diff --git a/backend/internal/pkg/antigravity/claude_types.go b/backend/internal/pkg/antigravity/claude_types.go
index 7c127b90..c955147a 100644
--- a/backend/internal/pkg/antigravity/claude_types.go
+++ b/backend/internal/pkg/antigravity/claude_types.go
@@ -161,6 +161,8 @@ var geminiModels = []modelDef{
 	{ID: "gemini-3-flash", DisplayName: "Gemini 3 Flash", CreatedAt: "2025-06-01T00:00:00Z"},
 	{ID: "gemini-3-pro-low", DisplayName: "Gemini 3 Pro Low", CreatedAt: "2025-06-01T00:00:00Z"},
 	{ID: "gemini-3-pro-high", DisplayName: "Gemini 3 Pro High", CreatedAt: "2025-06-01T00:00:00Z"},
+	{ID: "gemini-3.1-pro-low", DisplayName: "Gemini 3.1 Pro Low", CreatedAt: "2025-07-01T00:00:00Z"},
+	{ID: "gemini-3.1-pro-high", DisplayName: "Gemini 3.1 Pro High", CreatedAt: "2025-07-01T00:00:00Z"},
 	{ID: "gemini-3-pro-preview", DisplayName: "Gemini 3 Pro Preview", CreatedAt: "2025-06-01T00:00:00Z"},
 	{ID: "gemini-3-pro-image", DisplayName: "Gemini 3 Pro Image", CreatedAt: "2025-06-01T00:00:00Z"},
 }