diff --git a/js/plugins/google-cloud/src/telemetry/generate.ts b/js/plugins/google-cloud/src/telemetry/generate.ts
index f235a3ab3d..b2450f4c9f 100644
--- a/js/plugins/google-cloud/src/telemetry/generate.ts
+++ b/js/plugins/google-cloud/src/telemetry/generate.ts
@@ -299,6 +299,18 @@ class GenerateTelemetry implements Telemetry {
 
     output.candidates.forEach((cand, candIdx) => {
       const parts = cand.message.content.length;
+      const candCounts = parts > 1 ? ` (${candIdx + 1} of ${parts})` : '';
+      logger.logStructured(`Output Candidate[${path}, ${model}]${candCounts}`, {
+        ...sharedMetadata,
+        candidateIndex: candIdx,
+        totalCandidates: candidates,
+        messageIndex: cand.index,
+        finishReason: cand.finishReason,
+        finishMessage: cand.finishMessage,
+        role: cand.message.role,
+        usage: cand.usage,
+        custom: cand.custom,
+      });
       cand.message.content.forEach((part, partIdx) => {
         const partCounts = this.toPartCounts(
           partIdx,
@@ -321,6 +333,12 @@ class GenerateTelemetry implements Telemetry {
           finishReason: cand.finishReason,
         });
       });
+      if (output.usage) {
+        logger.logStructured(`Usage[${path}, ${model}]`, {
+          ...sharedMetadata,
+          usage: output.usage,
+        });
+      }
     });
   }
 
diff --git a/js/plugins/google-cloud/tests/logs_test.ts b/js/plugins/google-cloud/tests/logs_test.ts
index 596c3bb503..127d198a90 100644
--- a/js/plugins/google-cloud/tests/logs_test.ts
+++ b/js/plugins/google-cloud/tests/logs_test.ts
@@ -185,6 +185,18 @@ describe('GoogleCloudLogs no I/O', () => {
       logMessages.includes('[info] Output[testFlow, testModel]'),
       false
     );
+    assert.equal(
+      logMessages.includes(
+        '[info] Output Candidate[testFlow > sub1 > sub2 > testModel, testModel]'
+      ),
+      false
+    );
+    assert.equal(
+      logMessages.includes(
+        '[info] Usage[testFlow > sub1 > sub2 > testModel, testModel]'
+      ),
+      false
+    );
   });
 });
 
@@ -336,6 +348,18 @@ describe('GoogleCloudLogs', () => {
       logMessages.includes('[info] Output[testFlow, testFlow]'),
       true
     );
+    assert.equal(
+      logMessages.includes(
+        '[info] Output Candidate[testFlow > sub1 > sub2 > testModel, testModel]'
+      ),
+      true
+    );
+    assert.equal(
+      logMessages.includes(
+        '[info] Usage[testFlow > sub1 > sub2 > testModel, testModel]'
+      ),
+      true
+    );
   });
 });