diff --git a/packages/types/src/providers/lite-llm.ts b/packages/types/src/providers/lite-llm.ts
index fdfef95bc6..715b279c36 100644
--- a/packages/types/src/providers/lite-llm.ts
+++ b/packages/types/src/providers/lite-llm.ts
@@ -30,6 +30,7 @@ export const LITELLM_COMPUTER_USE_MODELS = new Set([
 	"vertex_ai/claude-opus-4-1@20250805",
 	"vertex_ai/claude-opus-4@20250514",
 	"vertex_ai/claude-sonnet-4@20250514",
+	"vertex_ai/claude-sonnet-4-5@20250929",
 	"openrouter/anthropic/claude-3.5-sonnet",
 	"openrouter/anthropic/claude-3.5-sonnet:beta",
 	"openrouter/anthropic/claude-3.7-sonnet",
diff --git a/packages/types/src/providers/vertex.ts b/packages/types/src/providers/vertex.ts
index 7340035caf..f03d0b5805 100644
--- a/packages/types/src/providers/vertex.ts
+++ b/packages/types/src/providers/vertex.ts
@@ -3,21 +3,9 @@ import type { ModelInfo } from "../model.js"
 // https://cloud.google.com/vertex-ai/generative-ai/docs/partner-models/use-claude
 export type VertexModelId = keyof typeof vertexModels
 
-export const vertexDefaultModelId: VertexModelId = "claude-sonnet-4@20250514"
+export const vertexDefaultModelId: VertexModelId = "claude-sonnet-4-5@20250929"
 
 export const vertexModels = {
-	"claude-4.5-sonnet": {
-		maxTokens: 8192,
-		contextWindow: 200_000,
-		supportsImages: true,
-		supportsComputerUse: true,
-		supportsPromptCache: true,
-		inputPrice: 3.0,
-		outputPrice: 15.0,
-		cacheWritesPrice: 3.75,
-		cacheReadsPrice: 0.3,
-		supportsReasoningBudget: true,
-	},
 	"gemini-2.5-flash-preview-05-20:thinking": {
 		maxTokens: 65_535,
 		contextWindow: 1_048_576,
@@ -187,6 +175,18 @@ export const vertexModels = {
 		cacheReadsPrice: 0.3,
 		supportsReasoningBudget: true,
 	},
+	"claude-sonnet-4-5@20250929": {
+		maxTokens: 8192,
+		contextWindow: 200_000,
+		supportsImages: true,
+		supportsComputerUse: true,
+		supportsPromptCache: true,
+		inputPrice: 3.0,
+		outputPrice: 15.0,
+		cacheWritesPrice: 3.75,
+		cacheReadsPrice: 0.3,
+		supportsReasoningBudget: true,
+	},
 	"claude-opus-4-1@20250805": {
 		maxTokens: 8192,
 		contextWindow: 200_000,