diff --git a/packages/types/src/providers/gemini.ts b/packages/types/src/providers/gemini.ts
index e7a73e6d0e..d95d8d93f1 100644
--- a/packages/types/src/providers/gemini.ts
+++ b/packages/types/src/providers/gemini.ts
@@ -7,7 +7,7 @@ export const geminiDefaultModelId: GeminiModelId = "gemini-2.5-pro"
 
 export const geminiModels = {
 	"gemini-3-pro-preview": {
-		maxTokens: 65_536,
+		maxTokens: 64_000,
 		contextWindow: 1_048_576,
 		supportsImages: true,
 		supportsNativeTools: true,
diff --git a/packages/types/src/providers/vertex.ts b/packages/types/src/providers/vertex.ts
index e533992bd1..5fa176239b 100644
--- a/packages/types/src/providers/vertex.ts
+++ b/packages/types/src/providers/vertex.ts
@@ -7,7 +7,7 @@ export const vertexDefaultModelId: VertexModelId = "claude-sonnet-4-5@20250929"
 
 export const vertexModels = {
 	"gemini-3-pro-preview": {
-		maxTokens: 65_536,
+		maxTokens: 64_000,
 		contextWindow: 1_048_576,
 		supportsImages: true,
 		supportsPromptCache: true,