diff --git a/relay/channel/vertex/adaptor.go b/relay/channel/vertex/adaptor.go
index 481524e49..bd9cc97c5 100644
--- a/relay/channel/vertex/adaptor.go
+++ b/relay/channel/vertex/adaptor.go
@@ -40,6 +40,7 @@ var claudeModelMap = map[string]string{
 	"claude-opus-4-20250514":     "claude-opus-4@20250514",
 	"claude-opus-4-1-20250805":   "claude-opus-4-1@20250805",
 	"claude-sonnet-4-5-20250929": "claude-sonnet-4-5@20250929",
+	"claude-haiku-4-5-20251001":  "claude-haiku-4-5@20251001",
 	"claude-opus-4-5-20251101":   "claude-opus-4-5@20251101",
 }