diff --git a/nonebot_plugin_marshoai/marsho.py b/nonebot_plugin_marshoai/marsho.py
index b127aec..d12e0cf 100644
--- a/nonebot_plugin_marshoai/marsho.py
+++ b/nonebot_plugin_marshoai/marsho.py
@@ -449,7 +449,11 @@ with contextlib.suppress(ImportError):  # 优化先不做（）
                     client=client,
                     model_name=model_name,
                     msg=[
-                        get_prompt(),
+                        (
+                            get_prompt()
+                            if model_name.lower() not in NO_SYSPROMPT_MODELS
+                            else None
+                        ),
                         UserMessage(
                             content=f"*{user_nickname}{config.marshoai_poke_suffix}"
                         ),
diff --git a/nonebot_plugin_marshoai/util.py b/nonebot_plugin_marshoai/util.py
index a4a04d4..904c9ee 100755
--- a/nonebot_plugin_marshoai/util.py
+++ b/nonebot_plugin_marshoai/util.py
@@ -14,7 +14,7 @@ from nonebot.log import logger
 from nonebot_plugin_alconna import Image as ImageMsg
 from nonebot_plugin_alconna import Text as TextMsg
 from nonebot_plugin_alconna import UniMessage
-from openai import AsyncOpenAI
+from openai import AsyncOpenAI, NotGiven
 from zhDateTime import DateTime
 
 from .config import config
@@ -25,6 +25,8 @@ nickname_json = None  # 记录昵称
 praises_json = None  # 记录夸赞名单
 loaded_target_list = []  # 记录已恢复备份的上下文的列表
 
+NOT_GIVEN = NotGiven()
+
 # 时间参数相关
 if config.marshoai_enable_time_prompt:
     _weekdays = ["星期一", "星期二", "星期三", "星期四", "星期五", "星期六", "星期日"]
@@ -141,13 +143,13 @@ async def make_chat_openai(
         model_name: 指定AI模型名
         tools: 工具列表
     """
-    return await client.chat.completions.create(
+    return await client.chat.completions.create(  # type: ignore
         messages=msg,
         model=model_name,
-        tools=tools,
-        temperature=config.marshoai_temperature,
-        max_tokens=config.marshoai_max_tokens,
-        top_p=config.marshoai_top_p,
+        tools=tools or NOT_GIVEN,
+        temperature=config.marshoai_temperature or NOT_GIVEN,
+        max_tokens=config.marshoai_max_tokens or NOT_GIVEN,
+        top_p=config.marshoai_top_p or NOT_GIVEN,
         timeout=config.marshoai_timeout,
     )