diff --git a/CHANGELOG.md b/CHANGELOG.md
index c6533772..28c26768 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -4,6 +4,15 @@ All notable changes to CCS will be documented here.
 
 Format based on [Keep a Changelog](https://keepachangelog.com/).
 
+## [2.5.1] - 2025-11-07
+
+### Added
+- `ANTHROPIC_SMALL_FAST_MODEL` support for Kimi configuration
+- Updated all Kimi configuration templates to include `ANTHROPIC_SMALL_FAST_MODEL`
+
+### Fixed
+- Kimi API configuration now matches official documentation format
+
 ## [2.5.0] - 2025-11-07
 
 ### Added
diff --git a/VERSION b/VERSION
index 437459cd..73462a5a 100644
--- a/VERSION
+++ b/VERSION
@@ -1 +1 @@
-2.5.0
+2.5.1
diff --git a/config/base-kimi.settings.json b/config/base-kimi.settings.json
index f209aa07..ef554791 100644
--- a/config/base-kimi.settings.json
+++ b/config/base-kimi.settings.json
@@ -3,6 +3,7 @@
     "ANTHROPIC_BASE_URL": "https://api.kimi.com/coding/",
     "ANTHROPIC_AUTH_TOKEN": "YOUR_KIMI_API_KEY_HERE",
     "ANTHROPIC_MODEL": "kimi-for-coding",
+    "ANTHROPIC_SMALL_FAST_MODEL": "kimi-for-coding",
     "ANTHROPIC_DEFAULT_OPUS_MODEL": "kimi-for-coding",
     "ANTHROPIC_DEFAULT_SONNET_MODEL": "kimi-for-coding",
     "ANTHROPIC_DEFAULT_HAIKU_MODEL": "kimi-for-coding"
diff --git a/installers/install.ps1 b/installers/install.ps1
index 28bfb623..b261c2b9 100644
--- a/installers/install.ps1
+++ b/installers/install.ps1
@@ -31,7 +31,7 @@ $InstallMethod = if ($ScriptDir -and ((Test-Path "$ScriptDir\lib\ccs.ps1") -or (
 # IMPORTANT: Update this version when releasing new versions!
 # This hardcoded version is used for standalone installations (irm | iex)
 # For git installations, VERSION file is read if available
-$CcsVersion = "2.5.0"
+$CcsVersion = "2.5.1"
 
 # Try to read VERSION file for git installations
 if ($ScriptDir) {
@@ -161,6 +161,7 @@ function New-KimiTemplate {
             ANTHROPIC_BASE_URL = "https://api.kimi.com/coding/"
             ANTHROPIC_AUTH_TOKEN = "YOUR_KIMI_API_KEY_HERE"
             ANTHROPIC_MODEL = $KimiModel
+            ANTHROPIC_SMALL_FAST_MODEL = $KimiModel
             ANTHROPIC_DEFAULT_OPUS_MODEL = $KimiModel
             ANTHROPIC_DEFAULT_SONNET_MODEL = $KimiModel
             ANTHROPIC_DEFAULT_HAIKU_MODEL = $KimiModel
@@ -184,6 +185,7 @@ function New-KimiProfile {
             if (-not $Config.env) {
                 $Config | Add-Member -NotePropertyName env -NotePropertyValue @{} -Force
             }
+            $Config.env | Add-Member -NotePropertyName ANTHROPIC_SMALL_FAST_MODEL -NotePropertyValue $KimiModel -Force
             $Config.env | Add-Member -NotePropertyName ANTHROPIC_DEFAULT_OPUS_MODEL -NotePropertyValue $KimiModel -Force
             $Config.env | Add-Member -NotePropertyName ANTHROPIC_DEFAULT_SONNET_MODEL -NotePropertyValue $KimiModel -Force
             $Config.env | Add-Member -NotePropertyName ANTHROPIC_DEFAULT_HAIKU_MODEL -NotePropertyValue $KimiModel -Force
diff --git a/installers/install.sh b/installers/install.sh
index b6f190dc..7e4fd3f2 100755
--- a/installers/install.sh
+++ b/installers/install.sh
@@ -32,7 +32,7 @@ fi
 # IMPORTANT: Update this version when releasing new versions!
 # This hardcoded version is used for standalone installations (curl | bash)
 # For git installations, VERSION file is read if available
-CCS_VERSION="2.5.0"
+CCS_VERSION="2.5.1"
 
 # Try to read VERSION file for git installations
 if [[ -f "$SCRIPT_DIR/VERSION" ]]; then
@@ -283,6 +283,7 @@ create_kimi_template() {
     "ANTHROPIC_BASE_URL": "https://api.kimi.com/coding/",
     "ANTHROPIC_AUTH_TOKEN": "YOUR_KIMI_API_KEY_HERE",
     "ANTHROPIC_MODEL": "$KIMI_MODEL",
+    "ANTHROPIC_SMALL_FAST_MODEL": "$KIMI_MODEL",
     "ANTHROPIC_DEFAULT_OPUS_MODEL": "$KIMI_MODEL",
     "ANTHROPIC_DEFAULT_SONNET_MODEL": "$KIMI_MODEL",
     "ANTHROPIC_DEFAULT_HAIKU_MODEL": "$KIMI_MODEL"
@@ -411,6 +412,7 @@ create_kimi_profile() {
     echo "[OK] Copying current Kimi config to profile..."
     if command -v jq &> /dev/null; then
       if jq '.env |= (. // {}) + {
+        "ANTHROPIC_SMALL_FAST_MODEL": "'"$KIMI_MODEL"'",
         "ANTHROPIC_DEFAULT_OPUS_MODEL": "'"$KIMI_MODEL"'",
         "ANTHROPIC_DEFAULT_SONNET_MODEL": "'"$KIMI_MODEL"'",
         "ANTHROPIC_DEFAULT_HAIKU_MODEL": "'"$KIMI_MODEL"'"
@@ -433,6 +435,7 @@ create_kimi_profile() {
         "ANTHROPIC_BASE_URL": "https://api.kimi.com/coding/",
         "ANTHROPIC_AUTH_TOKEN": "YOUR_KIMI_API_KEY_HERE",
         "ANTHROPIC_MODEL": "'"$KIMI_MODEL"'",
+        "ANTHROPIC_SMALL_FAST_MODEL": "'"$KIMI_MODEL"'",
         "ANTHROPIC_DEFAULT_OPUS_MODEL": "'"$KIMI_MODEL"'",
         "ANTHROPIC_DEFAULT_SONNET_MODEL": "'"$KIMI_MODEL"'",
         "ANTHROPIC_DEFAULT_HAIKU_MODEL": "'"$KIMI_MODEL"'"
diff --git a/lib/ccs b/lib/ccs
index f9c6980c..211bb6f3 100755
--- a/lib/ccs
+++ b/lib/ccs
@@ -2,7 +2,7 @@
 set -euo pipefail
 
 # Version (updated by scripts/bump-version.sh)
-CCS_VERSION="2.5.0"
+CCS_VERSION="2.5.1"
 SCRIPT_DIR="$(cd "$(dirname "${BASH_SOURCE[0]}")" && pwd)"
 readonly CONFIG_FILE="${CCS_CONFIG:-$HOME/.ccs/config.json}"
 
diff --git a/lib/ccs.ps1 b/lib/ccs.ps1
index 8b5480b0..f84287d4 100644
--- a/lib/ccs.ps1
+++ b/lib/ccs.ps1
@@ -141,7 +141,7 @@ function Show-Help {
 }
 
 # Version (updated by scripts/bump-version.sh)
-$CcsVersion = "2.5.0"
+$CcsVersion = "2.5.1"
 $ScriptDir = Split-Path -Parent $MyInvocation.MyCommand.Path
 $ConfigFile = if ($env:CCS_CONFIG) { $env:CCS_CONFIG } else { "$env:USERPROFILE\.ccs\config.json" }
 
diff --git a/package-lock.json b/package-lock.json
index 04d87910..a1c4c9e1 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -1,12 +1,12 @@
 {
   "name": "@kaitranntt/ccs",
-  "version": "2.4.3",
+  "version": "2.5.1",
   "lockfileVersion": 3,
   "requires": true,
   "packages": {
     "": {
       "name": "@kaitranntt/ccs",
-      "version": "2.4.3",
+      "version": "2.5.1",
       "hasInstallScript": true,
       "license": "MIT",
       "os": [
diff --git a/package.json b/package.json
index 33606e3f..41404759 100644
--- a/package.json
+++ b/package.json
@@ -1,6 +1,6 @@
 {
   "name": "@kaitranntt/ccs",
-  "version": "2.5.0",
+  "version": "2.5.1",
   "description": "Claude Code Switch - Instant profile switching between Claude Sonnet 4.5 and GLM 4.6",
   "keywords": [
     "cli",
diff --git a/scripts/postinstall.js b/scripts/postinstall.js
index 2920ef16..9da7cf0f 100755
--- a/scripts/postinstall.js
+++ b/scripts/postinstall.js
@@ -84,6 +84,7 @@ function createConfigFiles() {
           ANTHROPIC_BASE_URL: 'https://api.kimi.com/coding/',
           ANTHROPIC_AUTH_TOKEN: 'YOUR_KIMI_API_KEY_HERE',
           ANTHROPIC_MODEL: 'kimi-for-coding',
+          ANTHROPIC_SMALL_FAST_MODEL: 'kimi-for-coding',
           ANTHROPIC_DEFAULT_OPUS_MODEL: 'kimi-for-coding',
           ANTHROPIC_DEFAULT_SONNET_MODEL: 'kimi-for-coding',
           ANTHROPIC_DEFAULT_HAIKU_MODEL: 'kimi-for-coding'