diff --git a/kernel/conf/ai.go b/kernel/conf/ai.go
index 9214f4c15..cd1bf8d08 100644
--- a/kernel/conf/ai.go
+++ b/kernel/conf/ai.go
@@ -19,6 +19,8 @@ package conf
 import (
 	"os"
 	"strconv"
+
+	"github.com/sashabaranov/go-openai"
 )
 
 type AI struct {
@@ -37,6 +39,7 @@ type OpenAI struct {
 func NewAI() *AI {
 	openAI := &OpenAI{
 		APITimeout: 30,
+		APIModel:   openai.GPT3Dot5Turbo,
 		APIBaseURL: "https://api.openai.com/v1",
 	}
 
diff --git a/kernel/model/conf.go b/kernel/model/conf.go
index c99edef12..9096d814e 100644
--- a/kernel/model/conf.go
+++ b/kernel/model/conf.go
@@ -339,7 +339,7 @@ func InitConf() {
 		Conf.AI = conf.NewAI()
 	}
 	if "" == Conf.AI.OpenAI.APIModel {
-		Conf.AI.OpenAI.APIModel = openai.GPT4
+		Conf.AI.OpenAI.APIModel = openai.GPT3Dot5Turbo
 	}
 
 	if "" != Conf.AI.OpenAI.APIKey {