diff --git a/app/src/routes/admin/System.tsx b/app/src/routes/admin/System.tsx
index 65a817e..b116203 100644
--- a/app/src/routes/admin/System.tsx
+++ b/app/src/routes/admin/System.tsx
@@ -44,7 +44,7 @@ import {
 } from "@/components/ui/dialog.tsx";
 import { DialogTitle } from "@radix-ui/react-dialog";
 import Require from "@/components/Require.tsx";
-import { Loader2 } from "lucide-react";
+import { Loader2, Settings2 } from "lucide-react";
 import { Textarea } from "@/components/ui/textarea.tsx";
 import Tips from "@/components/Tips.tsx";
 import { cn } from "@/components/ui/lib/utils.ts";
@@ -52,6 +52,7 @@ import { Switch } from "@/components/ui/switch.tsx";
 import { MultiCombobox } from "@/components/ui/multi-combobox.tsx";
 import { allGroups } from "@/utils/groups.ts";
 import { channelModels } from "@/admin/channel.ts";
+import { supportModels } from "@/conf";
 
 type CompProps<T> = {
   data: T;
@@ -592,6 +593,46 @@ function Common({ data, dispatch, onChange }: CompProps<CommonState>) {
           min={0}
         />
       </ParagraphItem>
+      <ParagraphItem>
+        <div className={`flex flex-row flex-wrap gap-2 ml-auto`}>
+          <Button
+            variant={`outline`}
+            onClick={() => dispatch({ type: "update:common.cache", value: [] })}
+          >
+            <Settings2
+              className={`inline-flex h-4 w-4 mr-2 translate-y-[1px]`}
+            />
+            {t("admin.system.cacheNone")}
+          </Button>
+          <Button
+            variant={`outline`}
+            onClick={() =>
+              dispatch({
+                type: "update:common.cache",
+                value: supportModels
+                  .filter((item) => item.free)
+                  .map((item) => item.id),
+              })
+            }
+          >
+            <Settings2
+              className={`inline-flex h-4 w-4 mr-2 translate-y-[1px]`}
+            />
+            {t("admin.system.cacheFree")}
+          </Button>
+          <Button
+            variant={`outline`}
+            onClick={() =>
+              dispatch({ type: "update:common.cache", value: channelModels })
+            }
+          >
+            <Settings2
+              className={`inline-flex h-4 w-4 mr-2 translate-y-[1px]`}
+            />
+            {t("admin.system.cacheAll")}
+          </Button>
+        </div>
+      </ParagraphItem>
       <ParagraphSpace />
       <ParagraphItem>
         <Label className={`flex flex-row items-center`}>
diff --git a/channel/worker.go b/channel/worker.go
index 90e2acd..3c085eb 100644
--- a/channel/worker.go
+++ b/channel/worker.go
@@ -5,6 +5,8 @@ import (
 	"chat/globals"
 	"chat/utils"
 	"fmt"
+	"github.com/go-redis/redis/v8"
+	"time"
 )
 
 func NewChatRequest(group string, props *adapter.ChatProps, hook globals.Hook) error {
@@ -28,3 +30,50 @@ func NewChatRequest(group string, props *adapter.ChatProps, hook globals.Hook) e
 	globals.Info(fmt.Sprintf("[channel] channels are exhausted for model %s", props.Model))
 	return err
 }
+
+func PreflightCache(cache *redis.Client, hash string, buffer *utils.Buffer, hook globals.Hook) (int64, bool, error) {
+	idx := utils.Intn64(globals.CacheAcceptedSize)
+	key := fmt.Sprintf("chat-cache:%d:%s", idx, hash)
+
+	raw, err := cache.Get(cache.Context(), key).Result()
+	if err != nil {
+		return idx, false, nil
+	}
+
+	buf, err := utils.UnmarshalString[utils.Buffer](raw)
+	if err != nil {
+		fmt.Println(err)
+		return idx, false, nil
+	}
+
+	data := buf.Read()
+	if data == "" {
+		return idx, false, nil
+	}
+
+	buffer.SetToolCalls(buf.GetToolCalls())
+	return idx, true, hook(data)
+}
+
+func StoreCache(cache *redis.Client, hash string, index int64, buffer *utils.Buffer) {
+	key := fmt.Sprintf("chat-cache:%d:%s", index, hash)
+	raw := utils.Marshal(buffer)
+	expire := time.Duration(globals.CacheAcceptedExpire) * time.Second
+
+	cache.Set(cache.Context(), key, raw, expire)
+}
+
+func NewChatRequestWithCache(cache *redis.Client, buffer *utils.Buffer, group string, props *adapter.ChatProps, hook globals.Hook) (bool, error) {
+	hash := utils.Md5Encrypt(utils.Marshal(props))
+	idx, hit, err := PreflightCache(cache, hash, buffer, hook)
+	if hit {
+		return true, err
+	}
+
+	if err = NewChatRequest(group, props, hook); err != nil {
+		return false, err
+	}
+
+	StoreCache(cache, hash, idx, buffer)
+	return false, nil
+}
diff --git a/manager/chat.go b/manager/chat.go
index 42ea977..d9e83b3 100644
--- a/manager/chat.go
+++ b/manager/chat.go
@@ -19,15 +19,16 @@ const defaultMessage = "empty response"
 func CollectQuota(c *gin.Context, user *auth.User, buffer *utils.Buffer, uncountable bool, err error) {
 	db := utils.GetDBFromContext(c)
 	quota := buffer.GetQuota()
-	if buffer.IsEmpty() {
-		return
-	} else if buffer.GetCharge().IsBillingType(globals.TimesBilling) && err != nil {
-		// billing type is times, but error occurred
+
+	if user == nil || quota <= 0 {
 		return
 	}
 
-	// collect quota for tokens billing (though error occurred) or times billing
-	if !uncountable && quota > 0 && user != nil {
+	if buffer.IsEmpty() || err != nil {
+		return
+	}
+
+	if !uncountable {
 		user.UseQuota(db, quota)
 	}
 }
@@ -92,7 +93,8 @@ func ChatHandler(conn *Connection, user *auth.User, instance *conversation.Conve
 	}
 
 	buffer := utils.NewBuffer(model, segment, channel.ChargeInstance.GetCharge(model))
-	err := channel.NewChatRequest(
+	hit, err := channel.NewChatRequestWithCache(
+		cache, buffer,
 		auth.GetGroup(db, user),
 		&adapter.ChatProps{
 			Model:             model,
@@ -125,7 +127,6 @@ func ChatHandler(conn *Connection, user *auth.User, instance *conversation.Conve
 		globals.Warn(fmt.Sprintf("caught error from chat handler: %s (instance: %s, client: %s)", err, model, conn.GetCtx().ClientIP()))
 
 		auth.RevertSubscriptionUsage(db, cache, user, model)
-		CollectQuota(conn.GetCtx(), user, buffer, plan, err)
 		conn.Send(globals.ChatSegmentResponse{
 			Message: err.Error(),
 			End:     true,
@@ -133,7 +134,9 @@ func ChatHandler(conn *Connection, user *auth.User, instance *conversation.Conve
 		return err.Error()
 	}
 
-	CollectQuota(conn.GetCtx(), user, buffer, plan, err)
+	if !hit {
+		CollectQuota(conn.GetCtx(), user, buffer, plan, err)
+	}
 
 	if buffer.IsEmpty() {
 		conn.Send(globals.ChatSegmentResponse{
diff --git a/manager/chat_completions.go b/manager/chat_completions.go
index 41cf7e9..965b661 100644
--- a/manager/chat_completions.go
+++ b/manager/chat_completions.go
@@ -89,7 +89,7 @@ func sendTranshipmentResponse(c *gin.Context, form RelayForm, messages []globals
 	cache := utils.GetCacheFromContext(c)
 
 	buffer := utils.NewBuffer(form.Model, messages, channel.ChargeInstance.GetCharge(form.Model))
-	err := channel.NewChatRequest(auth.GetGroup(db, user), getChatProps(form, messages, buffer, plan), func(data string) error {
+	hit, err := channel.NewChatRequestWithCache(cache, buffer, auth.GetGroup(db, user), getChatProps(form, messages, buffer, plan), func(data string) error {
 		buffer.Write(data)
 		return nil
 	})
@@ -103,7 +103,10 @@ func sendTranshipmentResponse(c *gin.Context, form RelayForm, messages []globals
 		return
 	}
 
-	CollectQuota(c, user, buffer, plan, err)
+	if !hit {
+		CollectQuota(c, user, buffer, plan, err)
+	}
+
 	c.JSON(http.StatusOK, RelayResponse{
 		Id:      fmt.Sprintf("chatcmpl-%s", id),
 		Object:  "chat.completion",
@@ -158,7 +161,7 @@ func sendStreamTranshipmentResponse(c *gin.Context, form RelayForm, messages []g
 
 	go func() {
 		buffer := utils.NewBuffer(form.Model, messages, channel.ChargeInstance.GetCharge(form.Model))
-		err := channel.NewChatRequest(auth.GetGroup(db, user), getChatProps(form, messages, buffer, plan), func(data string) error {
+		hit, err := channel.NewChatRequestWithCache(cache, buffer, auth.GetGroup(db, user), getChatProps(form, messages, buffer, plan), func(data string) error {
 			partial <- getStreamTranshipmentForm(id, created, form, buffer.Write(data), buffer, false, nil)
 			return nil
 		})
@@ -173,7 +176,11 @@ func sendStreamTranshipmentResponse(c *gin.Context, form RelayForm, messages []g
 		}
 
 		partial <- getStreamTranshipmentForm(id, created, form, "", buffer, true, nil)
-		CollectQuota(c, user, buffer, plan, err)
+
+		if !hit {
+			CollectQuota(c, user, buffer, plan, err)
+		}
+
 		close(partial)
 		return
 	}()
diff --git a/manager/completions.go b/manager/completions.go
index b3dba51..473b18b 100644
--- a/manager/completions.go
+++ b/manager/completions.go
@@ -40,7 +40,8 @@ func NativeChatHandler(c *gin.Context, user *auth.User, model string, message []
 	}
 
 	buffer := utils.NewBuffer(model, segment, channel.ChargeInstance.GetCharge(model))
-	err := channel.NewChatRequest(
+	hit, err := channel.NewChatRequestWithCache(
+		cache, buffer,
 		auth.GetGroup(db, user),
 		&adapter.ChatProps{
 			Model:   model,
@@ -56,11 +57,12 @@ func NativeChatHandler(c *gin.Context, user *auth.User, model string, message []
 	admin.AnalysisRequest(model, buffer, err)
 	if err != nil {
 		auth.RevertSubscriptionUsage(db, cache, user, model)
-		CollectQuota(c, user, buffer, plan, err)
 		return err.Error(), 0
 	}
 
-	CollectQuota(c, user, buffer, plan, err)
+	if !hit {
+		CollectQuota(c, user, buffer, plan, err)
+	}
 
 	SaveCacheData(c, &CacheProps{
 		Message:    segment,
diff --git a/manager/images.go b/manager/images.go
index 5cff199..a35ba5c 100644
--- a/manager/images.go
+++ b/manager/images.go
@@ -89,7 +89,7 @@ func createRelayImageObject(c *gin.Context, form RelayImageForm, prompt string,
 	}
 
 	buffer := utils.NewBuffer(form.Model, messages, channel.ChargeInstance.GetCharge(form.Model))
-	err := channel.NewChatRequest(auth.GetGroup(db, user), getImageProps(form, messages, buffer), func(data string) error {
+	hit, err := channel.NewChatRequestWithCache(cache, buffer, auth.GetGroup(db, user), getImageProps(form, messages, buffer), func(data string) error {
 		buffer.Write(data)
 		return nil
 	})
@@ -103,7 +103,9 @@ func createRelayImageObject(c *gin.Context, form RelayImageForm, prompt string,
 		return
 	}
 
-	CollectQuota(c, user, buffer, plan, err)
+	if !hit {
+		CollectQuota(c, user, buffer, plan, err)
+	}
 
 	image := getUrlFromBuffer(buffer)
 	if image == "" {
diff --git a/utils/base.go b/utils/base.go
index efa96f7..ff63d19 100644
--- a/utils/base.go
+++ b/utils/base.go
@@ -13,6 +13,12 @@ func Intn(n int) int {
 	return r.Intn(n)
 }
 
+func Intn64(n int64) int64 {
+	source := rand.NewSource(time.Now().UnixNano())
+	r := rand.New(source)
+	return r.Int63n(n)
+}
+
 func IntnSeed(n int, seed int) int {
 	// unix nano is the same if called in the same nanosecond, so we need to add another random seed
 	source := rand.NewSource(time.Now().UnixNano() + int64(seed))
diff --git a/utils/buffer.go b/utils/buffer.go
index e823c4d..483383a 100644
--- a/utils/buffer.go
+++ b/utils/buffer.go
@@ -26,7 +26,7 @@ type Buffer struct {
 	History   []globals.Message  `json:"history"`
 	Images    Images             `json:"images"`
 	ToolCalls *globals.ToolCalls `json:"tool_calls"`
-	Charge    Charge             `json:"charge"`
+	Charge    Charge             `json:"-"`
 }
 
 func NewBuffer(model string, history []globals.Message, charge Charge) *Buffer {
diff --git a/utils/char.go b/utils/char.go
index 46aaa21..7fbed1f 100644
--- a/utils/char.go
+++ b/utils/char.go
@@ -47,8 +47,13 @@ func Unmarshal[T interface{}](data []byte) (form T, err error) {
 	return form, err
 }
 
+func UnmarshalString[T interface{}](data string) (form T, err error) {
+	err = json.Unmarshal([]byte(data), &form)
+	return form, err
+}
+
 func UnmarshalForm[T interface{}](data string) *T {
-	form, err := Unmarshal[T]([]byte(data))
+	form, err := UnmarshalString[T](data)
 	if err != nil {
 		return nil
 	}