diff --git a/CHANGELOG.md b/CHANGELOG.md
index d2039f66..819b4f7d 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,5 +1,15 @@
 # Changelog
 
+## [v1.0.13](https://github.com/kayac/nepp-chan/compare/v1.0.12...v1.0.13) - 2026-09-02
+
+- LLM利用コストの計測・集計・管理画面を拡張する by @owk-owk130 in https://github.com/kayac/nepp-chan/pull/1072
+- feat: メイン LLM を OpenAI GPT-5.6 へ切り替える（Gemini 併存） by @owk-owk130 in https://github.com/kayac/nepp-chan/pull/1019
+- モデルと reasoning effort をタスク相応に見直す by @owk-owk130 in https://github.com/kayac/nepp-chan/pull/1084
+- トークン消費・コストを日付単位のモデル内訳表示にする by @owk-owk130 in https://github.com/kayac/nepp-chan/pull/1112
+- refactor(server): SQL を repository に集約する by @owk-owk130 in https://github.com/kayac/nepp-chan/pull/1121
+- docs(lp): プライバシーポリシーを OpenAI API 切り替えに備えて更新 by @vesperworks in https://github.com/kayac/nepp-chan/pull/1110
+- chore(biome): .claude の除外をリポジトリ直下だけにする by @owk-owk130 in https://github.com/kayac/nepp-chan/pull/1122
+
 ## [v1.0.12](https://github.com/kayac/nepp-chan/compare/v1.0.11...v1.0.12) - 2026-08-28
 
 - ウィジェットに設置サイトの文脈を持たせる by @owk-owk130 in https://github.com/kayac/nepp-chan/pull/1015
diff --git a/lp/package.json b/lp/package.json
index 748e03b4..69bb6798 100644
--- a/lp/package.json
+++ b/lp/package.json
@@ -1,7 +1,7 @@
 {
   "name": "@nepp-chan/lp",
   "private": true,
-  "version": "1.0.12",
+  "version": "1.0.13",
   "type": "module",
   "scripts": {
     "dev": "astro dev",
diff --git a/package.json b/package.json
index 0130f6b7..590e3d90 100644
--- a/package.json
+++ b/package.json
@@ -1,6 +1,6 @@
 {
   "name": "nepp-chan",
-  "version": "1.0.12",
+  "version": "1.0.13",
   "private": true,
   "type": "module",
   "engines": {
diff --git a/server/package.json b/server/package.json
index 68295a5a..847815b6 100644
--- a/server/package.json
+++ b/server/package.json
@@ -1,6 +1,6 @@
 {
   "name": "@nepp-chan/server",
-  "version": "1.0.12",
+  "version": "1.0.13",
   "type": "module",
   "scripts": {
     "test": "vitest",
diff --git a/web/package.json b/web/package.json
index 5f86a9e3..b8c6cf5c 100644
--- a/web/package.json
+++ b/web/package.json
@@ -1,7 +1,7 @@
 {
   "name": "@nepp-chan/web",
   "private": true,
-  "version": "1.0.12",
+  "version": "1.0.13",
   "type": "module",
   "scripts": {
     "dev": "astro dev",