diff --git a/src/renderer/src/pages/settings/AssistantSettings/AssistantModelSettings.tsx b/src/renderer/src/pages/settings/AssistantSettings/AssistantModelSettings.tsx
index e69f322513..a2efdf387d 100644
--- a/src/renderer/src/pages/settings/AssistantSettings/AssistantModelSettings.tsx
+++ b/src/renderer/src/pages/settings/AssistantSettings/AssistantModelSettings.tsx
@@ -33,7 +33,7 @@ const AssistantModelSettings: FC<Props> = ({ assistant, updateAssistant, updateA
   const [toolUseMode, setToolUseMode] = useState(assistant?.settings?.toolUseMode ?? 'prompt')
   const [defaultModel, setDefaultModel] = useState(assistant?.defaultModel)
   const [topP, setTopP] = useState(assistant?.settings?.topP ?? 1)
-  const [enableTopP, setEnableTopP] = useState(assistant?.settings?.enableTopP ?? true)
+  const [enableTopP, setEnableTopP] = useState(assistant?.settings?.enableTopP ?? false)
   const [customParameters, setCustomParameters] = useState<AssistantSettingCustomParameters[]>(
     assistant?.settings?.customParameters ?? []
   )
@@ -164,7 +164,7 @@ const AssistantModelSettings: FC<Props> = ({ assistant, updateAssistant, updateA
     setMaxTokens(0)
     setStreamOutput(true)
     setTopP(1)
-    setEnableTopP(true)
+    setEnableTopP(false)
     setCustomParameters([])
     setToolUseMode('prompt')
     updateAssistantSettings({
@@ -175,7 +175,7 @@ const AssistantModelSettings: FC<Props> = ({ assistant, updateAssistant, updateA
       maxTokens: 0,
       streamOutput: true,
       topP: 1,
-      enableTopP: true,
+      enableTopP: false,
       customParameters: [],
       toolUseMode: 'prompt'
     })
diff --git a/src/renderer/src/pages/settings/ModelSettings/DefaultAssistantSettings.tsx b/src/renderer/src/pages/settings/ModelSettings/DefaultAssistantSettings.tsx
index b059174644..0963274162 100644
--- a/src/renderer/src/pages/settings/ModelSettings/DefaultAssistantSettings.tsx
+++ b/src/renderer/src/pages/settings/ModelSettings/DefaultAssistantSettings.tsx
@@ -24,7 +24,7 @@ const AssistantSettings: FC = () => {
   const [enableMaxTokens, setEnableMaxTokens] = useState(defaultAssistant?.settings?.enableMaxTokens ?? false)
   const [maxTokens, setMaxTokens] = useState(defaultAssistant?.settings?.maxTokens ?? 0)
   const [topP, setTopP] = useState(defaultAssistant.settings?.topP ?? 1)
-  const [enableTopP, setEnableTopP] = useState(defaultAssistant.settings?.enableTopP ?? true)
+  const [enableTopP, setEnableTopP] = useState(defaultAssistant.settings?.enableTopP ?? false)
   const [emoji, setEmoji] = useState(defaultAssistant.emoji || getLeadingEmoji(defaultAssistant.name) || '')
   const [name, setName] = useState(
     defaultAssistant.name.replace(getLeadingEmoji(defaultAssistant.name) || '', '').trim()
@@ -71,7 +71,7 @@ const AssistantSettings: FC = () => {
     setEnableMaxTokens(false)
     setMaxTokens(0)
     setTopP(1)
-    setEnableTopP(true)
+    setEnableTopP(false)
     updateDefaultAssistant({
       ...defaultAssistant,
       settings: {
@@ -83,7 +83,7 @@ const AssistantSettings: FC = () => {
         maxTokens: DEFAULT_MAX_TOKENS,
         streamOutput: true,
         topP: 1,
-        enableTopP: true
+        enableTopP: false
       }
     })
   }
diff --git a/src/renderer/src/services/AssistantService.ts b/src/renderer/src/services/AssistantService.ts
index 2b083f48b9..2bfcde9c78 100644
--- a/src/renderer/src/services/AssistantService.ts
+++ b/src/renderer/src/services/AssistantService.ts
@@ -35,7 +35,7 @@ export const DEFAULT_ASSISTANT_SETTINGS: AssistantSettings = {
   maxTokens: 0,
   streamOutput: true,
   topP: 1,
-  enableTopP: true,
+  enableTopP: false,
   toolUseMode: 'prompt',
   customParameters: []
 }
@@ -169,7 +169,7 @@ export const getAssistantSettings = (assistant: Assistant): AssistantSettings =>
     temperature: assistant?.settings?.temperature ?? DEFAULT_TEMPERATURE,
     enableTemperature: assistant?.settings?.enableTemperature ?? true,
     topP: assistant?.settings?.topP ?? 1,
-    enableTopP: assistant?.settings?.enableTopP ?? true,
+    enableTopP: assistant?.settings?.enableTopP ?? false,
     enableMaxTokens: assistant?.settings?.enableMaxTokens ?? false,
     maxTokens: getAssistantMaxTokens(),
     streamOutput: assistant?.settings?.streamOutput ?? true,