diff --git a/api/buffer.go b/api/buffer.go
index 8e4872b..42c634c 100644
--- a/api/buffer.go
+++ b/api/buffer.go
@@ -3,23 +3,24 @@ package api
 import (
 	"chat/auth"
 	"chat/types"
-	"chat/utils"
 )
 
 type Buffer struct {
-	Enable bool    `json:"enable"`
+	Model  string  `json:"model"`
 	Quota  float32 `json:"quota"`
 	Data   string  `json:"data"`
 	Cursor int     `json:"cursor"`
 	Times  int     `json:"times"`
 }
 
-func NewBuffer(enable bool, history []types.ChatGPTMessage) *Buffer {
-	buffer := &Buffer{Data: "", Cursor: 0, Times: 0, Enable: enable}
-	if enable {
-		buffer.Quota = auth.CountInputToken(utils.CountTokenPrice(history))
+func NewBuffer(model string, history []types.ChatGPTMessage) *Buffer {
+	return &Buffer{
+		Data:   "",
+		Cursor: 0,
+		Times:  0,
+		Model:  model,
+		Quota:  auth.CountInputToken(model, history),
 	}
-	return buffer
 }
 
 func (b *Buffer) GetCursor() int {
@@ -27,10 +28,7 @@ func (b *Buffer) GetCursor() int {
 }
 
 func (b *Buffer) GetQuota() float32 {
-	if !b.Enable {
-		return 0.
-	}
-	return b.Quota + auth.CountOutputToken(b.ReadTimes())
+	return b.Quota + auth.CountOutputToken(b.Model, b.ReadTimes())
 }
 
 func (b *Buffer) Write(data string) string {
diff --git a/api/chat.go b/api/chat.go
index 0b66fa5..da084ad 100644
--- a/api/chat.go
+++ b/api/chat.go
@@ -29,15 +29,15 @@ func SendSegmentMessage(conn *websocket.Conn, message interface{}) {
 	_ = conn.WriteMessage(websocket.TextMessage, []byte(utils.ToJson(message)))
 }
 
-func GetErrorQuota(isGPT4 bool) float32 {
-	if isGPT4 {
+func GetErrorQuota(model string) float32 {
+	if types.IsGPT4Model(model) {
 		return -0xe // special value for error
 	} else {
 		return 0
 	}
 }
 
-func TextChat(db *sql.DB, cache *redis.Client, user *auth.User, conn *websocket.Conn, instance *conversation.Conversation) string {
+func GetTextSegment(instance *conversation.Conversation) (string, []types.ChatGPTMessage) {
 	var keyword string
 	var segment []types.ChatGPTMessage
 
@@ -46,11 +46,16 @@ func TextChat(db *sql.DB, cache *redis.Client, user *auth.User, conn *websocket.
 	} else {
 		segment = conversation.CopyMessage(instance.GetMessageSegment(12))
 	}
+	return keyword, segment
+}
 
+func TextChat(db *sql.DB, cache *redis.Client, user *auth.User, conn *websocket.Conn, instance *conversation.Conversation) string {
+	keyword, segment := GetTextSegment(instance)
 	SendSegmentMessage(conn, types.ChatSegmentResponse{Keyword: keyword, End: false})
 
-	isProPlan := auth.CanEnableSubscription(db, cache, user)
-	if instance.IsEnableGPT4() && (!isProPlan) && (!auth.CanEnableGPT4(db, user)) {
+	model := instance.GetModel()
+	useReverse := auth.CanEnableSubscription(db, cache, user)
+	if !auth.CanEnableModelWithSubscription(db, user, model, useReverse) {
 		SendSegmentMessage(conn, types.ChatSegmentResponse{
 			Message: defaultQuotaMessage,
 			Quota:   0,
@@ -59,9 +64,9 @@ func TextChat(db *sql.DB, cache *redis.Client, user *auth.User, conn *websocket.
 		return defaultQuotaMessage
 	}
 
-	buffer := NewBuffer(instance.IsEnableGPT4(), segment)
-	StreamRequest(instance.IsEnableGPT4(), isProPlan, segment,
-		utils.Multi(instance.IsEnableGPT4() || isProPlan, -1, 2000),
+	buffer := NewBuffer(model, segment)
+	StreamRequest(model, useReverse, segment,
+		utils.Multi(types.IsGPT4Model(model) || useReverse, -1, 2000),
 		func(resp string) {
 			SendSegmentMessage(conn, types.ChatSegmentResponse{
 				Message: buffer.Write(resp),
@@ -70,19 +75,19 @@ func TextChat(db *sql.DB, cache *redis.Client, user *auth.User, conn *websocket.
 			})
 		})
 	if buffer.IsEmpty() {
-		if isProPlan {
+		if useReverse {
 			auth.DecreaseSubscriptionUsage(cache, user)
 		}
 		SendSegmentMessage(conn, types.ChatSegmentResponse{
 			Message: defaultErrorMessage,
-			Quota:   GetErrorQuota(instance.IsEnableGPT4()),
+			Quota:   GetErrorQuota(model),
 			End:     true,
 		})
 		return defaultErrorMessage
 	}
 
 	// collect quota
-	if !isProPlan {
+	if !useReverse {
 		user.UseQuota(db, buffer.GetQuota())
 	}
 	SendSegmentMessage(conn, types.ChatSegmentResponse{End: true, Quota: buffer.GetQuota()})
diff --git a/api/stream.go b/api/stream.go
index f46db29..7013f58 100644
--- a/api/stream.go
+++ b/api/stream.go
@@ -105,14 +105,25 @@ func NativeStreamRequest(model string, endpoint string, apikeys string, messages
 	}
 }
 
-func StreamRequest(enableGPT4 bool, isProPlan bool, messages []types.ChatGPTMessage, token int, callback func(string)) {
-	if enableGPT4 {
-		if isProPlan {
+func StreamRequest(model string, enableReverse bool, messages []types.ChatGPTMessage, token int, callback func(string)) {
+	switch model {
+	case types.GPT4,
+		types.GPT40314,
+		types.GPT40613:
+		if enableReverse {
 			NativeStreamRequest(viper.GetString("openai.reverse"), viper.GetString("openai.pro_endpoint"), viper.GetString("openai.pro"), messages, token, callback)
 		} else {
-			NativeStreamRequest("gpt-4", viper.GetString("openai.gpt4_endpoint"), viper.GetString("openai.gpt4"), messages, token, callback)
+			NativeStreamRequest(model, viper.GetString("openai.gpt4_endpoint"), viper.GetString("openai.gpt4"), messages, token, callback)
 		}
-	} else {
-		NativeStreamRequest("gpt-3.5-turbo-16k-0613", viper.GetString("openai.user_endpoint"), viper.GetString("openai.user"), messages, token, callback)
+	case types.GPT432k,
+		types.GPT432k0613,
+		types.GPT432k0314:
+		NativeStreamRequest(model, viper.GetString("openai.gpt4_endpoint"), viper.GetString("openai.gpt4"), messages, token, callback)
+	case types.GPT3Turbo16k,
+		types.GPT3Turbo16k0301,
+		types.GPT3Turbo16k0613:
+		NativeStreamRequest(types.GPT3Turbo16k, viper.GetString("openai.user_endpoint"), viper.GetString("openai.user"), messages, token, callback)
+	default:
+		NativeStreamRequest(types.GPT3Turbo, viper.GetString("openai.anonymous_endpoint"), viper.GetString("openai.anonymous"), messages, token, callback)
 	}
 }
diff --git a/app/src/i18n.ts b/app/src/i18n.ts
index 688a449..026a363 100644
--- a/app/src/i18n.ts
+++ b/app/src/i18n.ts
@@ -62,7 +62,6 @@ const resources = {
         buy: "Buy {{amount}} points",
         dalle: "DALL·E Image Generator",
         "dalle-free": "5 free quotas per day",
-        gpt4: "GPT-4",
         flex: "Flexible Billing",
         input: "Input",
         output: "Output",
@@ -106,7 +105,7 @@ const resources = {
         "free-web": "web searching feature",
         "free-conversation": "conversation storage",
         "free-api": "API calls",
-        "pro-gpt4": "GPT-4 10 requests per day",
+        "pro-gpt4": "GPT-4 50 requests per day",
         "pro-dalle": "50 quotas per day",
         "pro-service": "Priority Service Support",
         "pro-thread": "Concurrency Increase",
@@ -207,7 +206,6 @@ const resources = {
         buy: "购买 {{amount}} 点数",
         dalle: "DALL·E AI 绘图",
         "dalle-free": "每天 5 次免费绘图配额",
-        gpt4: "GPT-4",
         flex: "灵活计费",
         input: "输入",
         output: "输出",
@@ -250,7 +248,7 @@ const resources = {
         "free-web": "联网搜索功能",
         "free-conversation": "对话存储记录",
         "free-api": "API 调用",
-        "pro-gpt4": "GPT-4 每日请求 10 次",
+        "pro-gpt4": "GPT-4 每日请求 50 次",
         "pro-dalle": "每日 50 次绘图",
         "pro-service": "优先服务支持",
         "pro-thread": "并发数提升",
@@ -354,7 +352,6 @@ const resources = {
         buy: "Купить {{amount}} очков",
         dalle: "Генератор изображений DALL·E",
         "dalle-free": "5 бесплатных квот в день",
-        gpt4: "GPT-4",
         flex: "Гибкая тарификация",
         input: "Вход",
         output: "Выход",
@@ -399,7 +396,7 @@ const resources = {
         "free-web": "веб-поиск",
         "free-conversation": "хранение разговоров",
         "free-api": "API вызовы",
-        "pro-gpt4": "GPT-4 10 запросов в день",
+        "pro-gpt4": "GPT-4 50 запросов в день",
         "pro-dalle": "50 квот в день",
         "pro-service": "Приоритетная служба поддержки",
         "pro-thread": "Увеличение параллелизма",
diff --git a/app/src/routes/Quota.tsx b/app/src/routes/Quota.tsx
index 287f211..ca971e7 100644
--- a/app/src/routes/Quota.tsx
+++ b/app/src/routes/Quota.tsx
@@ -248,7 +248,7 @@ function Quota() {
                   <Separator orientation={`horizontal`} className={`my-2`} />
                   <div className={`product-item`}>
                     <div className={`row title`}>
-                      <div>{t("buy.gpt4")}</div>
+                      <div>GPT-4</div>
                       <div className={`grow`} />
                       <div className={`column`}>
                         <Cloud className={`h-4 w-4`} /> {t("buy.flex")}
@@ -276,6 +276,37 @@ function Quota() {
                         4.3 / 1k token
                       </div>
                     </div>
+                  </div>
+                  <div className={`product-item`}>
+                    <div className={`row title`}>
+                      <div>GPT-4-32K</div>
+                      <div className={`grow`} />
+                      <div className={`column`}>
+                        <Cloud className={`h-4 w-4`} /> {t("buy.flex")}
+                      </div>
+                    </div>
+                    <div className={`row desc`}>
+                      <div className={`column`}>
+                        <HardDriveUpload className={`h-4 w-4`} />
+                        {t("buy.input")}
+                      </div>
+                      <div className={`grow`} />
+                      <div className={`column`}>
+                        <Cloud className={`h-4 w-4`} />
+                        4.2 / 1k token
+                      </div>
+                    </div>
+                    <div className={`row desc`}>
+                      <div className={`column`}>
+                        <HardDriveDownload className={`h-4 w-4`} />
+                        {t("buy.output")}
+                      </div>
+                      <div className={`grow`} />
+                      <div className={`column`}>
+                        <Cloud className={`h-4 w-4`} />
+                        8.6 / 1k token
+                      </div>
+                    </div>
                     <div className={`row desc`}>
                       <div className={`column info`}>
                         <Info className={`h-4 w-4`} />
diff --git a/app/src/routes/Subscription.tsx b/app/src/routes/Subscription.tsx
index cb2e984..e5afe29 100644
--- a/app/src/routes/Subscription.tsx
+++ b/app/src/routes/Subscription.tsx
@@ -46,6 +46,8 @@ import { buySubscription } from "../conversation/addition.ts";
 
 function calc_prize(month: number): number {
   if (month >= 12) {
+    return 8 * month * 0.8;
+  } else if (month >= 6) {
     return 8 * month * 0.9;
   }
   return 8 * month;
@@ -101,17 +103,22 @@ function Upgrade({ children }: UpgradeProps) {
             <SelectContent>
               <SelectItem value={"1"}>{t(`sub.time.1`)}</SelectItem>
               <SelectItem value={"3"}>{t(`sub.time.3`)}</SelectItem>
-              <SelectItem value={"6"}>{t(`sub.time.6`)}</SelectItem>
+              <SelectItem value={"6"}>
+                {t(`sub.time.6`)}
+                <Badge className={`ml-2 cent`}>
+                  {t(`percent`, { cent: 9 })}
+                </Badge>
+              </SelectItem>
               <SelectItem value={"12"}>
                 {t(`sub.time.12`)}
                 <Badge className={`ml-2 cent`}>
-                  {t(`percent`, { cent: 9 })}
+                  {t(`percent`, { cent: 8 })}
                 </Badge>
               </SelectItem>
             </SelectContent>
           </Select>
           <p className={`price`}>
-            {t("sub.price", { price: calc_prize(month) })}
+            {t("sub.price", { price: calc_prize(month).toFixed(2) })}
           </p>
         </div>
         <DialogFooter>
diff --git a/auth/subscription.go b/auth/subscription.go
index 4bc3db6..c749aca 100644
--- a/auth/subscription.go
+++ b/auth/subscription.go
@@ -29,7 +29,7 @@ func BuySubscription(db *sql.DB, user *User, month int) bool {
 
 func IncreaseSubscriptionUsage(cache *redis.Client, user *User) bool {
 	today := time.Now().Format("2006-01-02")
-	return utils.IncrWithLimit(cache, fmt.Sprintf(":subscription-usage:%s:%d", today, user.ID), 1, 999, 60*60*24) // 1 day
+	return utils.IncrWithLimit(cache, fmt.Sprintf(":subscription-usage:%s:%d", today, user.ID), 1, 50, 60*60*24) // 1 day
 }
 
 func DecreaseSubscriptionUsage(cache *redis.Client, user *User) bool {
diff --git a/auth/usage.go b/auth/usage.go
index 3f66f6b..567fcfb 100644
--- a/auth/usage.go
+++ b/auth/usage.go
@@ -1,6 +1,8 @@
 package auth
 
 import (
+	"chat/types"
+	"chat/utils"
 	"database/sql"
 )
 
@@ -13,18 +15,46 @@ import (
 // $0.03 	/ 1K tokens		$0.06 	/ 1K tokens
 // ￥0.21 	/ 1K tokens		￥0.43 	/ 1K tokens
 // 2.1 nio 	/ 1K tokens		4.3 nio / 1K tokens
+//
+// GPT-4 price (32k-context)
+// Input					Output
+// $0.06 	/ 1K tokens		$0.12 	/ 1K tokens
+// ￥0.43 	/ 1K tokens		￥0.86 	/ 1K tokens
+// 4.3 nio 	/ 1K tokens		8.6 nio / 1K tokens
 
 // Dalle price (512x512)
 // $0.018 / per image
 // ￥0.13 / per image
 // 1 nio / per image
 
-func CountInputToken(n int) float32 {
-	return float32(n) / 1000 * 2.1
+func CountInputToken(model string, v []types.ChatGPTMessage) float32 {
+	switch model {
+	case types.GPT3Turbo:
+		return 0
+	case types.GPT3Turbo16k:
+		return 0
+	case types.GPT4:
+		return float32(utils.CountTokenPrice(v, model)) / 1000 * 2.1
+	case types.GPT432k:
+		return float32(utils.CountTokenPrice(v, model)) / 1000 * 2.1 * 2
+	default:
+		return 0
+	}
 }
 
-func CountOutputToken(n int) float32 {
-	return float32(n) / 1000 * 4.3
+func CountOutputToken(model string, t int) float32 {
+	switch model {
+	case types.GPT3Turbo:
+		return 0
+	case types.GPT3Turbo16k:
+		return 0
+	case types.GPT4:
+		return float32(t*utils.GetWeightByModel(model)) / 1000 * 4.3
+	case types.GPT432k:
+		return float32(t*utils.GetWeightByModel(model)) / 1000 * 8.6
+	default:
+		return 0
+	}
 }
 
 func ReduceDalle(db *sql.DB, user *User) bool {
@@ -34,8 +64,24 @@ func ReduceDalle(db *sql.DB, user *User) bool {
 	return user.UseQuota(db, 1)
 }
 
-func CanEnableGPT4(db *sql.DB, user *User) bool {
-	return user.GetQuota(db) >= 5
+func CanEnableModel(db *sql.DB, user *User, model string) bool {
+	switch model {
+	case types.GPT4, types.GPT40613, types.GPT40314:
+		return user.GetQuota(db) >= 5
+	case types.GPT432k, types.GPT432k0613, types.GPT432k0314:
+		return user.GetQuota(db) >= 50
+	default:
+		return true
+	}
+}
+
+func CanEnableModelWithSubscription(db *sql.DB, user *User, model string, useReverse bool) bool {
+	if utils.Contains(model, types.GPT4Array) {
+		if useReverse {
+			return true
+		}
+	}
+	return CanEnableModel(db, user, model)
 }
 
 func BuyQuota(db *sql.DB, user *User, quota int) bool {
diff --git a/conversation/conversation.go b/conversation/conversation.go
index e681a28..1509d22 100644
--- a/conversation/conversation.go
+++ b/conversation/conversation.go
@@ -9,42 +9,42 @@ import (
 )
 
 type Conversation struct {
-	UserID     int64                  `json:"user_id"`
-	Id         int64                  `json:"id"`
-	Name       string                 `json:"name"`
-	Message    []types.ChatGPTMessage `json:"message"`
-	EnableGPT4 bool                   `json:"enable_gpt4"`
-	EnableWeb  bool                   `json:"enable_web"`
+	UserID    int64                  `json:"user_id"`
+	Id        int64                  `json:"id"`
+	Name      string                 `json:"name"`
+	Message   []types.ChatGPTMessage `json:"message"`
+	Model     string                 `json:"model"`
+	EnableWeb bool                   `json:"enable_web"`
 }
 
 type FormMessage struct {
 	Type    string `json:"type"` // ping
 	Message string `json:"message"`
 	Web     bool   `json:"web"`
-	GPT4    bool   `json:"gpt4"`
+	Model   string `json:"model"`
 }
 
 func NewConversation(db *sql.DB, id int64) *Conversation {
 	return &Conversation{
-		UserID:     id,
-		Id:         GetConversationLengthByUserID(db, id) + 1,
-		Name:       "new chat",
-		Message:    []types.ChatGPTMessage{},
-		EnableGPT4: false,
-		EnableWeb:  false,
+		UserID:    id,
+		Id:        GetConversationLengthByUserID(db, id) + 1,
+		Name:      "new chat",
+		Message:   []types.ChatGPTMessage{},
+		Model:     types.GPT3Turbo,
+		EnableWeb: false,
 	}
 }
 
-func (c *Conversation) IsEnableGPT4() bool {
-	return c.EnableGPT4
+func (c *Conversation) GetModel() string {
+	return c.Model
 }
 
 func (c *Conversation) IsEnableWeb() bool {
 	return c.EnableWeb
 }
 
-func (c *Conversation) SetEnableGPT4(enable bool) {
-	c.EnableGPT4 = enable
+func (c *Conversation) SetModel(model string) {
+	c.Model = model
 }
 
 func (c *Conversation) SetEnableWeb(enable bool) {
@@ -141,7 +141,7 @@ func (c *Conversation) AddMessageFromUserForm(data []byte) (string, error) {
 	}
 
 	c.AddMessageFromUser(form.Message)
-	c.SetEnableGPT4(form.GPT4)
+	c.SetModel(form.Model)
 	c.SetEnableWeb(form.Web)
 	return form.Message, nil
 }
diff --git a/generation/api.go b/generation/api.go
index c7cf81c..8caed43 100644
--- a/generation/api.go
+++ b/generation/api.go
@@ -84,7 +84,16 @@ func GenerateAPI(c *gin.Context) {
 		})
 	}
 
-	hash, err := CreateGenerationWithCache(form.Model, form.Prompt, func(data string) {
+	useReverse := auth.CanEnableSubscription(db, cache, user)
+	if !auth.CanEnableModelWithSubscription(db, user, form.Model, useReverse) {
+		api.SendSegmentMessage(conn, types.ChatSegmentResponse{
+			Message: "You don't have enough quota to use this model.",
+			Quota:   0,
+			End:     true,
+		})
+	}
+
+	hash, err := CreateGenerationWithCache(form.Model, form.Prompt, useReverse, func(data string) {
 		api.SendSegmentMessage(conn, types.GenerationSegmentResponse{
 			End:     false,
 			Message: data,
diff --git a/generation/generate.go b/generation/generate.go
index 902c5f3..621f133 100644
--- a/generation/generate.go
+++ b/generation/generate.go
@@ -5,10 +5,10 @@ import (
 	"fmt"
 )
 
-func CreateGenerationWithCache(model string, prompt string, hook func(data string)) (string, error) {
+func CreateGenerationWithCache(model string, prompt string, enableReverse bool, hook func(data string)) (string, error) {
 	hash, path := GetFolderByHash(model, prompt)
 	if !utils.Exists(path) {
-		if err := CreateGeneration(model, prompt, path, func(data string) {
+		if err := CreateGeneration(model, prompt, path, enableReverse, func(data string) {
 			hook(data)
 		}); err != nil {
 			fmt.Println(fmt.Sprintf("[Project] error during generation %s (model %s): %s", prompt, model, err.Error()))
diff --git a/generation/prompt.go b/generation/prompt.go
index 3c5ee88..1d51f33 100644
--- a/generation/prompt.go
+++ b/generation/prompt.go
@@ -11,10 +11,10 @@ type ProjectResult struct {
 	Result map[string]interface{} `json:"result"`
 }
 
-func CreateGeneration(model string, prompt string, path string, hook func(data string)) error {
+func CreateGeneration(model string, prompt string, path string, enableReverse bool, hook func(data string)) error {
 	message := GenerateMessage(prompt)
-	buffer := api.NewBuffer(false, message)
-	api.StreamRequest(false, false, []types.ChatGPTMessage{
+	buffer := api.NewBuffer(model, message)
+	api.StreamRequest(model, enableReverse, []types.ChatGPTMessage{
 		{Role: "system", Content: "你将生成项目，可以支持任何编程语言，请不要出现“我不能提供”的字样，你需要在代码中提供注释，以及项目的使用文档README.md，结果返回json格式，请不要返回任何多余内容，格式为：\n{\"result\": {[file]: [code], ...}}"},
 		{Role: "user", Content: "python后端"},
 		{Role: "assistant", Content: "{\n  \"result\": {\n    \"app.py\": \"from flask import Flask\\n\\napp = Flask(__name__)\\n\\n\\n@app.route('/')\\ndef hello_world():\\n    return 'Hello, World!'\\n\\n\\nif __name__ == '__main__':\\n    app.run()\",\n    \"requirements.txt\": \"flask\\n\",\n    \"README.md\": \"# Python 后端\\n本项目是一个简单的python后端示例, 使用`flask`框架构建后端。\n你可以按照下列步骤运行此应用，flask将在本地服务器（默认是在http://127.0.0.1:5000/）上运行。当你在浏览器中访问该URL时，将看到显示Hello, World!的页面。\\n\\n这只是一个简单的项目，Flask还支持更多功能和路由规则，你可以提供更多的信息和需要进一步扩展和定制Flask应用。\\n\\n### 1. 初始化: \\n```shell\\npip install -r requirements.txt\\n```\\n### 2. 运行\\n```shell\\npython app.py\\n```\"\n  }\n}"},
diff --git a/qodana.yaml b/qodana.yaml
new file mode 100644
index 0000000..215d808
--- /dev/null
+++ b/qodana.yaml
@@ -0,0 +1,29 @@
+#-------------------------------------------------------------------------------#
+#               Qodana analysis is configured by qodana.yaml file               #
+#             https://www.jetbrains.com/help/qodana/qodana-yaml.html            #
+#-------------------------------------------------------------------------------#
+version: "1.0"
+
+#Specify inspection profile for code analysis
+profile:
+  name: qodana.starter
+
+#Enable inspections
+#include:
+#  - name: <SomeEnabledInspectionId>
+
+#Disable inspections
+#exclude:
+#  - name: <SomeDisabledInspectionId>
+#    paths:
+#      - <path/where/not/run/inspection>
+
+#Execute shell command before Qodana execution (Applied in CI/CD pipeline)
+#bootstrap: sh ./prepare-qodana.sh
+
+#Install IDE plugins before Qodana execution (Applied in CI/CD pipeline)
+#plugins:
+#  - id: <plugin.id> #(plugin id can be found at https://plugins.jetbrains.com)
+
+#Specify Qodana linter for analysis (Applied in CI/CD pipeline)
+linter: jetbrains/qodana-go:latest
diff --git a/types/globals.go b/types/globals.go
new file mode 100644
index 0000000..3570a6a
--- /dev/null
+++ b/types/globals.go
@@ -0,0 +1,51 @@
+package types
+
+import "chat/utils"
+
+const (
+	GPT3Turbo        = "gpt-3.5-turbo"
+	GPT3Turbo0613    = "gpt-3.5-turbo-0613"
+	GPT3Turbo0301    = "gpt-3.5-turbo-0301"
+	GPT3Turbo16k     = "gpt-3.5-turbo-16k"
+	GPT3Turbo16k0613 = "gpt-3.5-turbo-16k-0613"
+	GPT3Turbo16k0301 = "gpt-3.5-turbo-16k-0301"
+	GPT4             = "gpt-4"
+	GPT40314         = "gpt-4-0314"
+	GPT40613         = "gpt-4-0613"
+	GPT432k          = "gpt-4-32k"
+	GPT432k0314      = "gpt-4-32k-0314"
+	GPT432k0613      = "gpt-4-32k-0613"
+	Dalle            = "dalle"
+)
+
+var GPT3TurboArray = []string{
+	GPT3Turbo,
+	GPT3Turbo0613,
+	GPT3Turbo0301,
+}
+
+var GPT3Turbo16kArray = []string{
+	GPT3Turbo16k,
+	GPT3Turbo16k0613,
+	GPT3Turbo16k0301,
+}
+
+var GPT4Array = []string{
+	GPT4,
+	GPT40314,
+	GPT40613,
+}
+
+var GPT432kArray = []string{
+	GPT432k,
+	GPT432k0314,
+	GPT432k0613,
+}
+
+func IsGPT4Model(model string) bool {
+	return utils.Contains(model, GPT4Array) || utils.Contains(model, GPT432kArray)
+}
+
+func IsGPT3TurboModel(model string) bool {
+	return utils.Contains(model, GPT3TurboArray) || utils.Contains(model, GPT3Turbo16kArray)
+}
diff --git a/utils/tokenizer.go b/utils/tokenizer.go
index 5bac7d7..44d8e5c 100644
--- a/utils/tokenizer.go
+++ b/utils/tokenizer.go
@@ -13,22 +13,29 @@ import (
 
 func GetWeightByModel(model string) int {
 	switch model {
-	case "gpt-3.5-turbo-0613",
-		"gpt-3.5-turbo-16k-0613",
-		"gpt-4-0314",
-		"gpt-4-32k-0314",
-		"gpt-4-0613",
-		"gpt-4-32k-0613":
+	case types.GPT432k,
+		types.GPT432k0613,
+		types.GPT432k0314:
+		return 3 * 10
+	case types.GPT3Turbo,
+		types.GPT3Turbo0613,
+
+		types.GPT3Turbo16k,
+		types.GPT3Turbo16k0613,
+
+		types.GPT4,
+		types.GPT40314,
+		types.GPT40613:
 		return 3
-	case "gpt-3.5-turbo-0301":
+	case types.GPT3Turbo0301, types.GPT3Turbo16k0301:
 		return 4 // every message follows <|start|>{role/name}\n{content}<|end|>\n
 	default:
-		if strings.Contains(model, "gpt-3.5-turbo") {
+		if strings.Contains(model, types.GPT3Turbo) {
 			// warning: gpt-3.5-turbo may update over time. Returning num tokens assuming gpt-3.5-turbo-0613.
-			return GetWeightByModel("gpt-3.5-turbo-0613")
-		} else if strings.Contains(model, "gpt-4") {
+			return GetWeightByModel(types.GPT3Turbo0613)
+		} else if strings.Contains(model, types.GPT4) {
 			// warning: gpt-4 may update over time. Returning num tokens assuming gpt-4-0613.
-			return GetWeightByModel("gpt-4-0613")
+			return GetWeightByModel(types.GPT40613)
 		} else {
 			// not implemented: See https://github.com/openai/openai-python/blob/main/chatml.md for information on how messages are converted to tokens
 			panic(fmt.Errorf("not implemented for model %s", model))
@@ -55,6 +62,6 @@ func NumTokensFromMessages(messages []types.ChatGPTMessage, model string) (token
 	return tokens
 }
 
-func CountTokenPrice(messages []types.ChatGPTMessage) int {
-	return NumTokensFromMessages(messages, "gpt-4")
+func CountTokenPrice(messages []types.ChatGPTMessage, model string) int {
+	return NumTokensFromMessages(messages, model)
 }