diff --git a/maubot_llmplus/aibot.py b/maubot_llmplus/aibot.py
index 39b3b56..1737f5c 100644
--- a/maubot_llmplus/aibot.py
+++ b/maubot_llmplus/aibot.py
@@ -28,7 +28,8 @@ class Config(BaseProxyConfig):
         helper.copy("system_prompt")
         helper.copy("platforms")
         helper.copy("additional_prompt")
-        super._cur_model = self['platforms'][str(self['use_platform'])]['model']
+
+        super._cur_model = helper.base['platforms'][helper.base['use_platform']]['model']
 
 
 class AiBotPlugin(AbsExtraConfigPlugin):
diff --git a/maubot_llmplus/platforms.py b/maubot_llmplus/platforms.py
index e444378..09d3217 100644
--- a/maubot_llmplus/platforms.py
+++ b/maubot_llmplus/platforms.py
@@ -8,6 +8,7 @@ from maubot import Plugin
 from mautrix.types import MessageEvent, EncryptedEvent
 from mautrix.util.config import BaseProxyConfig
 
+from maubot_llmplus.aibot import Config
 from maubot_llmplus.plugin import AbsExtraConfigPlugin
 
 """
@@ -36,7 +37,7 @@ class Platform:
     system_prompt: str
     max_context_messages: int
 
-    def __init__(self, config: BaseProxyConfig, http: ClientSession) -> None:
+    def __init__(self, config: Config, http: ClientSession) -> None:
         self.http = http
         self.config = config['platforms'][self.get_type()]
         self.url = self.config['url']