diff --git a/backend/internal/config/config.go b/backend/internal/config/config.go
index 0819ac5e33..f5853682ac 100644
--- a/backend/internal/config/config.go
+++ b/backend/internal/config/config.go
@@ -1667,9 +1667,8 @@ type DefaultConfig struct {
 }
 
 type RateLimitConfig struct {
-	OverloadCooldownMinutes  int `mapstructure:"overload_cooldown_minutes"`   // 529过载冷却时间(分钟)
-	OAuth401CooldownMinutes  int `mapstructure:"oauth_401_cooldown_minutes"`  // OAuth 401临时不可调度冷却(分钟)
-	Gemini429CooldownMinutes int `mapstructure:"gemini_429_cooldown_minutes"` // Gemini 429 冷却时间(分钟)
+	OverloadCooldownMinutes int `mapstructure:"overload_cooldown_minutes"`  // 529过载冷却时间(分钟)
+	OAuth401CooldownMinutes int `mapstructure:"oauth_401_cooldown_minutes"` // OAuth 401临时不可调度冷却(分钟)
 }
 
 // APIKeyAuthCacheConfig API Key 认证缓存配置
@@ -2361,7 +2360,7 @@ func setDefaults() {
 
 	// Gateway
 	viper.SetDefault("gateway.response_header_timeout", 600) // 600秒(10分钟)等待上游响应头，LLM高负载时可能排队较久
-	viper.SetDefault("gateway.openai_response_header_timeout", 120)
+	viper.SetDefault("gateway.openai_response_header_timeout", 0)
 	viper.SetDefault("gateway.grok_response_header_timeout", 120)
 	viper.SetDefault("gateway.openai_first_output_timeout_seconds", 0)
 	viper.SetDefault("gateway.openai_high_effort_first_output_timeout_seconds", 0)
@@ -2480,7 +2479,7 @@ func setDefaults() {
 	viper.SetDefault("gateway.max_upstream_clients", 5000)
 	viper.SetDefault("gateway.client_idle_ttl_seconds", 900)
 	viper.SetDefault("gateway.concurrency_slot_ttl_minutes", 30) // 并发槽位过期时间（支持超长请求）
-	viper.SetDefault("gateway.stream_data_interval_timeout", 120)
+	viper.SetDefault("gateway.stream_data_interval_timeout", 180)
 	viper.SetDefault("gateway.stream_keepalive_interval", 10)
 	viper.SetDefault("gateway.image_stream_data_interval_timeout", 900)
 	viper.SetDefault("gateway.image_stream_keepalive_interval", 10)