConextCountChange = (value) => {
     if (!isNaN(value as number)) {
       setConextCount(value)
@@ -61,24 +52,27 @@ const PopoverContent: FC<Props> = ({ assistant }) => {
 
   const onReset = () => {
     setTemperature(DEFAULT_TEMPERATURE)
-    setMaxTokens(DEFAULT_MAXTOKENS)
     setConextCount(DEFAULT_CONEXTCOUNT)
     updateAssistant({
       ...assistant,
       settings: {
         ...assistant.settings,
         temperature: DEFAULT_TEMPERATURE,
-        maxTokens: DEFAULT_MAXTOKENS,
         contextCount: DEFAULT_CONEXTCOUNT
       }
     })
   }
 
+  useEffect(() => {
+    setTemperature(assistant.settings?.temperature ?? DEFAULT_TEMPERATURE)
+    setConextCount(assistant.settings?.contextCount ?? DEFAULT_CONEXTCOUNT)
+  }, [assistant])
+
   return (
     <Container>
       <Row align="middle" style={{ marginBottom: 10 }} gutter={20}>
-        <Col span={5}>
-          <Row align="middle">
+        <Col span={6}>
+          <Row align="middle" justify="end">
             <Label>{t('assistant.settings.temperature')}</Label>
             <Tooltip title={t('assistant.settings.temperature.tip')}>
               <QuestionIcon />
@@ -95,11 +89,11 @@ const PopoverContent: FC<Props> = ({ assistant }) => {
             step={0.1}
           />
         </Col>
-        <Col span={4}>
+        <Col span={3}>
           <InputNumber
             min={0}
             max={1.2}
-            style={{ width: 70, marginLeft: 5, textAlign: 'center' }}
+            style={{ width: 50, marginLeft: 5, textAlign: 'center' }}
             step={0.1}
             value={temperature}
             onChange={onTemperatureChange}
@@ -108,8 +102,8 @@ const PopoverContent: FC<Props> = ({ assistant }) => {
         </Col>
       </Row>
       <Row align="middle" style={{ marginBottom: 10 }} gutter={20}>
-        <Col span={5}>
-          <Row align="middle">
+        <Col span={6}>
+          <Row align="middle" justify="end">
             <Label>{t('assistant.settings.conext_count')}</Label>
             <Tooltip title={t('assistant.settings.conext_count.tip')}>
               <QuestionIcon />
@@ -126,11 +120,11 @@ const PopoverContent: FC<Props> = ({ assistant }) => {
             step={1}
           />
         </Col>
-        <Col span={4}>
+        <Col span={3}>
           <InputNumber
             min={0}
             max={20}
-            style={{ width: 70, marginLeft: 5, textAlign: 'center' }}
+            style={{ width: 50, marginLeft: 5, textAlign: 'center' }}
             step={1}
             value={contextCount}
             onChange={onConextCountChange}
@@ -138,41 +132,8 @@ const PopoverContent: FC<Props> = ({ assistant }) => {
           />
         </Col>
       </Row>
-      <Row align="middle" gutter={20}>
-        <Col span={5}>
-          <Row align="middle">
-            <Label>{t('assistant.settings.max_tokens')}</Label>
-            <Tooltip title={t('assistant.settings.max_tokens.tip')}>
-              <QuestionIcon />
-            </Tooltip>
-          </Row>
-        </Col>
-        <Col span={14}>
-          <Slider
-            min={0}
-            max={5000}
-            onChange={onMaxTokensChange}
-            value={typeof maxTokens === 'number' ? maxTokens : 0}
-            marks={{ 0: '0', 800: '800', 2000: '2000', 3600: '3600', 5000: t('assistant.settings.max') }}
-            step={64}
-          />
-        </Col>
-        <Col span={4}>
-          <InputNumber
-            min={0}
-            max={5000}
-            style={{ width: 70, marginLeft: 5, textAlign: 'center' }}
-            step={64}
-            value={maxTokens}
-            onChange={onMaxTokensChange}
-            controls={false}
-          />
-        </Col>
-      </Row>
-      <Row justify="center" style={{ marginTop: 10 }}>
-        <Button onClick={onReset} style={{ marginRight: 10 }}>
-          {t('assistant.settings.reset')}
-        </Button>
+      <Row justify="center">
+        <Button onClick={onReset}>{t('assistant.settings.reset')}</Button>
       </Row>
     </Container>
   )
@@ -199,7 +160,7 @@ const Container = styled.div`
   display: flex;
   flex-direction: column;
   margin-bottom: 8px;
-  width: 500px;
+  width: 420px;
   padding: 5px;
 `
 
diff --git a/src/renderer/src/pages/home/components/Assistants.tsx b/src/renderer/src/pages/home/components/Assistants.tsx
index a515e54ee..846cc80cd 100644
--- a/src/renderer/src/pages/home/components/Assistants.tsx
+++ b/src/renderer/src/pages/home/components/Assistants.tsx
@@ -24,11 +24,9 @@ const Assistants: FC<Props> = ({ activeAssistant, setActiveAssistant, onCreateAs
   const { t } = useTranslation()
 
   const onDelete = (assistant: Assistant) => {
+    const _assistant = last(assistants.filter((a) => a.id !== assistant.id))
+    _assistant ? setActiveAssistant(_assistant) : onCreateAssistant()
     removeAssistant(assistant.id)
-    setTimeout(() => {
-      const _assistant = last(assistants.filter((a) => a.id !== assistant.id))
-      _assistant ? setActiveAssistant(_assistant) : onCreateAssistant()
-    }, 0)
   }
 
   const items: MenuProps['items'] = [
diff --git a/src/renderer/src/pages/home/components/Chat.tsx b/src/renderer/src/pages/home/components/Chat.tsx
index 6fbf70031..b2e8eb66e 100644
--- a/src/renderer/src/pages/home/components/Chat.tsx
+++ b/src/renderer/src/pages/home/components/Chat.tsx
@@ -1,5 +1,5 @@
-import { Assistant, Message } from '@renderer/types'
-import { FC, useRef } from 'react'
+import { Assistant } from '@renderer/types'
+import { FC } from 'react'
 import styled from 'styled-components'
 import Inputbar from './Inputbar'
 import Messages from './Messages'
@@ -15,17 +15,12 @@ interface Props {
 const Chat: FC<Props> = (props) => {
   const { assistant } = useAssistant(props.assistant.id)
   const { activeTopic, setActiveTopic } = useActiveTopic(assistant)
-  const messagesRef = useRef<Message[]>([])
-
-  if (!assistant) {
-    return null
-  }
 
   return (
     <Container id="chat">
       <Flex vertical flex={1} justify="space-between">
-        <Messages assistant={assistant} topic={activeTopic} messagesRef={messagesRef} />
-        <Inputbar assistant={assistant} setActiveTopic={setActiveTopic} messagesRef={messagesRef} />
+        <Messages assistant={assistant} topic={activeTopic} />
+        <Inputbar assistant={assistant} setActiveTopic={setActiveTopic} />
       </Flex>
       <Topics assistant={assistant} activeTopic={activeTopic} setActiveTopic={setActiveTopic} />
     </Container>
diff --git a/src/renderer/src/pages/home/components/Inputbar.tsx b/src/renderer/src/pages/home/components/Inputbar.tsx
index b111d4bbd..6f352875a 100644
--- a/src/renderer/src/pages/home/components/Inputbar.tsx
+++ b/src/renderer/src/pages/home/components/Inputbar.tsx
@@ -1,7 +1,7 @@
 import { EVENT_NAMES, EventEmitter } from '@renderer/services/event'
 import { Assistant, Message, Topic } from '@renderer/types'
-import { estimateTokenCount, uuid } from '@renderer/utils'
-import { FC, MutableRefObject, useCallback, useEffect, useRef, useState } from 'react'
+import { estimateInputTokenCount, uuid } from '@renderer/utils'
+import { FC, useCallback, useEffect, useMemo, useRef, useState } from 'react'
 import styled from 'styled-components'
 import { MoreOutlined } from '@ant-design/icons'
 import { Button, Popconfirm, Tooltip } from 'antd'
@@ -9,15 +9,15 @@ import { useShowRightSidebar } from '@renderer/hooks/useStore'
 import { useAssistant } from '@renderer/hooks/useAssistant'
 import {
   ClearOutlined,
+  ControlOutlined,
   FullscreenExitOutlined,
   FullscreenOutlined,
   HistoryOutlined,
   PauseCircleOutlined,
-  PlusCircleOutlined,
-  SettingOutlined
+  PlusCircleOutlined
 } from '@ant-design/icons'
 import TextArea, { TextAreaRef } from 'antd/es/input/TextArea'
-import { isEmpty } from 'lodash'
+import { debounce, isEmpty } from 'lodash'
 import SendMessageSetting from './SendMessageSetting'
 import { useSettings } from '@renderer/hooks/useSettings'
 import dayjs from 'dayjs'
@@ -30,15 +30,15 @@ import AssistantSettings from './AssistantSettings'
 interface Props {
   assistant: Assistant
   setActiveTopic: (topic: Topic) => void
-  messagesRef: MutableRefObject<Message[]>
 }
 
-const Inputbar: FC<Props> = ({ assistant, setActiveTopic, messagesRef }) => {
+const Inputbar: FC<Props> = ({ assistant, setActiveTopic }) => {
   const [text, setText] = useState('')
   const { setShowRightSidebar } = useShowRightSidebar()
   const { addTopic } = useAssistant(assistant.id)
   const { sendMessageShortcut } = useSettings()
   const [expended, setExpend] = useState(false)
+  const [estimateTokenCount, setEstimateTokenCount] = useState(0)
   const generating = useAppSelector((state) => state.runtime.generating)
   const inputRef = useRef<TextAreaRef>(null)
 
@@ -68,6 +68,8 @@ const Inputbar: FC<Props> = ({ assistant, setActiveTopic, messagesRef }) => {
     setText('')
   }
 
+  const inputTokenCount = useMemo(() => estimateInputTokenCount(text), [text])
+
   const handleKeyDown = (event: React.KeyboardEvent<HTMLTextAreaElement>) => {
     if (sendMessageShortcut === 'Enter' && event.key === 'Enter') {
       if (event.shiftKey) {
@@ -96,8 +98,6 @@ const Inputbar: FC<Props> = ({ assistant, setActiveTopic, messagesRef }) => {
     store.dispatch(setGenerating(false))
   }
 
-  const textCount = text.length === 0 ? '' : (text: string) => estimateTokenCount(text, assistant, messagesRef.current)
-
   // Command or Ctrl + N create new topic
   useEffect(() => {
     const onKeydown = (e) => {
@@ -113,11 +113,13 @@ const Inputbar: FC<Props> = ({ assistant, setActiveTopic, messagesRef }) => {
   }, [addNewTopic, generating])
 
   useEffect(() => {
+    const _setEstimateTokenCount = debounce(setEstimateTokenCount, 100, { leading: false, trailing: true })
     const unsubscribes = [
       EventEmitter.on(EVENT_NAMES.EDIT_MESSAGE, (message: Message) => {
         setText(message.content)
         inputRef.current?.focus()
-      })
+      }),
+      EventEmitter.on(EVENT_NAMES.ESTIMATED_TOKEN_COUNT, _setEstimateTokenCount)
     ]
     return () => unsubscribes.forEach((unsub) => unsub())
   }, [])
@@ -155,7 +157,7 @@ const Inputbar: FC<Props> = ({ assistant, setActiveTopic, messagesRef }) => {
           </Tooltip>
           <AssistantSettings assistant={assistant}>
             <ToolbarButton type="text">
-              <SettingOutlined />
+              <ControlOutlined />
             </ToolbarButton>
           </AssistantSettings>
           <Tooltip placement="top" title={expended ? t('assistant.input.collapse') : t('assistant.input.expand')} arrow>
@@ -188,19 +190,12 @@ const Inputbar: FC<Props> = ({ assistant, setActiveTopic, messagesRef }) => {
         contextMenu="true"
         variant="borderless"
         showCount
-        count={{ strategy: textCount }}
         ref={inputRef}
-        styles={{
-          textarea: { paddingLeft: 0 },
-          count: {
-            position: 'absolute',
-            right: 5,
-            bottom: 5,
-            fontSize: 11,
-            display: text.length === 0 ? 'none' : 'block'
-          }
-        }}
+        styles={{ textarea: { paddingLeft: 0 } }}
       />
+      <TextCount>
+        {t('assistant.input.estimated_tokens')}: {`${inputTokenCount}/${estimateTokenCount}`}
+      </TextCount>
     </Container>
   )
 }
@@ -213,6 +208,7 @@ const Container = styled.div`
   border-top: 0.5px solid var(--color-border);
   padding: 5px 15px;
   transition: all 0.3s ease;
+  position: relative;
 `
 
 const Textarea = styled(TextArea)`
@@ -256,4 +252,12 @@ const ToolbarButton = styled(Button)`
   }
 `
 
+const TextCount = styled.div`
+  position: absolute;
+  right: 8px;
+  bottom: 8px;
+  font-size: 11px;
+  color: var(--color-text-3);
+`
+
 export default Inputbar
diff --git a/src/renderer/src/pages/home/components/Message.tsx b/src/renderer/src/pages/home/components/Message.tsx
index 068ae323b..39d4cd1bd 100644
--- a/src/renderer/src/pages/home/components/Message.tsx
+++ b/src/renderer/src/pages/home/components/Message.tsx
@@ -104,8 +104,8 @@ const MessageItem: FC<Props> = ({ message, index, showMenu, onDeleteMessage }) =
             <MessageMetadata>{message.modelId}</MessageMetadata>
             {message.usage && (
               <>
-                <MessageMetadata style={{ textTransform: 'uppercase' }}>
-                  tokens used: {message.usage.total_tokens} (IN:{message.usage.prompt_tokens}/OUT:
+                <MessageMetadata>
+                  Tokens: {message.usage.total_tokens} (IN:{message.usage.prompt_tokens}/OUT:
                   {message.usage.completion_tokens})
                 </MessageMetadata>
               </>
diff --git a/src/renderer/src/pages/home/components/Messages.tsx b/src/renderer/src/pages/home/components/Messages.tsx
index 0461dd5f7..4b34ed875 100644
--- a/src/renderer/src/pages/home/components/Messages.tsx
+++ b/src/renderer/src/pages/home/components/Messages.tsx
@@ -1,13 +1,13 @@
 import { EVENT_NAMES, EventEmitter } from '@renderer/services/event'
 import { Assistant, Message, Topic } from '@renderer/types'
 import localforage from 'localforage'
-import { FC, MutableRefObject, useCallback, useEffect, useRef, useState } from 'react'
+import { FC, useCallback, useEffect, useRef, useState } from 'react'
 import styled from 'styled-components'
 import MessageItem from './Message'
 import { reverse } from 'lodash'
 import { fetchChatCompletion, fetchMessagesSummary } from '@renderer/services/api'
 import { useAssistant } from '@renderer/hooks/useAssistant'
-import { runAsyncFunction } from '@renderer/utils'
+import { estimateHistoryTokenCount, runAsyncFunction } from '@renderer/utils'
 import LocalStorage from '@renderer/services/storage'
 import { useProviderByAssistant } from '@renderer/hooks/useProvider'
 import { t } from 'i18next'
@@ -15,10 +15,9 @@ import { t } from 'i18next'
 interface Props {
   assistant: Assistant
   topic: Topic
-  messagesRef: MutableRefObject<Message[]>
 }
 
-const Messages: FC<Props> = ({ assistant, topic, messagesRef }) => {
+const Messages: FC<Props> = ({ assistant, topic }) => {
   const [messages, setMessages] = useState<Message[]>([])
   const [lastMessage, setLastMessage] = useState<Message | null>(null)
   const { updateTopic } = useAssistant(assistant.id)
@@ -97,8 +96,11 @@ const Messages: FC<Props> = ({ assistant, topic, messagesRef }) => {
 
   useEffect(() => {
     containerRef.current?.scrollTo({ top: 100000, behavior: 'auto' })
-    messagesRef.current = messages
-  }, [messages, messagesRef])
+  }, [messages])
+
+  useEffect(() => {
+    EventEmitter.emit(EVENT_NAMES.ESTIMATED_TOKEN_COUNT, estimateHistoryTokenCount(assistant, messages))
+  }, [assistant, messages])
 
   return (
     <Container id="messages" key={assistant.id} ref={containerRef}>
diff --git a/src/renderer/src/pages/home/components/Topics.tsx b/src/renderer/src/pages/home/components/Topics.tsx
index 469c29a5a..b7882202d 100644
--- a/src/renderer/src/pages/home/components/Topics.tsx
+++ b/src/renderer/src/pages/home/components/Topics.tsx
@@ -82,12 +82,8 @@ const Topics: FC<Props> = ({ assistant, activeTopic, setActiveTopic }) => {
     }
   }
 
-  if (!showRightSidebar) {
-    return null
-  }
-
   return (
-    <Container className={showRightSidebar ? '' : 'collapsed'}>
+    <Container style={{ display: showRightSidebar ? 'block' : 'none' }}>
       <TopicTitle>
         <span>
           {t('assistant.topics.title')} ({assistant.topics.length})
diff --git a/src/renderer/src/pages/settings/AssistantSettings.tsx b/src/renderer/src/pages/settings/AssistantSettings.tsx
index 01b93f273..551f46e92 100644
--- a/src/renderer/src/pages/settings/AssistantSettings.tsx
+++ b/src/renderer/src/pages/settings/AssistantSettings.tsx
@@ -1,40 +1,38 @@
 import { QuestionCircleOutlined } from '@ant-design/icons'
-import { DEFAULT_CONEXTCOUNT, DEFAULT_MAXTOKENS, DEFAULT_TEMPERATURE } from '@renderer/config/constant'
+import { DEFAULT_CONEXTCOUNT, DEFAULT_TEMPERATURE } from '@renderer/config/constant'
 import { useDefaultAssistant } from '@renderer/hooks/useAssistant'
 import { Button, Col, Input, InputNumber, Row, Slider, Tooltip } from 'antd'
 import TextArea from 'antd/es/input/TextArea'
-import { FC, useState } from 'react'
+import { FC, useCallback, useState } from 'react'
 import { useTranslation } from 'react-i18next'
 import styled from 'styled-components'
 import { SettingContainer, SettingDivider, SettingSubtitle, SettingTitle } from './components'
+import { debounce } from 'lodash'
 
 const AssistantSettings: FC = () => {
   const { defaultAssistant, updateDefaultAssistant } = useDefaultAssistant()
-  const [temperature, setTemperature] = useState(defaultAssistant.settings?.temperature || DEFAULT_TEMPERATURE)
-  const [maxTokens, setMaxTokens] = useState(defaultAssistant.settings?.maxTokens || DEFAULT_MAXTOKENS)
-  const [contextCount, setConextCount] = useState(defaultAssistant.settings?.contextCount || DEFAULT_CONEXTCOUNT)
+  const [temperature, setTemperature] = useState(defaultAssistant.settings?.temperature ?? DEFAULT_TEMPERATURE)
+  const [contextCount, setConextCount] = useState(defaultAssistant.settings?.contextCount ?? DEFAULT_CONEXTCOUNT)
 
   const { t } = useTranslation()
 
-  const onUpdateAssistantSettings = ({
-    _temperature,
-    _maxTokens,
-    _contextCount
-  }: {
-    _temperature?: number
-    _maxTokens?: number
-    _contextCount?: number
-  }) => {
-    updateDefaultAssistant({
-      ...defaultAssistant,
-      settings: {
-        ...defaultAssistant.settings,
-        temperature: _temperature || temperature,
-        maxTokens: _maxTokens || maxTokens,
-        contextCount: _contextCount || contextCount
-      }
-    })
-  }
+  const onUpdateAssistantSettings = useCallback(
+    debounce(
+      ({ _temperature, _contextCount }: { _temperature?: number; _contextCount?: number }) => {
+        updateDefaultAssistant({
+          ...defaultAssistant,
+          settings: {
+            ...defaultAssistant.settings,
+            temperature: _temperature ?? temperature,
+            contextCount: _contextCount ?? contextCount
+          }
+        })
+      },
+      1000,
+      { leading: false, trailing: true }
+    ),
+    []
+  )
 
   const onTemperatureChange = (value) => {
     if (!isNaN(value as number)) {
@@ -43,13 +41,6 @@ const AssistantSettings: FC = () => {
     }
   }
 
-  const onMaxTokensChange = (value) => {
-    if (!isNaN(value as number)) {
-      setMaxTokens(value)
-      onUpdateAssistantSettings({ _maxTokens: value })
-    }
-  }
-
   const onConextCountChange = (value) => {
     if (!isNaN(value as number)) {
       setConextCount(value)
@@ -59,14 +50,12 @@ const AssistantSettings: FC = () => {
 
   const onReset = () => {
     setTemperature(DEFAULT_TEMPERATURE)
-    setMaxTokens(DEFAULT_MAXTOKENS)
     setConextCount(DEFAULT_CONEXTCOUNT)
     updateDefaultAssistant({
       ...defaultAssistant,
       settings: {
         ...defaultAssistant.settings,
         temperature: DEFAULT_TEMPERATURE,
-        maxTokens: DEFAULT_MAXTOKENS,
         contextCount: DEFAULT_CONEXTCOUNT
       }
     })
@@ -147,35 +136,7 @@ const AssistantSettings: FC = () => {
           />
         </Col>
       </Row>
-      <Row align="middle">
-        <Label>{t('assistant.settings.max_tokens')}</Label>
-        <Tooltip title={t('assistant.settings.max_tokens.tip')}>
-          <QuestionIcon />
-        </Tooltip>
-      </Row>
-      <Row align="middle" gutter={20}>
-        <Col span={22}>
-          <Slider
-            min={0}
-            max={5000}
-            onChange={onMaxTokensChange}
-            value={typeof maxTokens === 'number' ? maxTokens : 0}
-            marks={{ 0: '0', 800: '800', 2000: '2000', 3600: '3600', 5000: t('assistant.settings.max') }}
-            step={64}
-          />
-        </Col>
-        <Col span={2}>
-          <InputNumber
-            min={0}
-            max={5000}
-            step={100}
-            value={maxTokens}
-            onChange={onMaxTokensChange}
-            style={{ width: '100%' }}
-          />
-        </Col>
-      </Row>
-      <Button onClick={onReset} style={{ width: 100, marginTop: 20 }}>
+      <Button onClick={onReset} style={{ width: 100 }}>
         {t('assistant.settings.reset')}
       </Button>
     </SettingContainer>
diff --git a/src/renderer/src/services/ProviderSDK.ts b/src/renderer/src/services/ProviderSDK.ts
index a770366a8..038a43ecb 100644
--- a/src/renderer/src/services/ProviderSDK.ts
+++ b/src/renderer/src/services/ProviderSDK.ts
@@ -32,11 +32,11 @@ export default class ProviderSDK {
   ) {
     const defaultModel = getDefaultModel()
     const model = assistant.model || defaultModel
-    const { contextCount, maxTokens } = getAssistantSettings(assistant)
+    const { contextCount } = getAssistantSettings(assistant)
 
     const systemMessage = assistant.prompt ? { role: 'system', content: assistant.prompt } : undefined
 
-    const userMessages = takeRight(messages, contextCount).map((message) => ({
+    const userMessages = takeRight(messages, contextCount + 1).map((message) => ({
       role: message.role,
       content: message.content
     }))
@@ -46,7 +46,7 @@ export default class ProviderSDK {
         .stream({
           model: model.id,
           messages: [systemMessage, ...userMessages].filter(Boolean) as MessageParam[],
-          max_tokens: assistant.settings?.maxTokens || maxTokens,
+          max_tokens: 4096,
           temperature: assistant.settings?.temperature
         })
         .on('text', (text) => onChunk({ text: text || '' }))
@@ -64,7 +64,6 @@ export default class ProviderSDK {
         model: model.id,
         messages: [systemMessage, ...userMessages].filter(Boolean) as ChatCompletionMessageParam[],
         stream: true,
-        max_tokens: assistant.settings?.maxTokens,
         temperature: assistant.settings?.temperature
       })
       for await (const chunk of stream) {
diff --git a/src/renderer/src/services/event.ts b/src/renderer/src/services/event.ts
index 9750439f6..15b7ac48a 100644
--- a/src/renderer/src/services/event.ts
+++ b/src/renderer/src/services/event.ts
@@ -10,5 +10,6 @@ export const EVENT_NAMES = {
   ADD_ASSISTANT: 'ADD_ASSISTANT',
   EDIT_MESSAGE: 'EDIT_MESSAGE',
   REGENERATE_MESSAGE: 'REGENERATE_MESSAGE',
-  CHAT_COMPLETION_PAUSED: 'CHAT_COMPLETION_PAUSED'
+  CHAT_COMPLETION_PAUSED: 'CHAT_COMPLETION_PAUSED',
+  ESTIMATED_TOKEN_COUNT: 'ESTIMATED_TOKEN_COUNT'
 }
diff --git a/src/renderer/src/types/index.ts b/src/renderer/src/types/index.ts
index cf5a7cd0d..ac804885b 100644
--- a/src/renderer/src/types/index.ts
+++ b/src/renderer/src/types/index.ts
@@ -13,7 +13,6 @@ export type Assistant = {
 export type AssistantSettings = {
   contextCount: number
   temperature: number
-  maxTokens: number
 }
 
 export type Message = {
diff --git a/src/renderer/src/utils/index.ts b/src/renderer/src/utils/index.ts
index a48014fc7..03c97af99 100644
--- a/src/renderer/src/utils/index.ts
+++ b/src/renderer/src/utils/index.ts
@@ -2,8 +2,8 @@ import { v4 as uuidv4 } from 'uuid'
 import imageCompression from 'browser-image-compression'
 import { Assistant, AssistantSettings, Message, Model } from '@renderer/types'
 import { GPTTokens } from 'gpt-tokens'
-import { DEFAULT_CONEXTCOUNT, DEFAULT_MAXTOKENS, DEFAULT_TEMPERATURE } from '@renderer/config/constant'
-import { take } from 'lodash'
+import { DEFAULT_CONEXTCOUNT, DEFAULT_TEMPERATURE } from '@renderer/config/constant'
+import { takeRight } from 'lodash'
 
 export const runAsyncFunction = async (fn: () => void) => {
   await fn()
@@ -169,31 +169,32 @@ export function getFirstCharacter(str) {
 }
 
 export const getAssistantSettings = (assistant: Assistant): AssistantSettings => {
+  const contextCount = assistant.settings?.contextCount ?? DEFAULT_CONEXTCOUNT
   return {
-    contextCount: assistant.settings?.contextCount ?? DEFAULT_CONEXTCOUNT,
-    temperature: assistant.settings?.temperature ?? DEFAULT_TEMPERATURE,
-    maxTokens: assistant.settings?.maxTokens ?? DEFAULT_MAXTOKENS
+    contextCount: contextCount === 20 ? 100000 : contextCount,
+    temperature: assistant.settings?.temperature ?? DEFAULT_TEMPERATURE
   }
 }
 
-export function estimateTokenCount(text: string, assistant: Assistant, msgs: Message[]) {
-  const { contextCount } = getAssistantSettings(assistant)
-
-  console.debug('contextCount', contextCount)
-
+export function estimateInputTokenCount(text: string) {
   const input = new GPTTokens({
     model: 'gpt-4o',
     messages: [{ role: 'user', content: text }]
   })
 
+  return input.usedTokens - 7
+}
+
+export function estimateHistoryTokenCount(assistant: Assistant, msgs: Message[]) {
+  const { contextCount } = getAssistantSettings(assistant)
+
   const all = new GPTTokens({
     model: 'gpt-4o',
     messages: [
       { role: 'system', content: assistant.prompt },
-      { role: 'user', content: text },
-      ...take(msgs, contextCount).map((message) => ({ role: message.role, content: message.content }))
+      ...takeRight(msgs, contextCount).map((message) => ({ role: message.role, content: message.content }))
     ]
   })
 
-  return `Token ${input.usedTokens - 7} / ${all.usedTokens}` as unknown as number
+  return all.usedTokens - 7
 }