diff --git a/chat/chat.go b/chat/chat.go
index 35640d0..b564196 100644
--- a/chat/chat.go
+++ b/chat/chat.go
@@ -124,8 +124,6 @@ func (l *Log) ResetIn(grps ...int64) {
 	l.mu.Lock()
 	defer l.mu.Unlock()
 	for _, grp := range grps {
-		if _, exists := l.m[grp]; exists {
-			delete(l.m, grp)
-		}
+		delete(l.m, grp)
 	}
 }
diff --git a/model/openai.go b/model/openai.go
index 2f59a76..1f08ef0 100644
--- a/model/openai.go
+++ b/model/openai.go
@@ -37,6 +37,7 @@ type OpenAI struct {
 	Temperature float32   `json:"temperature"` // Temperature 0.7
 	TopP        float32   `json:"top_p"`       // TopP 0.9
 	MaxTokens   int       `json:"max_tokens"`  // MaxTokens 4096
+	ExtraBody   any       `json:"extra_body"`
 }
 
 // NewOpenAI use temp 0.7, topp 0.9, maxn 4096 if you don't know the meaning.
@@ -59,6 +60,11 @@ func (*OpenAI) Header(key string, h http.Header) {
 	h.Add("Authorization", "Bearer "+key)
 }
 
+func (opai *OpenAI) SetExtra(body any) *OpenAI {
+	opai.ExtraBody = body
+	return opai
+}
+
 func (opai *OpenAI) Body() *bytes.Buffer {
 	w := bytes.NewBuffer(make([]byte, 0, 8192))
 	err := json.NewEncoder(w).Encode(opai)