diff --git a/ui/ModelModal/src/ModelModal.tsx b/ui/ModelModal/src/ModelModal.tsx
index 65d8296..0d5d1c7 100644
--- a/ui/ModelModal/src/ModelModal.tsx
+++ b/ui/ModelModal/src/ModelModal.tsx
@@ -31,7 +31,7 @@ import { getLocaleMessage } from './constants/locale';
 import './assets/fonts/iconfont';
 import { lightTheme } from './theme';
 import { isValidURL } from './utils';
-import { getModelGroup, getModelLogo } from './utils/model';
+import { getModelGroup, getModelLogo, shouldDisableTemperatureForModel } from './utils/model';
 import Fuse from 'fuse.js';
 
 const titleMap: Record<string, string> = {
@@ -108,6 +108,9 @@ export const ModelModal: React.FC<ModelModalProps> = ({
 
   const providerBrand = watch('provider');
   const baseUrl = watch('base_url');
+  const modelName = watch('model_name');
+  const temperature = watch('temperature');
+  const isTemperatureDisabled = shouldDisableTemperatureForModel(modelName || '');
 
   // 判断是否需要显示手动输入模型名称（无法自动获取模型列表的情况）
   const shouldShowManualModelInput = () => {
@@ -521,6 +524,12 @@ export const ModelModal: React.FC<ModelModalProps> = ({
     // eslint-disable-next-line react-hooks/exhaustive-deps
   }, [data, open]);
 
+  useEffect(() => {
+    if (isTemperatureDisabled && temperature !== null) {
+      setValue('temperature', null);
+    }
+  }, [isTemperatureDisabled, setValue, temperature]);
+
   return (
     <ThemeProvider theme={lightTheme}>
       <Modal
@@ -1510,6 +1519,7 @@ export const ModelModal: React.FC<ModelModalProps> = ({
                               render={({ field }) => (
                                 <TextField
                                   value={field.value ?? ''}
+                                  disabled={isTemperatureDisabled}
                                   size='small'
                                   type='number'
                                   inputProps={{
@@ -1543,6 +1553,7 @@ export const ModelModal: React.FC<ModelModalProps> = ({
                             render={({ field }) => (
                               <Slider
                                 value={field.value ?? 0}
+                                disabled={isTemperatureDisabled}
                                 onChange={(_, val) =>
                                   field.onChange(val as number)
                                 }
@@ -1558,6 +1569,19 @@ export const ModelModal: React.FC<ModelModalProps> = ({
                               />
                             )}
                           />
+                          {isTemperatureDisabled && (
+                            <Box
+                              sx={{
+                                mt: 1,
+                                ml: 2,
+                                fontSize: 12,
+                                lineHeight: '18px',
+                                color: 'text.secondary',
+                              }}
+                            >
+                              当前模型不支持自定义 temperature，将忽略该参数。
+                            </Box>
+                          )}
                         </Box>
                       </Stack>
                     </AccordionDetails>
diff --git a/ui/ModelModal/src/utils/model.ts b/ui/ModelModal/src/utils/model.ts
index e47c94b..c6b99b9 100644
--- a/ui/ModelModal/src/utils/model.ts
+++ b/ui/ModelModal/src/utils/model.ts
@@ -99,6 +99,20 @@ export function isCodeModel(model_id: string, provider: string): boolean {
   return /(?:^o3$|.*(code|claude\s+sonnet|claude\s+opus|gpt-4\.1|gpt-4o|gpt-5|gemini[\s-]+2\.5|o4-mini|kimi-k2).*)/i.test(modelId) || false
 }
 
+export function shouldDisableTemperatureForModel(model_id: string): boolean {
+  if (!model_id) {
+    return false
+  }
+
+  const modelId = getLowerBaseModelName(model_id, '/')
+  return (
+    modelId.startsWith('o1') ||
+    modelId.startsWith('o3') ||
+    modelId.startsWith('o4') ||
+    modelId.startsWith('gpt-5')
+  )
+}
+
 export function isReasoningModel(model_id: string, provider: string): boolean {
   if (!model_id || isEmbeddingModel(model_id, provider) || isRerankModel(model_id)) {
     return false
diff --git a/usecase/helper.go b/usecase/helper.go
index 121c480..e7e2edc 100644
--- a/usecase/helper.go
+++ b/usecase/helper.go
@@ -730,10 +730,12 @@ func buildOpenAIChatConfig(md *domain.ModelMetadata) *openai.ChatModelConfig {
 		t = *md.Temperature
 	}
 	cfg := &openai.ChatModelConfig{
-		APIKey:      md.APIKey,
-		BaseURL:     md.BaseURL,
-		Model:       string(md.ModelName),
-		Temperature: &t,
+		APIKey:  md.APIKey,
+		BaseURL: md.BaseURL,
+		Model:   string(md.ModelName),
+	}
+	if !shouldIgnoreOpenAITemperature(md.ModelName) {
+		cfg.Temperature = &t
 	}
 	if md.MaxTokens != nil {
 		cfg.MaxTokens = md.MaxTokens
@@ -778,6 +780,13 @@ func buildOpenAIChatConfig(md *domain.ModelMetadata) *openai.ChatModelConfig {
 	return cfg
 }
 
+func shouldIgnoreOpenAITemperature(model string) bool {
+	return strings.HasPrefix(model, "o1") ||
+		strings.HasPrefix(model, "o3") ||
+		strings.HasPrefix(model, "o4") ||
+		strings.HasPrefix(model, "gpt-5")
+}
+
 func newDeepseekChatModel(ctx context.Context, md *domain.ModelMetadata) (model.BaseChatModel, error) {
 	t := float32(0.0)
 	if md.Temperature != nil {
diff --git a/usecase/helper_test.go b/usecase/helper_test.go
index ac7709e..9650e62 100644
--- a/usecase/helper_test.go
+++ b/usecase/helper_test.go
@@ -37,6 +37,46 @@ func TestBuildOpenAIChatConfig_Azure(t *testing.T) {
 	}
 }
 
+func TestBuildOpenAIChatConfig_IgnoreTemperatureForReasoningModels(t *testing.T) {
+	temp := float32(1.0)
+	testCases := []struct {
+		name      string
+		modelName string
+		ignored   bool
+	}{
+		{name: "o1", modelName: "o1-preview", ignored: true},
+		{name: "o3", modelName: "o3-mini", ignored: true},
+		{name: "o4", modelName: "o4-mini", ignored: true},
+		{name: "gpt-5", modelName: "gpt-5-mini", ignored: true},
+		{name: "regular model", modelName: "gpt-4.1-mini", ignored: false},
+	}
+
+	for _, tc := range testCases {
+		t.Run(tc.name, func(t *testing.T) {
+			md := &domain.ModelMetadata{
+				ModelName:   tc.modelName,
+				Temperature: &temp,
+			}
+
+			cfg := buildOpenAIChatConfig(md)
+
+			if tc.ignored {
+				if cfg.Temperature != nil {
+					t.Fatalf("expected temperature to be ignored for model %q, got %v", tc.modelName, *cfg.Temperature)
+				}
+				return
+			}
+
+			if cfg.Temperature == nil {
+				t.Fatalf("expected temperature to be preserved for model %q", tc.modelName)
+			}
+			if *cfg.Temperature != temp {
+				t.Fatalf("expected temperature %v for model %q, got %v", temp, tc.modelName, *cfg.Temperature)
+			}
+		})
+	}
+}
+
 func TestCheckModel_TemperaturePassed(t *testing.T) {
 	testName := "TestCheckModel_TemperaturePassed_Provider=Moonshot_Model=kimi-k2.5_Temp=1"
 	// 1. Setup a test server to intercept the request