diff --git a/.release-please-manifest.json b/.release-please-manifest.json
index f8723d8ded34..e3fbf1056fb8 100644
--- a/.release-please-manifest.json
+++ b/.release-please-manifest.json
@@ -21,7 +21,7 @@
   "google-analytics-data-v1beta+FILLER": "0.0.0",
   "google-apps-chat": "1.2.0",
   "google-apps-chat+FILLER": "0.0.0",
-  "google-apps-chat-v1": "0.22.0",
+  "google-apps-chat-v1": "0.21.0",
   "google-apps-chat-v1+FILLER": "0.0.0",
   "google-apps-events-subscriptions": "1.2.0",
   "google-apps-events-subscriptions+FILLER": "0.0.0",
@@ -49,7 +49,7 @@
   "google-cloud-advisory_notifications-v1+FILLER": "0.0.0",
   "google-cloud-ai_platform": "2.3.0",
   "google-cloud-ai_platform+FILLER": "0.0.0",
-  "google-cloud-ai_platform-v1": "1.39.0",
+  "google-cloud-ai_platform-v1": "1.40.0",
   "google-cloud-ai_platform-v1+FILLER": "0.0.0",
   "google-cloud-alloy_db": "2.2.0",
   "google-cloud-alloy_db+FILLER": "0.0.0",
@@ -401,11 +401,11 @@
   "google-cloud-eventarc-publishing+FILLER": "0.0.0",
   "google-cloud-eventarc-publishing-v1": "1.7.0",
   "google-cloud-eventarc-publishing-v1+FILLER": "0.0.0",
-  "google-cloud-eventarc-v1": "2.7.1",
+  "google-cloud-eventarc-v1": "2.7.0",
   "google-cloud-eventarc-v1+FILLER": "0.0.0",
   "google-cloud-filestore": "2.1.0",
   "google-cloud-filestore+FILLER": "0.0.0",
-  "google-cloud-filestore-v1": "2.6.1",
+  "google-cloud-filestore-v1": "2.6.0",
   "google-cloud-filestore-v1+FILLER": "0.0.0",
   "google-cloud-financial_services": "0.2.0",
   "google-cloud-financial_services+FILLER": "0.0.0",
@@ -421,9 +421,9 @@
   "google-cloud-firestore-v1+FILLER": "0.0.0",
   "google-cloud-functions": "2.1.0",
   "google-cloud-functions+FILLER": "0.0.0",
-  "google-cloud-functions-v1": "2.5.1",
+  "google-cloud-functions-v1": "2.5.0",
   "google-cloud-functions-v1+FILLER": "0.0.0",
-  "google-cloud-functions-v2": "1.5.1",
+  "google-cloud-functions-v2": "1.5.0",
   "google-cloud-functions-v2+FILLER": "0.0.0",
   "google-cloud-gdc_hardware_management": "0.3.0",
   "google-cloud-gdc_hardware_management+FILLER": "0.0.0",
@@ -467,7 +467,7 @@
   "google-cloud-hypercompute_cluster-v1beta+FILLER": "0.0.0",
   "google-cloud-iap": "1.6.0",
   "google-cloud-iap+FILLER": "0.0.0",
-  "google-cloud-iap-v1": "1.7.1",
+  "google-cloud-iap-v1": "1.7.0",
   "google-cloud-iap-v1+FILLER": "0.0.0",
   "google-cloud-ids": "2.1.0",
   "google-cloud-ids+FILLER": "0.0.0",
diff --git a/google-cloud-ai_platform-v1/CHANGELOG.md b/google-cloud-ai_platform-v1/CHANGELOG.md
index 2d00aa9cab92..93f530a0ed67 100644
--- a/google-cloud-ai_platform-v1/CHANGELOG.md
+++ b/google-cloud-ai_platform-v1/CHANGELOG.md
@@ -1,5 +1,11 @@
 # Changelog
 
+### 1.40.0 (2026-04-03)
+
+#### Features
+
+* add evaluation metrics and autorater configuration to the AI Platform v1 API ([#33660](https://github.com/googleapis/google-cloud-ruby/issues/33660)) 
+
 ### 1.39.0 (2026-04-02)
 
 #### Features
diff --git a/google-cloud-ai_platform-v1/lib/google/cloud/ai_platform/v1/version.rb b/google-cloud-ai_platform-v1/lib/google/cloud/ai_platform/v1/version.rb
index 0a9b21b30e3c..5892bc27d254 100644
--- a/google-cloud-ai_platform-v1/lib/google/cloud/ai_platform/v1/version.rb
+++ b/google-cloud-ai_platform-v1/lib/google/cloud/ai_platform/v1/version.rb
@@ -21,7 +21,7 @@ module Google
   module Cloud
     module AIPlatform
       module V1
-        VERSION = "1.39.0"
+        VERSION = "1.40.0"
       end
     end
   end
diff --git a/google-cloud-ai_platform-v1/snippets/snippet_metadata_google.cloud.aiplatform.v1.json b/google-cloud-ai_platform-v1/snippets/snippet_metadata_google.cloud.aiplatform.v1.json
index 241e4e038622..9a51dad81731 100644
--- a/google-cloud-ai_platform-v1/snippets/snippet_metadata_google.cloud.aiplatform.v1.json
+++ b/google-cloud-ai_platform-v1/snippets/snippet_metadata_google.cloud.aiplatform.v1.json
@@ -1,7 +1,7 @@
 {
   "client_library": {
     "name": "google-cloud-ai_platform-v1",
-    "version": "1.39.0",
+    "version": "1.40.0",
     "language": "RUBY",
     "apis": [
       {