diff --git a/relay/adaptor/vertexai/adaptor.go b/relay/adaptor/vertexai/adaptor.go
index 6bca7bec..cf5d4c48 100644
--- a/relay/adaptor/vertexai/adaptor.go
+++ b/relay/adaptor/vertexai/adaptor.go
@@ -38,7 +38,7 @@ func (a *Adaptor) ConvertRequest(c *gin.Context, relayMode int, request *model.G
 }
 
 func (a *Adaptor) DoResponse(c *gin.Context, resp *http.Response, meta *meta.Meta) (usage *model.Usage, err *model.ErrorWithStatusCode) {
-	adaptor := GetAdaptor(meta.OriginModelName)
+	adaptor := GetAdaptor(meta.ActualModelName)
 	if adaptor == nil {
 		return nil, &relaymodel.ErrorWithStatusCode{
 			StatusCode: http.StatusInternalServerError,
diff --git a/relay/meta/relay_meta.go b/relay/meta/relay_meta.go
index b2f1e6ce..6167bffe 100644
--- a/relay/meta/relay_meta.go
+++ b/relay/meta/relay_meta.go
@@ -11,20 +11,22 @@ import (
 )
 
 type Meta struct {
-	Mode            int
-	ChannelType     int
-	ChannelId       int
-	TokenId         int
-	TokenName       string
-	UserId          int
-	Group           string
-	ModelMapping    map[string]string
-	BaseURL         string
-	APIKey          string
-	APIType         int
-	Config          model.ChannelConfig
-	IsStream        bool
+	Mode         int
+	ChannelType  int
+	ChannelId    int
+	TokenId      int
+	TokenName    string
+	UserId       int
+	Group        string
+	ModelMapping map[string]string
+	BaseURL      string
+	APIKey       string
+	APIType      int
+	Config       model.ChannelConfig
+	IsStream     bool
+	// OriginModelName is the model name from the raw user request
 	OriginModelName string
+	// ActualModelName is the model name after mapping
 	ActualModelName string
 	RequestURLPath  string
 	PromptTokens    int // only for DoResponse