diff --git a/README.md b/README.md
index c84c3815..b2febb69 100644
--- a/README.md
+++ b/README.md
@@ -107,7 +107,7 @@ CowAgent supports all mainstream LLM providers. **Chat, vision, image generation
 | Provider | Featured Models | Chat | Vision | Image Gen | ASR | TTS | Embedding |
 | --- | --- | :-: | :-: | :-: | :-: | :-: | :-: |
 | [Claude](https://docs.cowagent.ai/models/claude) | claude-sonnet-5 / fable-5 | ✅ | ✅ | | | | |
-| [OpenAI](https://docs.cowagent.ai/models/openai) | gpt-5.5, o-series | ✅ | ✅ | ✅ | ✅ | ✅ | ✅ |
+| [OpenAI](https://docs.cowagent.ai/models/openai) | gpt-5.6 series | ✅ | ✅ | ✅ | ✅ | ✅ | ✅ |
 | [Gemini](https://docs.cowagent.ai/models/gemini) | gemini-3.5-flash | ✅ | ✅ | ✅ | | | |
 | [DeepSeek](https://docs.cowagent.ai/models/deepseek) | deepseek-v4-flash / pro | ✅ | | | | | |
 | [Qwen](https://docs.cowagent.ai/models/qwen) | qwen3.7-plus | ✅ | ✅ | ✅ | ✅ | ✅ | ✅ |
diff --git a/channel/web/web_channel.py b/channel/web/web_channel.py
index 5a0486a0..af94ce81 100644
--- a/channel/web/web_channel.py
+++ b/channel/web/web_channel.py
@@ -1703,7 +1703,7 @@ class ConfigHandler:
         # claude-sonnet-5 is the Claude default; claude-fable-5 follows right after it.
         const.CLAUDE_SONNET_5, const.CLAUDE_FABLE_5, const.CLAUDE_4_8_OPUS, const.CLAUDE_4_7_OPUS, const.CLAUDE_4_6_SONNET, const.CLAUDE_4_6_OPUS,
         const.GEMINI_35_FLASH, const.GEMINI_31_FLASH_LITE_PRE, const.GEMINI_31_PRO_PRE, const.GEMINI_3_FLASH_PRE,
-        const.GPT_55, const.GPT_54, const.GPT_54_MINI, const.GPT_54_NANO, const.GPT_5, const.GPT_41, const.GPT_4o,
+        const.GPT_56_LUNA, const.GPT_56_TERRA, const.GPT_56_SOL, const.GPT_55, const.GPT_54, const.GPT_54_MINI, const.GPT_54_NANO, const.GPT_5, const.GPT_41, const.GPT_4o,
         const.GLM_5_2, const.GLM_5_1, const.GLM_5_TURBO, const.GLM_5, const.GLM_4_7,
         const.QWEN37_PLUS, const.QWEN37_MAX, const.QWEN36_PLUS,
         const.DOUBAO_SEED_2_1_PRO, const.DOUBAO_SEED_2_1_TURBO, const.DOUBAO_SEED_2_CODE,
@@ -1762,7 +1762,7 @@ class ConfigHandler:
             "api_base_key": "open_ai_api_base",
             "api_base_default": "https://api.openai.com/v1",
             "api_base_placeholder": _PLACEHOLDER_V1,
-            "models": [const.GPT_55, const.GPT_54, const.GPT_54_MINI, const.GPT_54_NANO, const.GPT_5, const.GPT_41, const.GPT_4o],
+            "models": [const.GPT_56_LUNA, const.GPT_56_TERRA, const.GPT_56_SOL, const.GPT_55, const.GPT_54, const.GPT_54_MINI, const.GPT_54_NANO, const.GPT_5, const.GPT_41, const.GPT_4o],
         }),
         ("zhipu", {
             "label": {"zh": "智谱AI", "en": "GLM"},
@@ -2338,9 +2338,12 @@ class ModelsHandler:
     # Anything not listed here intentionally hides the model dropdown so
     # users cannot pin a chat-only model and silently get a 4xx at runtime.
     _VISION_PROVIDER_MODELS = {
-        # OpenAI ordering matches the recommended GPT-5.4 family first, then
+        # OpenAI ordering puts the GPT-5.6 family first, then GPT-5.5/5.4,
         # GPT-5 and the GPT-4.1/4o backstops.
         "openai":    [
+            const.GPT_56_LUNA,
+            const.GPT_56_TERRA,
+            const.GPT_56_SOL,
             const.GPT_55,
             const.GPT_54,
             const.GPT_54_MINI,
diff --git a/common/const.py b/common/const.py
index 7580a9d6..20729c25 100644
--- a/common/const.py
+++ b/common/const.py
@@ -80,6 +80,9 @@ GPT_54 = "gpt-5.4"  # GPT-5.4 - Agent recommended model
 GPT_54_MINI = "gpt-5.4-mini"
 GPT_54_NANO = "gpt-5.4-nano"
 GPT_55 = "gpt-5.5"  # GPT-5.5 - top-tier (expensive), not default
+GPT_56_LUNA = "gpt-5.6-luna"    # GPT-5.6 Luna - default flagship model for GPT
+GPT_56_TERRA = "gpt-5.6-terra"  # GPT-5.6 Terra
+GPT_56_SOL = "gpt-5.6-sol"      # GPT-5.6 Sol - highest intelligence, higher latency
 O1 = "o1-preview"
 O1_MINI = "o1-mini"
 WHISPER_1 = "whisper-1"
@@ -214,6 +217,7 @@ MODEL_LIST = [
               GPT4_TURBO, GPT4_TURBO_PREVIEW, GPT4_TURBO_01_25, GPT4_TURBO_11_06, GPT4_TURBO_04_09,
               GPT_4o, GPT_4O_0806, GPT_4o_MINI,
               GPT_41, GPT_41_MINI, GPT_41_NANO,
+              GPT_56_LUNA, GPT_56_TERRA, GPT_56_SOL,
               GPT_5, GPT_5_MINI, GPT_5_NANO,
               GPT_54, GPT_55, GPT_54_MINI, GPT_54_NANO,
               O1, O1_MINI,
diff --git a/docs/ja/README.md b/docs/ja/README.md
index add6dc6c..c5a3e985 100644
--- a/docs/ja/README.md
+++ b/docs/ja/README.md
@@ -107,7 +107,7 @@ CowAgent は主要な LLM プロバイダーすべてに対応しています。
 | プロバイダー | 代表的なモデル | チャット | 画像認識 | 画像生成 | ASR | TTS | Embedding |
 | --- | --- | :-: | :-: | :-: | :-: | :-: | :-: |
 | [Claude](https://docs.cowagent.ai/ja/models/claude) | claude-sonnet-5 / fable-5 | ✅ | ✅ | | | | |
-| [OpenAI](https://docs.cowagent.ai/ja/models/openai) | gpt-5.5、o シリーズ | ✅ | ✅ | ✅ | ✅ | ✅ | ✅ |
+| [OpenAI](https://docs.cowagent.ai/ja/models/openai) | gpt-5.6 シリーズ | ✅ | ✅ | ✅ | ✅ | ✅ | ✅ |
 | [Gemini](https://docs.cowagent.ai/ja/models/gemini) | gemini-3.5-flash | ✅ | ✅ | ✅ | | | |
 | [DeepSeek](https://docs.cowagent.ai/ja/models/deepseek) | deepseek-v4-flash / pro | ✅ | | | | | |
 | [Qwen](https://docs.cowagent.ai/ja/models/qwen) | qwen3.7-plus | ✅ | ✅ | ✅ | ✅ | ✅ | ✅ |
diff --git a/docs/ja/models/index.mdx b/docs/ja/models/index.mdx
index c614dbb7..d7cc0633 100644
--- a/docs/ja/models/index.mdx
+++ b/docs/ja/models/index.mdx
@@ -22,7 +22,7 @@ CowAgent は国内外の主要ベンダーの大規模言語モデルをサポ
 | [MiniMax](/models/minimax) | MiniMax-M3 | ✅ | ✅ | ✅ | | ✅ | |
 | [Claude](/models/claude) | claude-sonnet-5 / fable-5 | ✅ | ✅ | | | | |
 | [Gemini](/models/gemini) | gemini-3.5-flash | ✅ | ✅ | ✅ | | | |
-| [OpenAI](/models/openai) | gpt-5.5、o シリーズ | ✅ | ✅ | ✅ | ✅ | ✅ | ✅ |
+| [OpenAI](/models/openai) | gpt-5.6 シリーズ | ✅ | ✅ | ✅ | ✅ | ✅ | ✅ |
 | [Zhipu GLM](/models/glm) | glm-5.2、glm-5v-turbo | ✅ | ✅ | | ✅ | | ✅ |
 | [Tongyi Qianwen](/models/qwen) | qwen3.7-plus | ✅ | ✅ | ✅ | ✅ | ✅ | ✅ |
 | [Doubao](/models/doubao) | doubao-seed-2.1 シリーズ | ✅ | ✅ | ✅ | | | ✅ |
diff --git a/docs/ja/models/openai.mdx b/docs/ja/models/openai.mdx
index 801c1fd3..063518a9 100644
--- a/docs/ja/models/openai.mdx
+++ b/docs/ja/models/openai.mdx
@@ -14,7 +14,7 @@ OpenAI は最も広範な機能をカバーするベンダーで、テキスト
 
 ```json
 {
-  "model": "gpt-5.5",
+  "model": "gpt-5.6-luna",
   "open_ai_api_key": "YOUR_API_KEY",
   "open_ai_api_base": "https://api.openai.com/v1"
 }
@@ -22,7 +22,7 @@ OpenAI は最も広範な機能をカバーするベンダーで、テキスト
 
 | パラメータ | 説明 |
 | --- | --- |
-| `model` | OpenAI API の [model パラメータ](https://platform.openai.com/docs/models) と同じです。`gpt-5.5`、`gpt-5.4`、`gpt-5.4-mini`、`gpt-5.4-nano`、`gpt-5` シリーズ、`gpt-4.1`、o シリーズなどをサポート。Agent モードのデフォルトは `gpt-5.5`、コストパフォーマンスを重視する場合は `gpt-5.4` に変更可能 |
+| `model` | OpenAI API の [model パラメータ](https://platform.openai.com/docs/models) と同じです。`gpt-5.6-luna`、`gpt-5.6-terra`、`gpt-5.6-sol`、`gpt-5.5`、`gpt-5.4`、`gpt-5.4-mini`、`gpt-5.4-nano`、`gpt-5` シリーズ、`gpt-4.1` などをサポート。Agent モードのデフォルトは `gpt-5.6-luna`、コストパフォーマンスを重視する場合は `gpt-5.4` に変更可能 |
 | `open_ai_api_key` | [OpenAI プラットフォーム](https://platform.openai.com/api-keys) で作成 |
 | `open_ai_api_base` | 任意。サードパーティのプロキシに接続するために変更可能 |
 | `bot_type` | OpenAI 公式モデルを使用する場合は不要。互換プロトコルでベンダーモデルに接続する場合は `openai` に設定 |
diff --git a/docs/models/index.mdx b/docs/models/index.mdx
index 2a7afff5..e056aac3 100644
--- a/docs/models/index.mdx
+++ b/docs/models/index.mdx
@@ -15,7 +15,7 @@ A snapshot of each provider's capabilities. "Text" refers to the main chat model
 | [MiniMax](/models/minimax) | MiniMax-M3 | ✅ | ✅ | ✅ | | ✅ | |
 | [Claude](/models/claude) | claude-sonnet-5 / fable-5 | ✅ | ✅ | | | | |
 | [Gemini](/models/gemini) | gemini-3.5-flash | ✅ | ✅ | ✅ | | | |
-| [OpenAI](/models/openai) | gpt-5.5, o-series | ✅ | ✅ | ✅ | ✅ | ✅ | ✅ |
+| [OpenAI](/models/openai) | gpt-5.6 series | ✅ | ✅ | ✅ | ✅ | ✅ | ✅ |
 | [GLM](/models/glm) | glm-5.2, glm-5v-turbo | ✅ | ✅ | | ✅ | | ✅ |
 | [Qwen](/models/qwen) | qwen3.7-plus | ✅ | ✅ | ✅ | ✅ | ✅ | ✅ |
 | [Doubao](/models/doubao) | doubao-seed-2.1 series | ✅ | ✅ | ✅ | | | ✅ |
diff --git a/docs/models/openai.mdx b/docs/models/openai.mdx
index 7d428d95..02c08191 100644
--- a/docs/models/openai.mdx
+++ b/docs/models/openai.mdx
@@ -14,7 +14,7 @@ OpenAI offers the most complete coverage and can simultaneously serve text chat,
 
 ```json
 {
-  "model": "gpt-5.5",
+  "model": "gpt-5.6-luna",
   "open_ai_api_key": "YOUR_API_KEY",
   "open_ai_api_base": "https://api.openai.com/v1"
 }
@@ -22,7 +22,7 @@ OpenAI offers the most complete coverage and can simultaneously serve text chat,
 
 | Parameter | Description |
 | --- | --- |
-| `model` | Same as OpenAI's [model parameter](https://platform.openai.com/docs/models); supports `gpt-5.5`, `gpt-5.4`, `gpt-5.4-mini`, `gpt-5.4-nano`, the `gpt-5` series, `gpt-4.1`, the o-series, etc. Agent mode defaults to `gpt-5.5`; use `gpt-5.4` for better cost-efficiency |
+| `model` | Same as OpenAI's [model parameter](https://platform.openai.com/docs/models); supports `gpt-5.6-luna`, `gpt-5.6-terra`, `gpt-5.6-sol`, `gpt-5.5`, `gpt-5.4`, `gpt-5.4-mini`, `gpt-5.4-nano`, the `gpt-5` series, `gpt-4.1`, etc. Agent mode defaults to `gpt-5.6-luna`; use `gpt-5.4` for better cost-efficiency |
 | `open_ai_api_key` | Create one on the [OpenAI Platform](https://platform.openai.com/api-keys) |
 | `open_ai_api_base` | Optional; change it to access a third-party proxy |
 | `bot_type` | Not required when using OpenAI's official models; set to `openai` when accessing other providers via the compatible protocol |
diff --git a/docs/zh/README-Hant.md b/docs/zh/README-Hant.md
index bcf0bbf7..3394d393 100644
--- a/docs/zh/README-Hant.md
+++ b/docs/zh/README-Hant.md
@@ -110,7 +110,7 @@ CowAgent 支援國內外主流廠商的大語言模型。**文字對話、影像
 | [MiniMax](https://docs.cowagent.ai/zh/models/minimax) | MiniMax-M3 | ✅ | ✅ | ✅ | | ✅ | |
 | [Claude](https://docs.cowagent.ai/zh/models/claude) | claude-sonnet-5 / fable-5 | ✅ | ✅ | | | | |
 | [Gemini](https://docs.cowagent.ai/zh/models/gemini) | gemini-3.5-flash | ✅ | ✅ | ✅ | | | |
-| [OpenAI](https://docs.cowagent.ai/zh/models/openai) | gpt-5.5、o 系列 | ✅ | ✅ | ✅ | ✅ | ✅ | ✅ |
+| [OpenAI](https://docs.cowagent.ai/zh/models/openai) | gpt-5.6 系列 | ✅ | ✅ | ✅ | ✅ | ✅ | ✅ |
 | [智譜 GLM](https://docs.cowagent.ai/zh/models/glm) | glm-5.2、glm-5v-turbo | ✅ | ✅ | | ✅ | | ✅ |
 | [通義千問](https://docs.cowagent.ai/zh/models/qwen) | qwen3.7-plus | ✅ | ✅ | ✅ | ✅ | ✅ | ✅ |
 | [豆包 Doubao](https://docs.cowagent.ai/zh/models/doubao) | doubao-seed-2.1 系列 | ✅ | ✅ | ✅ | | | ✅ |
diff --git a/docs/zh/README.md b/docs/zh/README.md
index a1c5b9cc..2fcedbd8 100644
--- a/docs/zh/README.md
+++ b/docs/zh/README.md
@@ -110,7 +110,7 @@ CowAgent 支持国内外主流厂商的大语言模型。**文本对话、图像
 | [MiniMax](https://docs.cowagent.ai/zh/models/minimax) | MiniMax-M3 | ✅ | ✅ | ✅ | | ✅ | |
 | [Claude](https://docs.cowagent.ai/zh/models/claude) | claude-sonnet-5 / fable-5 | ✅ | ✅ | | | | |
 | [Gemini](https://docs.cowagent.ai/zh/models/gemini) | gemini-3.5-flash | ✅ | ✅ | ✅ | | | |
-| [OpenAI](https://docs.cowagent.ai/zh/models/openai) | gpt-5.5、o 系列 | ✅ | ✅ | ✅ | ✅ | ✅ | ✅ |
+| [OpenAI](https://docs.cowagent.ai/zh/models/openai) | gpt-5.6 系列 | ✅ | ✅ | ✅ | ✅ | ✅ | ✅ |
 | [智谱 GLM](https://docs.cowagent.ai/zh/models/glm) | glm-5.2、glm-5v-turbo | ✅ | ✅ | | ✅ | | ✅ |
 | [通义千问](https://docs.cowagent.ai/zh/models/qwen) | qwen3.7-plus | ✅ | ✅ | ✅ | ✅ | ✅ | ✅ |
 | [豆包 Doubao](https://docs.cowagent.ai/zh/models/doubao) | doubao-seed-2.1 系列 | ✅ | ✅ | ✅ | | | ✅ |
diff --git a/docs/zh/models/index.mdx b/docs/zh/models/index.mdx
index 386b7269..3098e57a 100644
--- a/docs/zh/models/index.mdx
+++ b/docs/zh/models/index.mdx
@@ -16,7 +16,7 @@ CowAgent 支持国内外主流厂商的大语言模型，模型接口实现在
 | [MiniMax](/zh/models/minimax) | MiniMax-M3 | ✅ | ✅ | ✅ | | ✅ | |
 | [Claude](/zh/models/claude) | claude-sonnet-5 / fable-5 | ✅ | ✅ | | | | |
 | [Gemini](/zh/models/gemini) | gemini-3.5-flash | ✅ | ✅ | ✅ | | | |
-| [OpenAI](/zh/models/openai) | gpt-5.5、o 系列 | ✅ | ✅ | ✅ | ✅ | ✅ | ✅ |
+| [OpenAI](/zh/models/openai) | gpt-5.6 系列 | ✅ | ✅ | ✅ | ✅ | ✅ | ✅ |
 | [智谱 GLM](/zh/models/glm) | glm-5.2、glm-5v-turbo | ✅ | ✅ | | ✅ | | ✅ |
 | [通义千问](/zh/models/qwen) | qwen3.7-plus | ✅ | ✅ | ✅ | ✅ | ✅ | ✅ |
 | [豆包 Doubao](/zh/models/doubao) | doubao-seed-2.1 系列 | ✅ | ✅ | ✅ | | | ✅ |
diff --git a/docs/zh/models/openai.mdx b/docs/zh/models/openai.mdx
index aad83c8f..2d5e9d5a 100644
--- a/docs/zh/models/openai.mdx
+++ b/docs/zh/models/openai.mdx
@@ -14,7 +14,7 @@ OpenAI 是覆盖最完整的厂商，可同时承担文本对话、视觉理解
 
 ```json
 {
-  "model": "gpt-5.5",
+  "model": "gpt-5.6-luna",
   "open_ai_api_key": "YOUR_API_KEY",
   "open_ai_api_base": "https://api.openai.com/v1"
 }
@@ -22,7 +22,7 @@ OpenAI 是覆盖最完整的厂商，可同时承担文本对话、视觉理解
 
 | 参数 | 说明 |
 | --- | --- |
-| `model` | 与 OpenAI 接口的 [model 参数](https://platform.openai.com/docs/models) 一致，支持 `gpt-5.5`、`gpt-5.4`、`gpt-5.4-mini`、`gpt-5.4-nano`、`gpt-5` 系列、`gpt-4.1`、o 系列等；Agent 模式默认 `gpt-5.5`，追求性价比可改为 `gpt-5.4` |
+| `model` | 与 OpenAI 接口的 [model 参数](https://platform.openai.com/docs/models) 一致，支持 `gpt-5.6-luna`、`gpt-5.6-terra`、`gpt-5.6-sol`、`gpt-5.5`、`gpt-5.4`、`gpt-5.4-mini`、`gpt-5.4-nano`、`gpt-5` 系列、`gpt-4.1` 等；Agent 模式默认 `gpt-5.6-luna`，追求性价比可改为 `gpt-5.4` |
 | `open_ai_api_key` | 在 [OpenAI 平台](https://platform.openai.com/api-keys) 创建 |
 | `open_ai_api_base` | 可选，修改可接入第三方代理 |
 | `bot_type` | 使用 OpenAI 官方模型时无需填写；通过兼容协议接入厂商模型时需设为 `openai` |
diff --git a/models/openai_compatible_bot.py b/models/openai_compatible_bot.py
index d89690a0..813c7216 100644
--- a/models/openai_compatible_bot.py
+++ b/models/openai_compatible_bot.py
@@ -29,6 +29,24 @@ class OpenAICompatibleBot:
     Subclasses only need to override get_api_config() to provide their specific API settings.
     """
     
+    @staticmethod
+    def _is_gpt5_reasoning_model(model_name: str) -> bool:
+        """Whether the model is a GPT-5.x / o-series reasoning model.
+
+        Covers gpt-5, gpt-5.4/5.5/5.6 (including suffixed variants like
+        gpt-5.6-sol / gpt-5.6-luna) and the o1/o3/o4 families. These models
+        only accept default sampling params and, on /v1/chat/completions,
+        reject reasoning_effort together with function tools.
+        """
+        if not model_name or not isinstance(model_name, str):
+            return False
+        name = model_name.lower()
+        if name.startswith("gpt-5"):
+            return True
+        if name.startswith(("o1", "o3", "o4")):
+            return True
+        return False
+
     def get_api_config(self):
         """
         Get API configuration for this bot.
@@ -99,8 +117,10 @@ class OpenAICompatibleBot:
                 "presence_penalty": kwargs.get("presence_penalty", api_config.get('default_presence_penalty', 0.0)),
                 "stream": stream
             }
-            # GPT-5 / GPT-5.5 / o1 series only accept default temperature/top_p and reject penalty params
-            if model_name in ("gpt-5", "gpt-5-mini", "gpt-5-nano", "gpt-5.5", "o1", "o1-mini"):
+            # GPT-5.x / o-series reasoning models only accept default
+            # temperature/top_p and reject penalty params.
+            is_gpt5_reasoning = self._is_gpt5_reasoning_model(model_name)
+            if is_gpt5_reasoning:
                 for key in ("temperature", "top_p", "frequency_penalty", "presence_penalty"):
                     request_params.pop(key, None)
             
@@ -112,6 +132,12 @@ class OpenAICompatibleBot:
             if tools:
                 request_params["tools"] = tools
                 request_params["tool_choice"] = kwargs.get("tool_choice", "auto")
+                # GPT-5.x reasoning models reject function tools combined with
+                # reasoning_effort on /v1/chat/completions unless it is "none".
+                # Force "none" so agent tool calling works without migrating to
+                # the Responses API.
+                if is_gpt5_reasoning:
+                    request_params["reasoning_effort"] = "none"
             
             # Make API call with proper configuration
             api_key = api_config.get('api_key')
diff --git a/run.sh b/run.sh
index 08167015..266e0cd9 100755
--- a/run.sh
+++ b/run.sh
@@ -599,7 +599,7 @@ select_model() {
         "DeepSeek (deepseek-v4-flash, deepseek-v4-pro, etc.)" \
         "Claude (claude-opus-4-8, claude-fable-5, etc.)" \
         "Gemini (gemini-3.5-flash, gemini-3.1-pro-preview, etc.)" \
-        "OpenAI (gpt-5.5, etc.)" \
+        "OpenAI (gpt-5.6-luna, etc.)" \
         "MiniMax (MiniMax-M3, etc.)" \
         "GLM (glm-5.2, etc.)" \
         "Qwen (qwen3.7-plus, qwen3.7-max, etc.)" \
@@ -631,7 +631,7 @@ configure_model() {
         1) read_model_config "DeepSeek" "deepseek-v4-flash" "DEEPSEEK_KEY" ;;
         2) read_model_config "Claude" "claude-opus-4-8" "CLAUDE_KEY" ;;
         3) read_model_config "Gemini" "gemini-3.1-pro-preview" "GEMINI_KEY" ;;
-        4) read_model_config "OpenAI" "gpt-5.5" "OPENAI_KEY" ;;
+        4) read_model_config "OpenAI" "gpt-5.6-luna" "OPENAI_KEY" ;;
         5) read_model_config "MiniMax" "MiniMax-M3" "MINIMAX_KEY" ;;
         6) read_model_config "GLM" "glm-5.2" "ZHIPU_KEY" ;;
         7) read_model_config "Qwen (DashScope)" "qwen3.7-plus" "DASHSCOPE_KEY" ;;
diff --git a/scripts/run.ps1 b/scripts/run.ps1
index 2124710a..7a87ddc6 100644
--- a/scripts/run.ps1
+++ b/scripts/run.ps1
@@ -456,7 +456,7 @@ $ModelChoices = @{
     1  = @{ Provider = "DeepSeek";                Default = "deepseek-v4-flash";                   Field = "deepseek_api_key" }
     2  = @{ Provider = "Claude";                  Default = "claude-opus-4-8";                     Field = "claude_api_key";    BaseField = "claude_api_base" }
     3  = @{ Provider = "Gemini";                  Default = "gemini-3.1-pro-preview";              Field = "gemini_api_key";    BaseField = "gemini_api_base" }
-    4  = @{ Provider = "OpenAI";                  Default = "gpt-5.5";                             Field = "open_ai_api_key";   BaseField = "open_ai_api_base" }
+    4  = @{ Provider = "OpenAI";                  Default = "gpt-5.6-luna";                        Field = "open_ai_api_key";   BaseField = "open_ai_api_base" }
     5  = @{ Provider = "MiniMax";                 Default = "MiniMax-M3";                          Field = "minimax_api_key" }
     6  = @{ Provider = "GLM";                     Default = "glm-5.2";                             Field = "zhipu_ai_api_key" }
     7  = @{ Provider = "Qwen (DashScope)";        Default = "qwen3.7-plus";                        Field = "dashscope_api_key" }
@@ -473,7 +473,7 @@ function Select-Model {
         "DeepSeek (deepseek-v4-flash, deepseek-v4-pro, etc.)",
         "Claude (claude-opus-4-8, claude-fable-5, etc.)",
         "Gemini (gemini-3.5-flash, gemini-3.1-pro-preview, etc.)",
-        "OpenAI (gpt-5.5, etc.)",
+        "OpenAI (gpt-5.6-luna, etc.)",
         "MiniMax (MiniMax-M3, etc.)",
         "GLM (glm-5.2, etc.)",
         "Qwen (qwen3.7-plus, qwen3.7-max, etc.)",