Update convert.go

dont compile every time and dont !="" because of +

conversion/requests/chatgpt/convert.go

@@ -11,6 +11,8 @@ import (
 	arkose "github.com/xqdoo00o/funcaptcha"
 )
 
+var gpt4Regexp = regexp.MustCompile(`^(gpt-4|gpt-4o)(?:-gizmo-g-(\w+))?$`)
+
 func ConvertAPIRequest(api_request official_types.APIRequest, account string, secret *tokens.Secret, deviceId string, requireArk bool, dx string, proxy string) chatgpt_types.ChatGPTRequest {
 	chatgpt_request := chatgpt_types.NewChatGPTRequest()
 	var api_version int
@@ -22,15 +24,13 @@ func ConvertAPIRequest(api_request official_types.APIRequest, account string, se
 		chatgpt_request.Model = "text-davinci-002-render-sha"
 	} else if strings.HasPrefix(api_request.Model, "gpt-4") {
 		api_version = 4
-
-		re := regexp.MustCompile(`^(gpt-4|gpt-4o)(?:-gizmo-g-(\w+))?$`)
-		matches := re.FindStringSubmatch(api_request.Model)
+		matches := gpt4Regexp.FindStringSubmatch(api_request.Model)
 		if len(matches) > 0 {
 			chatgpt_request.Model = matches[1]
 		} else {
 			chatgpt_request.Model = "gpt-4"
 		}
-		if len(matches) == 3 && matches[2] != "" {
+		if len(matches) == 3 {
 			chatgpt_request.ConversationMode.Kind = "gizmo_interaction"
 			chatgpt_request.ConversationMode.GizmoId = "g-" + matches[2]
 		}