diff --git a/packages/types/src/providers/vertex.ts b/packages/types/src/providers/vertex.ts
index 345e9f00bd..55ed4e8ecf 100644
--- a/packages/types/src/providers/vertex.ts
+++ b/packages/types/src/providers/vertex.ts
@@ -6,6 +6,21 @@ export type VertexModelId = keyof typeof vertexModels
 export const vertexDefaultModelId: VertexModelId = "claude-sonnet-4-5@20250929"
 
 export const vertexModels = {
+	"gemini-3.5-flash": {
+		maxTokens: 65_535,
+		contextWindow: 1_048_576,
+		supportsImages: true,
+		supportsPromptCache: true,
+		supportsReasoningEffort: ["minimal", "low", "medium", "high"],
+		reasoningEffort: "medium",
+
+		supportsTemperature: true,
+		defaultTemperature: 1,
+		inputPrice: 1.50,
+		outputPrice: 9.00,
+		cacheReadsPrice: 0.15,
+		cacheWritesPrice: 1.50,
+	},
 	"gemini-3.1-pro-preview": {
 		maxTokens: 65_536,
 		contextWindow: 1_048_576,