diff --git a/README.fr.md b/README.fr.md
index 574402a3e..1d5a3a256 100644
--- a/README.fr.md
+++ b/README.fr.md
@@ -1,5 +1,5 @@
 <div align="center">
-  <img src="assets/logo.jpg" alt="PicoClaw" width="512">
+  <img src="assets/logo.webp" alt="PicoClaw" width="512">
 
   <h1>PicoClaw : Assistant IA Ultra-Efficace en Go</h1>
 
@@ -206,9 +206,7 @@ docker compose -f docker/docker-compose.yml --profile gateway up -d
 ### 🚀 Démarrage Rapide
 
 > [!TIP]
-> Configurez votre clé API dans `~/.picoclaw/config.json`.
-> Obtenir des clés API : [OpenRouter](https://openrouter.ai/keys) (LLM) · [Zhipu](https://open.bigmodel.cn/usercenter/proj-mgmt/apikeys) (LLM)
-> La recherche web est **optionnelle** — obtenez gratuitement l'[API Brave Search](https://brave.com/search/api) (2000 requêtes gratuites/mois) ou utilisez le repli automatique intégré.
+> Configurez votre clé API dans `~/.picoclaw/config.json`. Obtenez des clés API : [Volcengine (CodingPlan)](https://console.volcengine.com) (LLM) · [OpenRouter](https://openrouter.ai/keys) (LLM) · [Zhipu](https://open.bigmodel.cn/usercenter/proj-mgmt/apikeys) (LLM). La recherche web est optionnelle — obtenez gratuitement l'[API Tavily](https://tavily.com) (1000 requêtes gratuites/mois) ou l'[API Brave Search](https://brave.com/search/api) (2000 requêtes gratuites/mois).
 
 **1. Initialiser**
 
@@ -222,8 +220,13 @@ picoclaw onboard
 {
   "model_list": [
     {
-      "model_name": "gpt4",
-      "model": "openai/gpt-5.2",
+      "model_name": "ark-code-latest",
+      "model": "volcengine/ark-code-latest",
+      "api_key": "sk-your-api-key"
+    },
+    {
+      "model_name": "gpt-5.4",
+      "model": "openai/gpt-5.4",
       "api_key": "sk-your-openai-key",
       "request_timeout": 300,
       "api_base": "https://api.openai.com/v1"
@@ -231,7 +234,7 @@ picoclaw onboard
   ],
   "agents": {
     "defaults": {
-      "model_name": "gpt4"
+      "model_name": "gpt-5.4"
     }
   },
   "channels": {
@@ -977,8 +980,9 @@ Cette conception permet également le **support multi-agent** avec une sélectio
 | **OpenRouter** | `openrouter/` | `https://openrouter.ai/api/v1` | OpenAI | [Obtenir Clé](https://openrouter.ai/keys) |
 | **VLLM** | `vllm/` | `http://localhost:8000/v1` | OpenAI | Local |
 | **Cerebras** | `cerebras/` | `https://api.cerebras.ai/v1` | OpenAI | [Obtenir Clé](https://cerebras.ai) |
-| **Volcengine** | `volcengine/` | `https://ark.cn-beijing.volces.com/api/v3` | OpenAI | [Obtenir Clé](https://console.volcengine.com) |
+| **VolcEngine (Doubao)** | `volcengine/` | `https://ark.cn-beijing.volces.com/api/v3` | OpenAI | [Obtenir Clé](https://console.volcengine.com) |
 | **ShengsuanYun** | `shengsuanyun/` | `https://router.shengsuanyun.com/api/v1` | OpenAI | - |
+| **BytePlus**        | `byteplus/`       | `https://ark.ap-southeast.bytepluses.com/api/v3`    | OpenAI    | [Obtenir Clé](https://console.volcengine.com)                    |
 | **LongCat**         | `longcat/`        | `https://api.longcat.chat/openai`                   | OpenAI    | [Obtenir une clé](https://longcat.chat/platform)                 |
 | **Antigravity** | `antigravity/` | Google Cloud | Custom | OAuth uniquement |
 | **GitHub Copilot** | `github-copilot/` | `localhost:4321` | gRPC | - |
@@ -989,8 +993,13 @@ Cette conception permet également le **support multi-agent** avec une sélectio
 {
   "model_list": [
     {
-      "model_name": "gpt-5.2",
-      "model": "openai/gpt-5.2",
+      "model_name": "ark-code-latest",
+      "model": "volcengine/ark-code-latest",
+      "api_key": "sk-your-api-key"
+    },
+    {
+      "model_name": "gpt-5.4",
+      "model": "openai/gpt-5.4",
       "api_key": "sk-your-openai-key"
     },
     {
@@ -1006,7 +1015,7 @@ Cette conception permet également le **support multi-agent** avec une sélectio
   ],
   "agents": {
     "defaults": {
-      "model": "gpt-5.2"
+      "model": "gpt-5.4"
     }
   }
 }
@@ -1017,8 +1026,17 @@ Cette conception permet également le **support multi-agent** avec une sélectio
 **OpenAI**
 ```json
 {
-  "model_name": "gpt-5.2",
-  "model": "openai/gpt-5.2",
+  "model_name": "gpt-5.4",
+  "model": "openai/gpt-5.4",
+  "api_key": "sk-..."
+}
+```
+
+**VolcEngine (Doubao)**
+```json
+{
+  "model_name": "ark-code-latest",
+  "model": "volcengine/ark-code-latest",
   "api_key": "sk-..."
 }
 ```
@@ -1061,14 +1079,14 @@ Configurez plusieurs points de terminaison pour le même nom de modèle—PicoCl
 {
   "model_list": [
     {
-      "model_name": "gpt-5.2",
-      "model": "openai/gpt-5.2",
+      "model_name": "gpt-5.4",
+      "model": "openai/gpt-5.4",
       "api_base": "https://api1.example.com/v1",
       "api_key": "sk-key1"
     },
     {
-      "model_name": "gpt-5.2",
-      "model": "openai/gpt-5.2",
+      "model_name": "gpt-5.4",
+      "model": "openai/gpt-5.4",
       "api_base": "https://api2.example.com/v1",
       "api_key": "sk-key2"
     }
@@ -1200,6 +1218,13 @@ Cela se produit lorsqu'une autre instance du bot est en cours d'exécution. Assu
 | Service          | Offre Gratuite       | Cas d'Utilisation                     |
 | ---------------- | -------------------- | ------------------------------------- |
 | **OpenRouter**   | 200K tokens/mois     | Multiples modèles (Claude, GPT-4, etc.) |
-| **Zhipu**        | 200K tokens/mois     | Idéal pour les utilisateurs chinois   |
+| **Volcengine CodingPlan** | 9,9¥/premier mois | Idéal pour les utilisateurs chinois, multiples modèles SOTA (Doubao, DeepSeek, etc.) |
+| **Zhipu**        | 200K tokens/mois     | Convient aux utilisateurs chinois   |
 | **Brave Search** | 2000 requêtes/mois   | Fonctionnalité de recherche web       |
 | **Groq**         | Offre gratuite dispo | Inférence ultra-rapide (Llama, Mixtral) |
+
+---
+
+<div align="center">
+  <img src="assets/logo.jpg" alt="PicoClaw Meme" width="512">
+</div>
diff --git a/README.ja.md b/README.ja.md
index 1eb47cfdc..d41975294 100644
--- a/README.ja.md
+++ b/README.ja.md
@@ -1,5 +1,5 @@
 <div align="center">
-<img src="assets/logo.jpg" alt="PicoClaw" width="512">
+<img src="assets/logo.webp" alt="PicoClaw" width="512">
 
 <h1>PicoClaw: Go で書かれた超効率 AI アシスタント</h1>
 
@@ -168,9 +168,7 @@ docker compose -f docker/docker-compose.yml --profile gateway up -d
 ### 🚀 クイックスタート（ネイティブ）
 
 > [!TIP]
-> `~/.picoclaw/config.json` に API キーを設定してください。
-> API キーの取得先: [OpenRouter](https://openrouter.ai/keys) (LLM) · [Zhipu](https://open.bigmodel.cn/usercenter/proj-mgmt/apikeys) (LLM)
-> Web 検索は **任意** です - 無料の [Tavily API](https://tavily.com) (月 1000 クエリ無料) または [Brave Search API](https://brave.com/search/api) (月 2000 クエリ無料)
+> `~/.picoclaw/config.json` に API キーを設定してください。API キーの取得先: [Volcengine (CodingPlan)](https://console.volcengine.com) (LLM) · [OpenRouter](https://openrouter.ai/keys) (LLM) · [Zhipu](https://open.bigmodel.cn/usercenter/proj-mgmt/apikeys) (LLM)。Web 検索は **任意** です — 無料の [Tavily API](https://tavily.com) (月 1000 クエリ無料) または [Brave Search API](https://brave.com/search/api) (月 2000 クエリ無料)。
 
 **1. 初期化**
 
@@ -184,8 +182,13 @@ picoclaw onboard
 {
   "model_list": [
     {
-      "model_name": "gpt4",
-      "model": "openai/gpt-5.2",
+      "model_name": "ark-code-latest",
+      "model": "volcengine/ark-code-latest",
+      "api_key": "sk-your-api-key"
+    },
+    {
+      "model_name": "gpt-5.4",
+      "model": "openai/gpt-5.4",
       "api_key": "sk-your-openai-key",
       "request_timeout": 300,
       "api_base": "https://api.openai.com/v1"
@@ -193,7 +196,7 @@ picoclaw onboard
   ],
   "agents": {
     "defaults": {
-      "model_name": "gpt4"
+      "model_name": "gpt-5.4"
     }
   },
   "channels": {
@@ -918,8 +921,9 @@ HEARTBEAT_OK 応答         ユーザーが直接結果を受け取る
 | **OpenRouter** | `openrouter/` | `https://openrouter.ai/api/v1` | OpenAI | [キーを取得](https://openrouter.ai/keys) |
 | **VLLM** | `vllm/` | `http://localhost:8000/v1` | OpenAI | ローカル |
 | **Cerebras** | `cerebras/` | `https://api.cerebras.ai/v1` | OpenAI | [キーを取得](https://cerebras.ai) |
-| **Volcengine** | `volcengine/` | `https://ark.cn-beijing.volces.com/api/v3` | OpenAI | [キーを取得](https://console.volcengine.com) |
+| **VolcEngine (Doubao)** | `volcengine/` | `https://ark.cn-beijing.volces.com/api/v3` | OpenAI | [キーを取得](https://console.volcengine.com) |
 | **ShengsuanYun** | `shengsuanyun/` | `https://router.shengsuanyun.com/api/v1` | OpenAI | - |
+| **BytePlus**        | `byteplus/`       | `https://ark.ap-southeast.bytepluses.com/api/v3`    | OpenAI    | [キーを取得](https://console.volcengine.com)                     |
 | **LongCat**         | `longcat/`        | `https://api.longcat.chat/openai`                   | OpenAI    | [キーを取得](https://longcat.chat/platform)                      |
 | **Antigravity** | `antigravity/` | Google Cloud | カスタム | OAuthのみ |
 | **GitHub Copilot** | `github-copilot/` | `localhost:4321` | gRPC | - |
@@ -930,8 +934,13 @@ HEARTBEAT_OK 応答         ユーザーが直接結果を受け取る
 {
   "model_list": [
     {
-      "model_name": "gpt-5.2",
-      "model": "openai/gpt-5.2",
+      "model_name": "ark-code-latest",
+      "model": "volcengine/ark-code-latest",
+      "api_key": "sk-your-api-key"
+    },
+    {
+      "model_name": "gpt-5.4",
+      "model": "openai/gpt-5.4",
       "api_key": "sk-your-openai-key"
     },
     {
@@ -947,7 +956,7 @@ HEARTBEAT_OK 応答         ユーザーが直接結果を受け取る
   ],
   "agents": {
     "defaults": {
-      "model": "gpt-5.2"
+      "model": "gpt-5.4"
     }
   }
 }
@@ -958,8 +967,17 @@ HEARTBEAT_OK 応答         ユーザーが直接結果を受け取る
 **OpenAI**
 ```json
 {
-  "model_name": "gpt-5.2",
-  "model": "openai/gpt-5.2",
+  "model_name": "gpt-5.4",
+  "model": "openai/gpt-5.4",
+  "api_key": "sk-..."
+}
+```
+
+**VolcEngine (Doubao)**
+```json
+{
+  "model_name": "ark-code-latest",
+  "model": "volcengine/ark-code-latest",
   "api_key": "sk-..."
 }
 ```
@@ -1002,14 +1020,14 @@ HEARTBEAT_OK 応答         ユーザーが直接結果を受け取る
 {
   "model_list": [
     {
-      "model_name": "gpt-5.2",
-      "model": "openai/gpt-5.2",
+      "model_name": "gpt-5.4",
+      "model": "openai/gpt-5.4",
       "api_base": "https://api1.example.com/v1",
       "api_key": "sk-key1"
     },
     {
-      "model_name": "gpt-5.2",
-      "model": "openai/gpt-5.2",
+      "model_name": "gpt-5.4",
+      "model": "openai/gpt-5.4",
       "api_base": "https://api2.example.com/v1",
       "api_key": "sk-key2"
     }
@@ -1120,9 +1138,16 @@ Web 検索を有効にするには：
 | サービス | 無料枠 | ユースケース |
 |---------|--------|------------|
 | **OpenRouter** | 月 200K トークン | 複数モデル（Claude, GPT-4 など） |
-| **Zhipu** | 月 200K トークン | 中国ユーザー向け最適 |
+| **Volcengine CodingPlan** | 9.9元/初月 | 中国ユーザーに最適、複数のSOTAモデル（Doubao、DeepSeek等） |
+| **Zhipu** | 月 200K トークン | 中国ユーザーに適している |
 | **Qwen** | 無料枠あり | 通義千問 (Qwen) |
 | **Brave Search** | 月 2000 クエリ | Web 検索機能 |
 | **Tavily** | 月 1000 クエリ | AI エージェント検索最適化 |
 | **Groq** | 無料枠あり | 高速推論（Llama, Mixtral） |
 | **Cerebras** | 無料枠あり | 高速推論（Llama, Qwen など） |
+
+---
+
+<div align="center">
+  <img src="assets/logo.jpg" alt="PicoClaw Meme" width="512">
+</div>
diff --git a/README.md b/README.md
index 55e9fb187..ebcd6dddf 100644
--- a/README.md
+++ b/README.md
@@ -1,5 +1,5 @@
 <div align="center">
-  <img src="assets/logo.jpg" alt="PicoClaw" width="512">
+  <img src="assets/logo.webp" alt="PicoClaw" width="512">
 
   <h1>PicoClaw: Ultra-Efficient AI Assistant in Go</h1>
 
@@ -227,9 +227,7 @@ docker compose -f docker/docker-compose.yml --profile gateway up -d
 ### 🚀 Quick Start
 
 > [!TIP]
-> Set your API key in `~/.picoclaw/config.json`.
-> Get API keys: [OpenRouter](https://openrouter.ai/keys) (LLM) · [Zhipu](https://open.bigmodel.cn/usercenter/proj-mgmt/apikeys) (LLM)
-> Web Search is **optional** - get free [Tavily API](https://tavily.com) (1000 free queries/month), [SearXNG](https://github.com/searxng/searxng) (free, self-hosted) or [Brave Search API](https://brave.com/search/api) (2000 free queries/month) or use built-in auto fallback.
+> Set your API Key in `~/.picoclaw/config.json`. Get API Keys: [Volcengine (CodingPlan)](https://console.volcengine.com) (LLM) · [OpenRouter](https://openrouter.ai/keys) (LLM) · [Zhipu](https://open.bigmodel.cn/usercenter/proj-mgmt/apikeys) (LLM). Web search is optional — get a free [Tavily API](https://tavily.com) (1000 free queries/month) or [Brave Search API](https://brave.com/search/api) (2000 free queries/month).
 
 **1. Initialize**
 
@@ -244,7 +242,7 @@ picoclaw onboard
   "agents": {
     "defaults": {
       "workspace": "~/.picoclaw/workspace",
-      "model_name": "gpt4",
+      "model_name": "gpt-5.4",
       "max_tokens": 8192,
       "temperature": 0.7,
       "max_tool_iterations": 20
@@ -252,8 +250,13 @@ picoclaw onboard
   },
   "model_list": [
     {
-      "model_name": "gpt4",
-      "model": "openai/gpt-5.2",
+      "model_name": "ark-code-latest",
+      "model": "volcengine/ark-code-latest",
+      "api_key": "sk-your-api-key"
+    },
+    {
+      "model_name": "gpt-5.4",
+      "model": "openai/gpt-5.4",
       "api_key": "your-api-key",
       "request_timeout": 300
     },
@@ -1030,8 +1033,9 @@ This design also enables **multi-agent support** with flexible provider selectio
 | **LiteLLM Proxy**   | `litellm/`        | `http://localhost:4000/v1`                          | OpenAI    | Your LiteLLM proxy key                                            |
 | **VLLM**            | `vllm/`           | `http://localhost:8000/v1`                          | OpenAI    | Local                                                            |
 | **Cerebras**        | `cerebras/`       | `https://api.cerebras.ai/v1`                        | OpenAI    | [Get Key](https://cerebras.ai)                                   |
-| **火山引擎**        | `volcengine/`     | `https://ark.cn-beijing.volces.com/api/v3`          | OpenAI    | [Get Key](https://console.volcengine.com)                        |
+| **VolcEngine (Doubao)** | `volcengine/`     | `https://ark.cn-beijing.volces.com/api/v3`          | OpenAI    | [Get Key](https://console.volcengine.com)                        |
 | **神算云**          | `shengsuanyun/`   | `https://router.shengsuanyun.com/api/v1`            | OpenAI    | -                                                                |
+| **BytePlus**        | `byteplus/`       | `https://ark.ap-southeast.bytepluses.com/api/v3`    | OpenAI    | [Get Key](https://console.volcengine.com)                        |
 | **Vivgrid**         | `vivgrid/`        | `https://api.vivgrid.com/v1`                        | OpenAI    | [Get Key](https://vivgrid.com)                                   |
 | **LongCat**         | `longcat/`        | `https://api.longcat.chat/openai`                   | OpenAI    | [Get Key](https://longcat.chat/platform)                         |
 | **Antigravity**     | `antigravity/`    | Google Cloud                                        | Custom    | OAuth only                                                       |
@@ -1043,8 +1047,13 @@ This design also enables **multi-agent support** with flexible provider selectio
 {
   "model_list": [
     {
-      "model_name": "gpt-5.2",
-      "model": "openai/gpt-5.2",
+      "model_name": "ark-code-latest",
+      "model": "volcengine/ark-code-latest",
+      "api_key": "sk-your-api-key"
+    },
+    {
+      "model_name": "gpt-5.4",
+      "model": "openai/gpt-5.4",
       "api_key": "sk-your-openai-key"
     },
     {
@@ -1060,7 +1069,7 @@ This design also enables **multi-agent support** with flexible provider selectio
   ],
   "agents": {
     "defaults": {
-      "model": "gpt-5.2"
+      "model": "gpt-5.4"
     }
   }
 }
@@ -1072,8 +1081,18 @@ This design also enables **multi-agent support** with flexible provider selectio
 
 ```json
 {
-  "model_name": "gpt-5.2",
-  "model": "openai/gpt-5.2",
+  "model_name": "gpt-5.4",
+  "model": "openai/gpt-5.4",
+  "api_key": "sk-..."
+}
+```
+
+**VolcEngine (Doubao)**
+
+```json
+{
+  "model_name": "ark-code-latest",
+  "model": "volcengine/ark-code-latest",
   "api_key": "sk-..."
 }
 ```
@@ -1152,14 +1171,14 @@ Configure multiple endpoints for the same model name—PicoClaw will automatical
 {
   "model_list": [
     {
-      "model_name": "gpt-5.2",
-      "model": "openai/gpt-5.2",
+      "model_name": "gpt-5.4",
+      "model": "openai/gpt-5.4",
       "api_base": "https://api1.example.com/v1",
       "api_key": "sk-key1"
     },
     {
-      "model_name": "gpt-5.2",
-      "model": "openai/gpt-5.2",
+      "model_name": "gpt-5.4",
+      "model": "openai/gpt-5.4",
       "api_base": "https://api2.example.com/v1",
       "api_key": "sk-key2"
     }
@@ -1499,9 +1518,16 @@ This happens when another instance of the bot is running. Make sure only one `pi
 | Service          | Free Tier                | Use Case                              |
 | ---------------- | ------------------------ | ------------------------------------- |
 | **OpenRouter**   | 200K tokens/month        | Multiple models (Claude, GPT-4, etc.) |
-| **Zhipu**        | 200K tokens/month        | Best for Chinese users                |
+| **Volcengine CodingPlan** | ¥9.9/first month | Best for Chinese users, multiple SOTA models (Doubao, DeepSeek, etc.) |
+| **Zhipu**        | 200K tokens/month        | Suitable for Chinese users                |
 | **Brave Search** | Paid ($5/1000 queries)   | Web search functionality              |
 | **SearXNG**      | Unlimited (self-hosted)  | Privacy-focused metasearch (70+ engines) |
 | **Groq**         | Free tier available      | Fast inference (Llama, Mixtral)       |
 | **Cerebras**     | Free tier available      | Fast inference (Llama, Qwen, etc.)    |
 | **LongCat**      | Up to 5M tokens/day      | Fast inference (free tier)            |
+
+---
+
+<div align="center">
+  <img src="assets/logo.jpg" alt="PicoClaw Meme" width="512">
+</div>
diff --git a/README.pt-br.md b/README.pt-br.md
index 066d71d6a..474cb199c 100644
--- a/README.pt-br.md
+++ b/README.pt-br.md
@@ -1,5 +1,5 @@
 <div align="center">
-<img src="assets/logo.jpg" alt="PicoClaw" width="512">
+<img src="assets/logo.webp" alt="PicoClaw" width="512">
 
 <h1>PicoClaw: Assistente de IA Ultra-Eficiente em Go</h1>
 
@@ -207,9 +207,7 @@ docker compose -f docker/docker-compose.yml --profile gateway up -d
 ### 🚀 Início Rápido
 
 > [!TIP]
-> Configure sua API key em `~/.picoclaw/config.json`.
-> Obtenha API keys: [OpenRouter](https://openrouter.ai/keys) (LLM) · [Zhipu](https://open.bigmodel.cn/usercenter/proj-mgmt/apikeys) (LLM)
-> Busca web e **opcional** — obtenha a [Brave Search API](https://brave.com/search/api) gratuita (2000 consultas grátis/mês) ou use o fallback automático integrado.
+> Configure sua API key em `~/.picoclaw/config.json`. Obtenha API keys: [Volcengine (CodingPlan)](https://console.volcengine.com) (LLM) · [OpenRouter](https://openrouter.ai/keys) (LLM) · [Zhipu](https://open.bigmodel.cn/usercenter/proj-mgmt/apikeys) (LLM). Busca web é **opcional** — obtenha a [API Tavily](https://tavily.com) gratuita (1000 consultas grátis/mês) ou a [Brave Search API](https://brave.com/search/api) (2000 consultas grátis/mês).
 
 **1. Inicializar**
 
@@ -223,8 +221,13 @@ picoclaw onboard
 {
   "model_list": [
     {
-      "model_name": "gpt4",
-      "model": "openai/gpt-5.2",
+      "model_name": "ark-code-latest",
+      "model": "volcengine/ark-code-latest",
+      "api_key": "sk-your-api-key"
+    },
+    {
+      "model_name": "gpt-5.4",
+      "model": "openai/gpt-5.4",
       "api_key": "sk-your-openai-key",
       "request_timeout": 300,
       "api_base": "https://api.openai.com/v1"
@@ -232,7 +235,7 @@ picoclaw onboard
   ],
   "agents": {
     "defaults": {
-      "model_name": "gpt4"
+      "model_name": "gpt-5.4"
     }
   },
   "tools": {
@@ -973,8 +976,9 @@ Este design também possibilita o **suporte multi-agent** com seleção flexíve
 | **OpenRouter** | `openrouter/` | `https://openrouter.ai/api/v1` | OpenAI | [Obter Chave](https://openrouter.ai/keys) |
 | **VLLM** | `vllm/` | `http://localhost:8000/v1` | OpenAI | Local |
 | **Cerebras** | `cerebras/` | `https://api.cerebras.ai/v1` | OpenAI | [Obter Chave](https://cerebras.ai) |
-| **Volcengine** | `volcengine/` | `https://ark.cn-beijing.volces.com/api/v3` | OpenAI | [Obter Chave](https://console.volcengine.com) |
+| **VolcEngine (Doubao)** | `volcengine/` | `https://ark.cn-beijing.volces.com/api/v3` | OpenAI | [Obter Chave](https://console.volcengine.com) |
 | **ShengsuanYun** | `shengsuanyun/` | `https://router.shengsuanyun.com/api/v1` | OpenAI | - |
+| **BytePlus**        | `byteplus/`       | `https://ark.ap-southeast.bytepluses.com/api/v3`    | OpenAI    | [Obter Chave](https://console.volcengine.com)                    |
 | **LongCat**         | `longcat/`        | `https://api.longcat.chat/openai`                   | OpenAI    | [Obter Chave](https://longcat.chat/platform)                     |
 | **Antigravity** | `antigravity/` | Google Cloud | Custom | Apenas OAuth |
 | **GitHub Copilot** | `github-copilot/` | `localhost:4321` | gRPC | - |
@@ -985,8 +989,13 @@ Este design também possibilita o **suporte multi-agent** com seleção flexíve
 {
   "model_list": [
     {
-      "model_name": "gpt-5.2",
-      "model": "openai/gpt-5.2",
+      "model_name": "ark-code-latest",
+      "model": "volcengine/ark-code-latest",
+      "api_key": "sk-your-api-key"
+    },
+    {
+      "model_name": "gpt-5.4",
+      "model": "openai/gpt-5.4",
       "api_key": "sk-your-openai-key"
     },
     {
@@ -1002,7 +1011,7 @@ Este design também possibilita o **suporte multi-agent** com seleção flexíve
   ],
   "agents": {
     "defaults": {
-      "model": "gpt-5.2"
+      "model": "gpt-5.4"
     }
   }
 }
@@ -1013,8 +1022,17 @@ Este design também possibilita o **suporte multi-agent** com seleção flexíve
 **OpenAI**
 ```json
 {
-  "model_name": "gpt-5.2",
-  "model": "openai/gpt-5.2",
+  "model_name": "gpt-5.4",
+  "model": "openai/gpt-5.4",
+  "api_key": "sk-..."
+}
+```
+
+**VolcEngine (Doubao)**
+```json
+{
+  "model_name": "ark-code-latest",
+  "model": "volcengine/ark-code-latest",
   "api_key": "sk-..."
 }
 ```
@@ -1057,14 +1075,14 @@ Configure vários endpoints para o mesmo nome de modelo—PicoClaw fará round-r
 {
   "model_list": [
     {
-      "model_name": "gpt-5.2",
-      "model": "openai/gpt-5.2",
+      "model_name": "gpt-5.4",
+      "model": "openai/gpt-5.4",
       "api_base": "https://api1.example.com/v1",
       "api_key": "sk-key1"
     },
     {
-      "model_name": "gpt-5.2",
-      "model": "openai/gpt-5.2",
+      "model_name": "gpt-5.4",
+      "model": "openai/gpt-5.4",
       "api_base": "https://api2.example.com/v1",
       "api_key": "sk-key2"
     }
@@ -1196,7 +1214,14 @@ Isso acontece quando outra instância do bot está em execução. Certifique-se
 | Serviço | Plano Gratuito | Caso de Uso |
 | --- | --- | --- |
 | **OpenRouter** | 200K tokens/mês | Múltiplos modelos (Claude, GPT-4, etc.) |
-| **Zhipu** | 200K tokens/mês | Melhor para usuários chineses |
+| **Volcengine CodingPlan** | ¥9,9/primeiro mês | Ideal para usuários chineses, múltiplos modelos SOTA (Doubao, DeepSeek, etc.) |
+| **Zhipu** | 200K tokens/mês | Adequado para usuários chineses |
 | **Brave Search** | 2000 consultas/mês | Funcionalidade de busca web |
 | **Groq** | Plano gratuito disponível | Inferência ultra-rápida (Llama, Mixtral) |
 | **Cerebras** | Plano gratuito disponível | Inferência ultra-rápida (Llama 3.3 70B) |
+
+---
+
+<div align="center">
+  <img src="assets/logo.jpg" alt="PicoClaw Meme" width="512">
+</div>
diff --git a/README.vi.md b/README.vi.md
index 66573a1c5..38eed4d4d 100644
--- a/README.vi.md
+++ b/README.vi.md
@@ -1,5 +1,5 @@
 <div align="center">
-<img src="assets/logo.jpg" alt="PicoClaw" width="512">
+<img src="assets/logo.webp" alt="PicoClaw" width="512">
 
 <h1>PicoClaw: Trợ lý AI Siêu Nhẹ viết bằng Go</h1>
 
@@ -187,9 +187,7 @@ docker compose -f docker/docker-compose.yml --profile gateway up -d
 ### 🚀 Bắt đầu nhanh
 
 > [!TIP]
-> Thiết lập API key trong `~/.picoclaw/config.json`.
-> Lấy API key: [OpenRouter](https://openrouter.ai/keys) (LLM) · [Zhipu](https://open.bigmodel.cn/usercenter/proj-mgmt/apikeys) (LLM)
-> Tìm kiếm web là **tùy chọn** — lấy [Brave Search API](https://brave.com/search/api) miễn phí (2000 truy vấn/tháng) hoặc dùng tính năng auto fallback tích hợp sẵn.
+> Thiết lập API key trong `~/.picoclaw/config.json`. Lấy API key: [Volcengine (CodingPlan)](https://console.volcengine.com) (LLM) · [OpenRouter](https://openrouter.ai/keys) (LLM) · [Zhipu](https://open.bigmodel.cn/usercenter/proj-mgmt/apikeys) (LLM). Tìm kiếm web là **tùy chọn** — lấy [Tavily API](https://tavily.com) miễn phí (1000 truy vấn/tháng) hoặc [Brave Search API](https://brave.com/search/api) (2000 truy vấn/tháng).
 
 **1. Khởi tạo**
 
@@ -203,8 +201,13 @@ picoclaw onboard
 {
   "model_list": [
     {
-      "model_name": "gpt4",
-      "model": "openai/gpt-5.2",
+      "model_name": "ark-code-latest",
+      "model": "volcengine/ark-code-latest",
+      "api_key": "sk-your-api-key"
+    },
+    {
+      "model_name": "gpt-5.4",
+      "model": "openai/gpt-5.4",
       "api_key": "sk-your-openai-key",
       "request_timeout": 300,
       "api_base": "https://api.openai.com/v1"
@@ -942,8 +945,9 @@ Thiết kế này cũng cho phép **hỗ trợ đa tác nhân** với lựa ch
 | **OpenRouter** | `openrouter/` | `https://openrouter.ai/api/v1` | OpenAI | [Lấy Khóa](https://openrouter.ai/keys) |
 | **VLLM** | `vllm/` | `http://localhost:8000/v1` | OpenAI | Local |
 | **Cerebras** | `cerebras/` | `https://api.cerebras.ai/v1` | OpenAI | [Lấy Khóa](https://cerebras.ai) |
-| **Volcengine** | `volcengine/` | `https://ark.cn-beijing.volces.com/api/v3` | OpenAI | [Lấy Khóa](https://console.volcengine.com) |
+| **VolcEngine (Doubao)** | `volcengine/` | `https://ark.cn-beijing.volces.com/api/v3` | OpenAI | [Lấy Khóa](https://console.volcengine.com) |
 | **ShengsuanYun** | `shengsuanyun/` | `https://router.shengsuanyun.com/api/v1` | OpenAI | - |
+| **BytePlus**        | `byteplus/`       | `https://ark.ap-southeast.bytepluses.com/api/v3`    | OpenAI    | [Lấy Khóa](https://console.volcengine.com)                      |
 | **LongCat**         | `longcat/`        | `https://api.longcat.chat/openai`                   | OpenAI    | [Lấy Key](https://longcat.chat/platform)                        |
 | **Antigravity** | `antigravity/` | Google Cloud | Tùy chỉnh | Chỉ OAuth |
 | **GitHub Copilot** | `github-copilot/` | `localhost:4321` | gRPC | - |
@@ -954,8 +958,13 @@ Thiết kế này cũng cho phép **hỗ trợ đa tác nhân** với lựa ch
 {
   "model_list": [
     {
-      "model_name": "gpt-5.2",
-      "model": "openai/gpt-5.2",
+      "model_name": "ark-code-latest",
+      "model": "volcengine/ark-code-latest",
+      "api_key": "sk-your-api-key"
+    },
+    {
+      "model_name": "gpt-5.4",
+      "model": "openai/gpt-5.4",
       "api_key": "sk-your-openai-key"
     },
     {
@@ -971,7 +980,7 @@ Thiết kế này cũng cho phép **hỗ trợ đa tác nhân** với lựa ch
   ],
   "agents": {
     "defaults": {
-      "model": "gpt-5.2"
+      "model": "gpt-5.4"
     }
   }
 }
@@ -982,8 +991,17 @@ Thiết kế này cũng cho phép **hỗ trợ đa tác nhân** với lựa ch
 **OpenAI**
 ```json
 {
-  "model_name": "gpt-5.2",
-  "model": "openai/gpt-5.2",
+  "model_name": "gpt-5.4",
+  "model": "openai/gpt-5.4",
+  "api_key": "sk-..."
+}
+```
+
+**VolcEngine (Doubao)**
+```json
+{
+  "model_name": "ark-code-latest",
+  "model": "volcengine/ark-code-latest",
   "api_key": "sk-..."
 }
 ```
@@ -1026,14 +1044,14 @@ Thiết kế này cũng cho phép **hỗ trợ đa tác nhân** với lựa ch
 {
   "model_list": [
     {
-      "model_name": "gpt-5.2",
-      "model": "openai/gpt-5.2",
+      "model_name": "gpt-5.4",
+      "model": "openai/gpt-5.4",
       "api_base": "https://api1.example.com/v1",
       "api_key": "sk-key1"
     },
     {
-      "model_name": "gpt-5.2",
-      "model": "openai/gpt-5.2",
+      "model_name": "gpt-5.4",
+      "model": "openai/gpt-5.4",
       "api_base": "https://api2.example.com/v1",
       "api_key": "sk-key2"
     }
@@ -1165,6 +1183,13 @@ Một số nhà cung cấp (như Zhipu) có bộ lọc nội dung nghiêm ngặt
 | Dịch vụ | Gói miễn phí | Trường hợp sử dụng |
 | --- | --- | --- |
 | **OpenRouter** | 200K tokens/tháng | Đa model (Claude, GPT-4, v.v.) |
-| **Zhipu** | 200K tokens/tháng | Tốt nhất cho người dùng Trung Quốc |
+| **Volcengine CodingPlan** | ¥9.9/tháng đầu | Tốt nhất cho người dùng Trung Quốc, nhiều mô hình SOTA (Doubao, DeepSeek, v.v.) |
+| **Zhipu** | 200K tokens/tháng | Phù hợp cho người dùng Trung Quốc |
 | **Brave Search** | 2000 truy vấn/tháng | Chức năng tìm kiếm web |
 | **Groq** | Có gói miễn phí | Suy luận siêu nhanh (Llama, Mixtral) |
+
+---
+
+<div align="center">
+  <img src="assets/logo.jpg" alt="PicoClaw Meme" width="512">
+</div>
diff --git a/README.zh.md b/README.zh.md
index a3a4c7f5f..6395b1e7b 100644
--- a/README.zh.md
+++ b/README.zh.md
@@ -1,5 +1,5 @@
 <div align="center">
-<img src="assets/logo.jpg" alt="PicoClaw" width="512">
+<img src="assets/logo.webp" alt="PicoClaw" width="512">
 
 <h1>PicoClaw: 基于Go语言的超高效 AI 助手</h1>
 
@@ -208,9 +208,7 @@ docker compose -f docker/docker-compose.yml --profile gateway up -d
 ### 🚀 快速开始
 
 > [!TIP]
-> 在 `~/.picoclaw/config.json` 中设置您的 API Key。
-> 获取 API Key: [OpenRouter](https://openrouter.ai/keys) (LLM) · [Zhipu (智谱)](https://open.bigmodel.cn/usercenter/proj-mgmt/apikeys) (LLM)
-> 网络搜索是 **可选的** - 获取免费的 [Tavily API](https://tavily.com) (每月 1000 次免费查询) 或 [Brave Search API](https://brave.com/search/api) (每月 2000 次免费查询)
+> 在 `~/.picoclaw/config.json` 中设置您的 API Key。获取 API Key: [火山引擎 (CodingPlan)](https://console.volcengine.com) (LLM) · [OpenRouter](https://openrouter.ai/keys) (LLM) · [Zhipu (智谱)](https://open.bigmodel.cn/usercenter/proj-mgmt/apikeys) (LLM)。网络搜索是 **可选的** — 获取免费的 [Tavily API](https://tavily.com) (每月 1000 次免费查询) 或 [Brave Search API](https://brave.com/search/api) (每月 2000 次免费查询)。
 
 **1. 初始化 (Initialize)**
 
@@ -226,7 +224,7 @@ picoclaw onboard
   "agents": {
     "defaults": {
       "workspace": "~/.picoclaw/workspace",
-      "model_name": "gpt4",
+      "model_name": "gpt-5.4",
       "max_tokens": 8192,
       "temperature": 0.7,
       "max_tool_iterations": 20
@@ -234,8 +232,13 @@ picoclaw onboard
   },
   "model_list": [
     {
-      "model_name": "gpt4",
-      "model": "openai/gpt-5.2",
+      "model_name": "ark-code-latest",
+      "model": "volcengine/ark-code-latest",
+      "api_key": "sk-your-api-key"
+    },
+    {
+      "model_name": "gpt-5.4",
+      "model": "openai/gpt-5.4",
       "api_key": "your-api-key",
       "request_timeout": 300
     },
@@ -514,8 +517,9 @@ Agent 读取 HEARTBEAT.md
 | **OpenRouter**      | `openrouter/`     | `https://openrouter.ai/api/v1`                      | OpenAI    | [获取密钥](https://openrouter.ai/keys)                            |
 | **VLLM**            | `vllm/`           | `http://localhost:8000/v1`                          | OpenAI    | 本地                                                              |
 | **Cerebras**        | `cerebras/`       | `https://api.cerebras.ai/v1`                        | OpenAI    | [获取密钥](https://cerebras.ai)                                   |
-| **火山引擎**        | `volcengine/`     | `https://ark.cn-beijing.volces.com/api/v3`          | OpenAI    | [获取密钥](https://console.volcengine.com)                        |
+| **火山引擎（Doubao）**        | `volcengine/`     | `https://ark.cn-beijing.volces.com/api/v3`          | OpenAI    | [获取密钥](https://console.volcengine.com)                        |
 | **神算云**          | `shengsuanyun/`   | `https://router.shengsuanyun.com/api/v1`            | OpenAI    | -                                                                 |
+| **BytePlus**        | `byteplus/`       | `https://ark.ap-southeast.bytepluses.com/api/v3`    | OpenAI    | [获取密钥](https://console.volcengine.com)                        |
 | **LongCat**         | `longcat/`        | `https://api.longcat.chat/openai`                   | OpenAI    | [获取密钥](https://longcat.chat/platform)                        |
 | **Antigravity**     | `antigravity/`    | Google Cloud                                        | 自定义    | 仅 OAuth                                                          |
 | **GitHub Copilot**  | `github-copilot/` | `localhost:4321`                                    | gRPC      | -                                                                 |
@@ -526,8 +530,13 @@ Agent 读取 HEARTBEAT.md
 {
   "model_list": [
     {
-      "model_name": "gpt-5.2",
-      "model": "openai/gpt-5.2",
+      "model_name": "ark-code-latest",
+      "model": "volcengine/ark-code-latest",
+      "api_key": "sk-your-api-key"
+    },
+    {
+      "model_name": "gpt-5.4",
+      "model": "openai/gpt-5.4",
       "api_key": "sk-your-openai-key"
     },
     {
@@ -543,7 +552,7 @@ Agent 读取 HEARTBEAT.md
   ],
   "agents": {
     "defaults": {
-      "model": "gpt-5.2"
+      "model": "gpt-5.4"
     }
   }
 }
@@ -555,8 +564,18 @@ Agent 读取 HEARTBEAT.md
 
 ```json
 {
-  "model_name": "gpt-5.2",
-  "model": "openai/gpt-5.2",
+  "model_name": "gpt-5.4",
+  "model": "openai/gpt-5.4",
+  "api_key": "sk-..."
+}
+```
+
+**火山引擎（Doubao）**
+
+```json
+{
+  "model_name": "ark-code-latest",
+  "model": "volcengine/ark-code-latest",
   "api_key": "sk-..."
 }
 ```
@@ -622,14 +641,14 @@ Agent 读取 HEARTBEAT.md
 {
   "model_list": [
     {
-      "model_name": "gpt-5.2",
-      "model": "openai/gpt-5.2",
+      "model_name": "gpt-5.4",
+      "model": "openai/gpt-5.4",
       "api_base": "https://api1.example.com/v1",
       "api_key": "sk-key1"
     },
     {
-      "model_name": "gpt-5.2",
-      "model": "openai/gpt-5.2",
+      "model_name": "gpt-5.4",
+      "model": "openai/gpt-5.4",
       "api_base": "https://api2.example.com/v1",
       "api_key": "sk-key2"
     }
@@ -875,8 +894,15 @@ Discord: [https://discord.gg/V4sAZ9XWpN](https://discord.gg/V4sAZ9XWpN)
 | 服务 | 免费层级 | 适用场景 |
 | --- | --- | --- |
 | **OpenRouter** | 200K tokens/月 | 多模型聚合 (Claude, GPT-4 等) |
-| **智谱 (Zhipu)** | 200K tokens/月 | 最适合中国用户 |
+| **火山引擎 CodingPlan** | 9.9 元/首月 | 最适合国内用户，多种 SOTA 模型（豆包、DeepSeek 等） |
+| **智谱 (Zhipu)** | 200K tokens/月 | 适合中国用户 |
 | **Brave Search** | 2000 次查询/月 | 网络搜索功能 |
 | **Tavily** | 1000 次查询/月 | AI Agent 搜索优化 |
 | **Groq** | 提供免费层级 | 极速推理 (Llama, Mixtral) |
 | **LongCat** | 最多 5M tokens/天 | 推理速度快 (免费额度) |
+
+---
+
+<div align="center">
+  <img src="assets/logo.jpg" alt="PicoClaw Meme" width="512">
+</div>
diff --git a/assets/logo.webp b/assets/logo.webp
new file mode 100644
index 000000000..9333f7e1b
Binary files /dev/null and b/assets/logo.webp differ
diff --git a/cmd/picoclaw-launcher-tui/internal/ui/model.go b/cmd/picoclaw-launcher-tui/internal/ui/model.go
index 47ca5a355..698502058 100644
--- a/cmd/picoclaw-launcher-tui/internal/ui/model.go
+++ b/cmd/picoclaw-launcher-tui/internal/ui/model.go
@@ -49,7 +49,7 @@ func (s *appState) modelMenu() tview.Primitive {
 			Action: func() {
 				newName := s.nextAvailableModelName("new-model")
 				s.addModel(
-					picoclawconfig.ModelConfig{ModelName: newName, Model: "openai/gpt-5.2"},
+					picoclawconfig.ModelConfig{ModelName: newName, Model: "openai/gpt-5.4"},
 				)
 				s.push(
 					fmt.Sprintf("model-%d", len(s.config.ModelList)-1),
@@ -291,7 +291,7 @@ func refreshModelMenuFromState(menu *Menu, s *appState) {
 			Action: func() {
 				newName := s.nextAvailableModelName("new-model")
 				s.addModel(
-					picoclawconfig.ModelConfig{ModelName: newName, Model: "openai/gpt-5.2"},
+					picoclawconfig.ModelConfig{ModelName: newName, Model: "openai/gpt-5.4"},
 				)
 				s.push(fmt.Sprintf("model-%d", len(s.config.ModelList)-1), s.modelForm(len(s.config.ModelList)-1))
 			},
diff --git a/cmd/picoclaw/internal/auth/helpers.go b/cmd/picoclaw/internal/auth/helpers.go
index a0a229167..4bf132685 100644
--- a/cmd/picoclaw/internal/auth/helpers.go
+++ b/cmd/picoclaw/internal/auth/helpers.go
@@ -72,14 +72,14 @@ func authLoginOpenAI(useDeviceCode bool) error {
 		// If no openai in ModelList, add it
 		if !foundOpenAI {
 			appCfg.ModelList = append(appCfg.ModelList, config.ModelConfig{
-				ModelName:  "gpt-5.2",
-				Model:      "openai/gpt-5.2",
+				ModelName:  "gpt-5.4",
+				Model:      "openai/gpt-5.4",
 				AuthMethod: "oauth",
 			})
 		}
 
 		// Update default model to use OpenAI
-		appCfg.Agents.Defaults.ModelName = "gpt-5.2"
+		appCfg.Agents.Defaults.ModelName = "gpt-5.4"
 
 		if err = config.SaveConfig(internal.GetConfigPath(), appCfg); err != nil {
 			return fmt.Errorf("could not update config: %w", err)
@@ -90,7 +90,7 @@ func authLoginOpenAI(useDeviceCode bool) error {
 	if cred.AccountID != "" {
 		fmt.Printf("Account: %s\n", cred.AccountID)
 	}
-	fmt.Println("Default model set to: gpt-5.2")
+	fmt.Println("Default model set to: gpt-5.4")
 
 	return nil
 }
@@ -318,13 +318,13 @@ func authLoginPasteToken(provider string) error {
 			}
 			if !found {
 				appCfg.ModelList = append(appCfg.ModelList, config.ModelConfig{
-					ModelName:  "gpt-5.2",
-					Model:      "openai/gpt-5.2",
+					ModelName:  "gpt-5.4",
+					Model:      "openai/gpt-5.4",
 					AuthMethod: "token",
 				})
 			}
 			// Update default model
-			appCfg.Agents.Defaults.ModelName = "gpt-5.2"
+			appCfg.Agents.Defaults.ModelName = "gpt-5.4"
 		}
 		if err := config.SaveConfig(internal.GetConfigPath(), appCfg); err != nil {
 			return fmt.Errorf("could not update config: %w", err)
diff --git a/config/config.example.json b/config/config.example.json
index 1eea37683..b259df6f6 100644
--- a/config/config.example.json
+++ b/config/config.example.json
@@ -3,7 +3,7 @@
     "defaults": {
       "workspace": "~/.picoclaw/workspace",
       "restrict_to_workspace": true,
-      "model_name": "gpt4",
+      "model_name": "gpt-5.4",
       "max_tokens": 8192,
       "temperature": 0.7,
       "max_tool_iterations": 20,
@@ -13,8 +13,8 @@
   },
   "model_list": [
     {
-      "model_name": "gpt4",
-      "model": "openai/gpt-5.2",
+      "model_name": "gpt-5.4",
+      "model": "openai/gpt-5.4",
       "api_key": "sk-your-openai-key",
       "api_base": "https://api.openai.com/v1"
     },
@@ -41,14 +41,14 @@
       "api_key": "your-longcat-api-key"
     },
     {
-      "model_name": "loadbalanced-gpt4",
-      "model": "openai/gpt-5.2",
+      "model_name": "loadbalanced-gpt-5.4",
+      "model": "openai/gpt-5.4",
       "api_key": "sk-key1",
       "api_base": "https://api1.example.com/v1"
     },
     {
-      "model_name": "loadbalanced-gpt4",
-      "model": "openai/gpt-5.2",
+      "model_name": "loadbalanced-gpt-5.4",
+      "model": "openai/gpt-5.4",
       "api_key": "sk-key2",
       "api_base": "https://api2.example.com/v1"
     }
diff --git a/docs/design/provider-refactoring.md b/docs/design/provider-refactoring.md
index a214d9857..38f379c50 100644
--- a/docs/design/provider-refactoring.md
+++ b/docs/design/provider-refactoring.md
@@ -66,7 +66,7 @@ Problem: Agent needs to know both `provider` and `model`, adding complexity.
 Inspired by [LiteLLM](https://docs.litellm.ai/docs/proxy/configs) design:
 
 1. **Model-centric**: Users care about models, not providers
-2. **Protocol prefix**: Use `protocol/model_name` format, e.g., `openai/gpt-5.2`, `anthropic/claude-sonnet-4.6`
+2. **Protocol prefix**: Use `protocol/model_name` format, e.g., `openai/gpt-5.4`, `anthropic/claude-sonnet-4.6`
 3. **Configuration-driven**: Adding new Providers only requires config changes, no code changes
 
 ### 2.2 New Configuration Structure
@@ -81,8 +81,8 @@ Inspired by [LiteLLM](https://docs.litellm.ai/docs/proxy/configs) design:
       "api_key": "sk-xxx"
     },
     {
-      "model_name": "gpt-5.2",
-      "model": "openai/gpt-5.2",
+      "model_name": "gpt-5.4",
+      "model": "openai/gpt-5.4",
       "api_key": "sk-xxx"
     },
     {
@@ -128,7 +128,7 @@ type Config struct {
 type ModelConfig struct {
     // Required
     ModelName string `json:"model_name"`  // user-facing name (alias)
-    Model     string `json:"model"`       // protocol/model, e.g., openai/gpt-5.2
+    Model     string `json:"model"`       // protocol/model, e.g., openai/gpt-5.4
 
     // Common config
     APIBase   string `json:"api_base,omitempty"`
@@ -180,7 +180,7 @@ Identify protocol via prefix in `model` field:
       "model": "deepseek-chat"
     },
     "coder": {
-      "model": "gpt-5.2",
+      "model": "gpt-5.4",
       "system_prompt": "You are a coding assistant..."
     },
     "translator": {
@@ -200,7 +200,7 @@ Each Agent only needs to specify `model` (corresponds to `model_name` in `model_
 model_list:
   - model_name: gpt-4o
     litellm_params:
-      model: openai/gpt-5.2
+      model: openai/gpt-5.4
       api_key: xxx
   - model_name: my-custom
     litellm_params:
diff --git a/docs/migration/model-list-migration.md b/docs/migration/model-list-migration.md
index 0d4af719c..eed228d4d 100644
--- a/docs/migration/model-list-migration.md
+++ b/docs/migration/model-list-migration.md
@@ -40,7 +40,7 @@ The new `model_list` configuration offers several advantages:
   "agents": {
     "defaults": {
       "provider": "openai",
-      "model": "gpt-5.2"
+      "model": "gpt-5.4"
     }
   }
 }
@@ -53,7 +53,7 @@ The new `model_list` configuration offers several advantages:
   "model_list": [
     {
       "model_name": "gpt4",
-      "model": "openai/gpt-5.2",
+      "model": "openai/gpt-5.4",
       "api_key": "sk-your-openai-key",
       "api_base": "https://api.openai.com/v1"
     },
@@ -82,7 +82,7 @@ The `model` field uses a protocol prefix format: `[protocol/]model-identifier`
 
 | Prefix | Description | Example |
 |--------|-------------|---------|
-| `openai/` | OpenAI API (default) | `openai/gpt-5.2` |
+| `openai/` | OpenAI API (default) | `openai/gpt-5.4` |
 | `anthropic/` | Anthropic API | `anthropic/claude-opus-4` |
 | `antigravity/` | Google via Antigravity OAuth | `antigravity/gemini-2.0-flash` |
 | `gemini/` | Google Gemini API | `gemini/gemini-2.0-flash-exp` |
@@ -109,7 +109,7 @@ The `model` field uses a protocol prefix format: `[protocol/]model-identifier`
 | Field | Required | Description |
 |-------|----------|-------------|
 | `model_name` | Yes | User-facing alias for the model |
-| `model` | Yes | Protocol and model identifier (e.g., `openai/gpt-5.2`) |
+| `model` | Yes | Protocol and model identifier (e.g., `openai/gpt-5.4`) |
 | `api_base` | No | API endpoint URL |
 | `api_key` | No* | API authentication key |
 | `proxy` | No | HTTP proxy URL |
@@ -130,19 +130,19 @@ Configure multiple endpoints for the same model to distribute load:
   "model_list": [
     {
       "model_name": "gpt4",
-      "model": "openai/gpt-5.2",
+      "model": "openai/gpt-5.4",
       "api_key": "sk-key1",
       "api_base": "https://api1.example.com/v1"
     },
     {
       "model_name": "gpt4",
-      "model": "openai/gpt-5.2",
+      "model": "openai/gpt-5.4",
       "api_key": "sk-key2",
       "api_base": "https://api2.example.com/v1"
     },
     {
       "model_name": "gpt4",
-      "model": "openai/gpt-5.2",
+      "model": "openai/gpt-5.4",
       "api_key": "sk-key3",
       "api_base": "https://api3.example.com/v1"
     }
diff --git a/pkg/config/config_test.go b/pkg/config/config_test.go
index ad89d6d2e..1c93028c7 100644
--- a/pkg/config/config_test.go
+++ b/pkg/config/config_test.go
@@ -444,7 +444,7 @@ func TestLoadConfig_WebToolsProxy(t *testing.T) {
 	configPath := filepath.Join(tmpDir, "config.json")
 	configJSON := `{
   "agents": {"defaults":{"workspace":"./workspace","model":"gpt4","max_tokens":8192,"max_tool_iterations":20}},
-  "model_list": [{"model_name":"gpt4","model":"openai/gpt-5.2","api_key":"x"}],
+  "model_list": [{"model_name":"gpt4","model":"openai/gpt-5.4","api_key":"x"}],
   "tools": {"web":{"proxy":"http://127.0.0.1:7890"}}
 }`
 	if err := os.WriteFile(configPath, []byte(configJSON), 0o600); err != nil {
diff --git a/pkg/config/defaults.go b/pkg/config/defaults.go
index 492b22e3a..2a3e66043 100644
--- a/pkg/config/defaults.go
+++ b/pkg/config/defaults.go
@@ -194,8 +194,8 @@ func DefaultConfig() *Config {
 
 			// OpenAI - https://platform.openai.com/api-keys
 			{
-				ModelName: "gpt-5.2",
-				Model:     "openai/gpt-5.2",
+				ModelName: "gpt-5.4",
+				Model:     "openai/gpt-5.4",
 				APIBase:   "https://api.openai.com/v1",
 				APIKey:    "",
 			},
@@ -256,8 +256,8 @@ func DefaultConfig() *Config {
 				APIKey:    "",
 			},
 			{
-				ModelName: "openrouter-gpt-5.2",
-				Model:     "openrouter/openai/gpt-5.2",
+				ModelName: "openrouter-gpt-5.4",
+				Model:     "openrouter/openai/gpt-5.4",
 				APIBase:   "https://openrouter.ai/api/v1",
 				APIKey:    "",
 			},
@@ -287,6 +287,12 @@ func DefaultConfig() *Config {
 			},
 
 			// Volcengine (火山引擎) - https://console.volcengine.com/ark
+			{
+				ModelName: "ark-code-latest",
+				Model:     "volcengine/ark-code-latest",
+				APIBase:   "https://ark.cn-beijing.volces.com/api/v3",
+				APIKey:    "",
+			},
 			{
 				ModelName: "doubao-pro",
 				Model:     "volcengine/doubao-pro-32k",
@@ -311,8 +317,8 @@ func DefaultConfig() *Config {
 
 			// GitHub Copilot - https://github.com/settings/tokens
 			{
-				ModelName:  "copilot-gpt-5.2",
-				Model:      "github-copilot/gpt-5.2",
+				ModelName:  "copilot-gpt-5.4",
+				Model:      "github-copilot/gpt-5.4",
 				APIBase:    "http://localhost:4321",
 				AuthMethod: "oauth",
 			},
diff --git a/pkg/config/migration.go b/pkg/config/migration.go
index 8e693506b..af6391651 100644
--- a/pkg/config/migration.go
+++ b/pkg/config/migration.go
@@ -61,7 +61,7 @@ func ConvertProvidersToModelList(cfg *Config) []ModelConfig {
 				}
 				return ModelConfig{
 					ModelName:      "openai",
-					Model:          "openai/gpt-5.2",
+					Model:          "openai/gpt-5.4",
 					APIKey:         p.OpenAI.APIKey,
 					APIBase:        p.OpenAI.APIBase,
 					Proxy:          p.OpenAI.Proxy,
@@ -335,7 +335,7 @@ func ConvertProvidersToModelList(cfg *Config) []ModelConfig {
 				}
 				return ModelConfig{
 					ModelName:   "github-copilot",
-					Model:       "github-copilot/gpt-5.2",
+					Model:       "github-copilot/gpt-5.4",
 					APIBase:     p.GitHubCopilot.APIBase,
 					ConnectMode: p.GitHubCopilot.ConnectMode,
 				}, true
diff --git a/pkg/config/migration_test.go b/pkg/config/migration_test.go
index 807d93e49..0665ededa 100644
--- a/pkg/config/migration_test.go
+++ b/pkg/config/migration_test.go
@@ -31,8 +31,8 @@ func TestConvertProvidersToModelList_OpenAI(t *testing.T) {
 	if result[0].ModelName != "openai" {
 		t.Errorf("ModelName = %q, want %q", result[0].ModelName, "openai")
 	}
-	if result[0].Model != "openai/gpt-5.2" {
-		t.Errorf("Model = %q, want %q", result[0].Model, "openai/gpt-5.2")
+	if result[0].Model != "openai/gpt-5.4" {
+		t.Errorf("Model = %q, want %q", result[0].Model, "openai/gpt-5.4")
 	}
 	if result[0].APIKey != "sk-test-key" {
 		t.Errorf("APIKey = %q, want %q", result[0].APIKey, "sk-test-key")
@@ -384,8 +384,8 @@ func TestConvertProvidersToModelList_MultipleProviders_PreservesUserModel(t *tes
 	for _, mc := range result {
 		switch mc.ModelName {
 		case "openai":
-			if mc.Model != "openai/gpt-5.2" {
-				t.Errorf("OpenAI Model = %q, want %q (default)", mc.Model, "openai/gpt-5.2")
+			if mc.Model != "openai/gpt-5.4" {
+				t.Errorf("OpenAI Model = %q, want %q (default)", mc.Model, "openai/gpt-5.4")
 			}
 		case "deepseek":
 			if mc.Model != "deepseek/deepseek-reasoner" {
@@ -558,9 +558,9 @@ func TestConvertProvidersToModelList_NoProviderField_NoModel(t *testing.T) {
 // Tests for buildModelWithProtocol helper function
 
 func TestBuildModelWithProtocol_NoPrefix(t *testing.T) {
-	result := buildModelWithProtocol("openai", "gpt-5.2")
-	if result != "openai/gpt-5.2" {
-		t.Errorf("buildModelWithProtocol(openai, gpt-5.2) = %q, want %q", result, "openai/gpt-5.2")
+	result := buildModelWithProtocol("openai", "gpt-5.4")
+	if result != "openai/gpt-5.4" {
+		t.Errorf("buildModelWithProtocol(openai, gpt-5.4) = %q, want %q", result, "openai/gpt-5.4")
 	}
 }
 
diff --git a/pkg/providers/codex_cli_provider_test.go b/pkg/providers/codex_cli_provider_test.go
index 414e0844d..0f66e25f4 100644
--- a/pkg/providers/codex_cli_provider_test.go
+++ b/pkg/providers/codex_cli_provider_test.go
@@ -490,7 +490,7 @@ echo '{"type":"turn.completed"}'`
 	}
 
 	messages := []Message{{Role: "user", Content: "test"}}
-	_, err := p.Chat(context.Background(), messages, nil, "gpt-5.2-codex", nil)
+	_, err := p.Chat(context.Background(), messages, nil, "gpt-5.3-codex", nil)
 	if err != nil {
 		t.Fatalf("Chat() error: %v", err)
 	}
@@ -502,7 +502,7 @@ echo '{"type":"turn.completed"}'`
 	}
 	args := string(argsData)
 
-	if !strings.Contains(args, "-m gpt-5.2-codex") {
+	if !strings.Contains(args, "-m gpt-5.3-codex") {
 		t.Errorf("args should contain model flag, got: %s", args)
 	}
 	if !strings.Contains(args, "-C /tmp/test-workspace") {
diff --git a/pkg/providers/codex_provider.go b/pkg/providers/codex_provider.go
index 47618300a..cf5c2d876 100644
--- a/pkg/providers/codex_provider.go
+++ b/pkg/providers/codex_provider.go
@@ -16,7 +16,7 @@ import (
 )
 
 const (
-	codexDefaultModel        = "gpt-5.2"
+	codexDefaultModel        = "gpt-5.3-codex"
 	codexDefaultInstructions = "You are Codex, a coding assistant."
 )
 
diff --git a/pkg/providers/codex_provider_test.go b/pkg/providers/codex_provider_test.go
index 4157e53e9..dd5ad2637 100644
--- a/pkg/providers/codex_provider_test.go
+++ b/pkg/providers/codex_provider_test.go
@@ -568,7 +568,7 @@ func TestCodexProvider_ChatRoundTrip_ModelFallbackFromUnsupported(t *testing.T)
 	provider.client = createOpenAITestClient(server.URL, "test-token", "acc-123")
 
 	messages := []Message{{Role: "user", Content: "Hello"}}
-	resp, err := provider.Chat(t.Context(), messages, nil, "gpt-5.2", nil)
+	resp, err := provider.Chat(t.Context(), messages, nil, "gpt-5.3-codex", nil)
 	if err != nil {
 		t.Fatalf("Chat() error: %v", err)
 	}
@@ -599,7 +599,7 @@ func TestResolveCodexModel(t *testing.T) {
 			wantFallback: true,
 		},
 		{name: "non-openai prefixed", input: "glm-4.7", wantModel: codexDefaultModel, wantFallback: true},
-		{name: "openai prefix", input: "openai/gpt-5.2", wantModel: "gpt-5.2", wantFallback: false},
+		{name: "openai prefix", input: "openai/gpt-5.3-codex", wantModel: "gpt-5.3-codex", wantFallback: false},
 		{name: "direct gpt", input: "gpt-4o", wantModel: "gpt-4o", wantFallback: false},
 	}
 
diff --git a/web/backend/api/gateway_test.go b/web/backend/api/gateway_test.go
index 84d784a5a..d4265776a 100644
--- a/web/backend/api/gateway_test.go
+++ b/web/backend/api/gateway_test.go
@@ -247,7 +247,7 @@ func TestGatewayStartReady_OAuthModelRequiresStoredCredential(t *testing.T) {
 	}
 	cfg.ModelList = []config.ModelConfig{{
 		ModelName:  "openai-oauth",
-		Model:      "openai/gpt-5.2",
+		Model:      "openai/gpt-5.4",
 		AuthMethod: "oauth",
 	}}
 	cfg.Agents.Defaults.ModelName = "openai-oauth"
diff --git a/web/backend/api/models_test.go b/web/backend/api/models_test.go
index 7061eb3f7..2377b5b66 100644
--- a/web/backend/api/models_test.go
+++ b/web/backend/api/models_test.go
@@ -62,7 +62,7 @@ func TestHandleListModels_ConfiguredStatusUsesRuntimeProbesForLocalModels(t *tes
 	cfg.ModelList = []config.ModelConfig{
 		{
 			ModelName:  "openai-oauth",
-			Model:      "openai/gpt-5.2",
+			Model:      "openai/gpt-5.4",
 			AuthMethod: "oauth",
 		},
 		{
@@ -81,8 +81,8 @@ func TestHandleListModels_ConfiguredStatusUsesRuntimeProbesForLocalModels(t *tes
 			APIKey:    "remote-key",
 		},
 		{
-			ModelName:  "copilot-gpt-5.2",
-			Model:      "github-copilot/gpt-5.2",
+			ModelName:  "copilot-gpt-5.4",
+			Model:      "github-copilot/gpt-5.4",
 			APIBase:    "http://127.0.0.1:4321",
 			AuthMethod: "oauth",
 		},
@@ -128,7 +128,7 @@ func TestHandleListModels_ConfiguredStatusUsesRuntimeProbesForLocalModels(t *tes
 	if !got["vllm-remote"] {
 		t.Fatalf("remote vllm model configured = false, want true with api_key")
 	}
-	if !got["copilot-gpt-5.2"] {
+	if !got["copilot-gpt-5.4"] {
 		t.Fatalf("copilot model configured = false, want true when local bridge probe succeeds")
 	}
 	if len(openAIProbes) != 1 || openAIProbes[0] != "http://127.0.0.1:8000/v1|custom-model" {
diff --git a/web/backend/api/oauth.go b/web/backend/api/oauth.go
index 04cd595f2..919b47fbc 100644
--- a/web/backend/api/oauth.go
+++ b/web/backend/api/oauth.go
@@ -791,8 +791,8 @@ func defaultModelConfigForProvider(provider, authMethod string) config.ModelConf
 	switch provider {
 	case oauthProviderOpenAI:
 		return config.ModelConfig{
-			ModelName:  "gpt-5.2",
-			Model:      "openai/gpt-5.2",
+			ModelName:  "gpt-5.4",
+			Model:      "openai/gpt-5.4",
 			AuthMethod: authMethod,
 		}
 	case oauthProviderAnthropic:
diff --git a/web/backend/api/oauth_test.go b/web/backend/api/oauth_test.go
index 2103e1efc..7d63abbd4 100644
--- a/web/backend/api/oauth_test.go
+++ b/web/backend/api/oauth_test.go
@@ -168,8 +168,8 @@ func TestOAuthLogoutClearsCredentialAndConfig(t *testing.T) {
 	}
 	cfg.Providers.OpenAI.AuthMethod = "oauth"
 	cfg.ModelList = append(cfg.ModelList, config.ModelConfig{
-		ModelName:  "gpt-5.2",
-		Model:      "openai/gpt-5.2",
+		ModelName:  "gpt-5.4",
+		Model:      "openai/gpt-5.4",
 		AuthMethod: "oauth",
 	})
 	if err = config.SaveConfig(configPath, cfg); err != nil {
diff --git a/workspace/skills/summarize/SKILL.md b/workspace/skills/summarize/SKILL.md
index 766ab5d0b..ca7008e7a 100644
--- a/workspace/skills/summarize/SKILL.md
+++ b/workspace/skills/summarize/SKILL.md
@@ -59,7 +59,7 @@ Default model is `google/gemini-3-flash-preview` if none is set.
 Optional config file: `~/.summarize/config.json`
 
 ```json
-{ "model": "openai/gpt-5.2" }
+{ "model": "openai/gpt-5.4" }
 ```
 
 Optional services: