diff --git a/common/model-ratio.go b/common/model-ratio.go
index 2ff1aa4..404fffd 100644
--- a/common/model-ratio.go
+++ b/common/model-ratio.go
@@ -201,7 +201,7 @@ func GetCompletionRatio(name string) float64 {
 		return 4.0 / 3.0
 	}
 	if strings.HasPrefix(name, "gpt-4") {
-		if strings.HasSuffix(name, "preview") {
+		if strings.HasSuffix(name, "gpt-4-turbo") {
 			return 3
 		}
 		return 2