diff --git a/packages/ai/src/providers/google-vertex.ts b/packages/ai/src/providers/google-vertex.ts
index b2faa8659..91a4616c0 100644
--- a/packages/ai/src/providers/google-vertex.ts
+++ b/packages/ai/src/providers/google-vertex.ts
@@ -225,7 +225,7 @@ export const streamGoogleVertex: StreamFunction<"google-vertex", GoogleVertexOpt
 
 				if (chunk.usageMetadata) {
 					output.usage = {
-						input: chunk.usageMetadata.promptTokenCount || 0,
+						input: (chunk.usageMetadata.promptTokenCount || 0) - (chunk.usageMetadata.cachedContentTokenCount || 0),
 						output:
 							(chunk.usageMetadata.candidatesTokenCount || 0) + (chunk.usageMetadata.thoughtsTokenCount || 0),
 						cacheRead: chunk.usageMetadata.cachedContentTokenCount || 0,
diff --git a/packages/ai/src/providers/google.ts b/packages/ai/src/providers/google.ts
index 5a1242fd4..a37293f17 100644
--- a/packages/ai/src/providers/google.ts
+++ b/packages/ai/src/providers/google.ts
@@ -211,7 +211,7 @@ export const streamGoogle: StreamFunction<"google-generative-ai", GoogleOptions>
 
 				if (chunk.usageMetadata) {
 					output.usage = {
-						input: chunk.usageMetadata.promptTokenCount || 0,
+						input: (chunk.usageMetadata.promptTokenCount || 0) - (chunk.usageMetadata.cachedContentTokenCount || 0),
 						output:
 							(chunk.usageMetadata.candidatesTokenCount || 0) + (chunk.usageMetadata.thoughtsTokenCount || 0),
 						cacheRead: chunk.usageMetadata.cachedContentTokenCount || 0,