diff --git a/backend/internal/config/config.go b/backend/internal/config/config.go
index 13da0ddac1..0ed2b17213 100644
--- a/backend/internal/config/config.go
+++ b/backend/internal/config/config.go
@@ -1036,10 +1036,12 @@ type GatewayConfig struct {
 //   - free_quota_token_limit: nominal rolling-window token allowance.
 //   - free_quota_soft_gate_percent: stop new scheduling before the nominal limit (1-100).
 //   - free_quota_window_hours: local usage rolling window length in hours.
-//   - free_quota_stats_cache_seconds: bound hot-path aggregate query frequency (0 disables cache).
+//   - free_quota_stats_cache_seconds: cache TTL for free-tier usage stats
+//     (hot path never blocks on DB; misses fail open and refresh in background).
 type GatewayGrokConfig struct {
 	// PasswordAuthEnabled controls the optional password-to-SSO OAuth flow.
 	// It defaults to false and must be explicitly enabled by the operator.
+	// When true, POST /admin/grok/oauth/password is functional (not ignored).
 	PasswordAuthEnabled bool `mapstructure:"password_auth_enabled"`
 	// FreeQuotaSoftGateEnabled enables a local rolling-window scheduling guard
 	// for explicitly free Grok OAuth accounts only.
@@ -1050,7 +1052,8 @@ type GatewayGrokConfig struct {
 	FreeQuotaSoftGatePercent int `mapstructure:"free_quota_soft_gate_percent"`
 	// FreeQuotaWindowHours controls the local rolling usage window.
 	FreeQuotaWindowHours int `mapstructure:"free_quota_window_hours"`
-	// FreeQuotaStatsCacheSeconds bounds hot-path aggregate query frequency.
+	// FreeQuotaStatsCacheSeconds is the soft-gate stats cache TTL. Hot path never
+	// waits on usage_logs; misses fail open and refresh asynchronously.
 	FreeQuotaStatsCacheSeconds int `mapstructure:"free_quota_stats_cache_seconds"`
 }
 
@@ -2347,7 +2350,7 @@ func setDefaults() {
 	viper.SetDefault("gateway.grok.free_quota_token_limit", int64(500_000))
 	viper.SetDefault("gateway.grok.free_quota_soft_gate_percent", 95)
 	viper.SetDefault("gateway.grok.free_quota_window_hours", 24)
-	viper.SetDefault("gateway.grok.free_quota_stats_cache_seconds", 5)
+	viper.SetDefault("gateway.grok.free_quota_stats_cache_seconds", 60)
 	viper.SetDefault("gateway.image_concurrency.enabled", false)
 	viper.SetDefault("gateway.image_concurrency.max_concurrent_requests", 0)
 	viper.SetDefault("gateway.image_concurrency.overflow_mode", ImageConcurrencyOverflowModeReject)
diff --git a/backend/internal/config/config_test.go b/backend/internal/config/config_test.go
index a307ac693f..718913a044 100644
--- a/backend/internal/config/config_test.go
+++ b/backend/internal/config/config_test.go
@@ -548,7 +548,7 @@ func TestLoadDefaultGrokFreeQuotaSoftGate(t *testing.T) {
 	require.Equal(t, int64(500_000), cfg.Gateway.Grok.FreeQuotaTokenLimit)
 	require.Equal(t, 95, cfg.Gateway.Grok.FreeQuotaSoftGatePercent)
 	require.Equal(t, 24, cfg.Gateway.Grok.FreeQuotaWindowHours)
-	require.Equal(t, 5, cfg.Gateway.Grok.FreeQuotaStatsCacheSeconds)
+	require.Equal(t, 60, cfg.Gateway.Grok.FreeQuotaStatsCacheSeconds)
 }
 
 func TestLoadDefaultOpenAIHTTP2Enabled(t *testing.T) {
diff --git a/backend/internal/handler/gateway_web_search.go b/backend/internal/handler/gateway_web_search.go
index e7e02d2822..a0a249f252 100644
--- a/backend/internal/handler/gateway_web_search.go
+++ b/backend/internal/handler/gateway_web_search.go
@@ -71,6 +71,31 @@ func (h *GatewayHandler) WebSearch(c *gin.Context) {
 		return
 	}
 
+	subject, _ := middleware2.GetAuthSubjectFromContext(c)
+	reqLog := requestLogger(c, "handler.gateway.web_search")
+	// Audit user search query before upstream Grok web_search traffic.
+	auditBody, _ := json.Marshal(map[string]any{
+		"messages": []map[string]any{{
+			"role": "user", "content": req.Query,
+		}},
+	})
+	if decision := h.checkSecurityAudit(c, reqLog, apiKey, subject, service.ContentModerationProtocolOpenAIChat, xai.DefaultTextModel, auditBody); decision != nil && !decision.AllowNextStage {
+		status := decision.HTTPStatus
+		if status == 0 {
+			status = http.StatusForbidden
+		}
+		code := decision.ErrorCode
+		if code == "" {
+			code = "content_policy_violation"
+		}
+		msg := decision.ClientMessage
+		if msg == "" {
+			msg = "Request blocked by content policy"
+		}
+		c.JSON(status, gin.H{"error": gin.H{"type": code, "message": msg}})
+		return
+	}
+
 	// Use exactly the same scheduling as other requests (SelectAccountWithLoadAwareness handles load, rate limit, sticky, etc.)
 	groupID := apiKey.GroupID
 	if groupID == nil {
@@ -174,11 +199,13 @@ func (h *GatewayHandler) WebSearch(c *gin.Context) {
 	// Request IDs are billing idempotency keys, so they must be unique per invocation.
 	// Query/IP/UA hashes would collapse repeated identical searches into one charge.
 	searchRequestID := "web_search:" + uuid.NewString()
-	if apiKey.Group != nil && (apiKey.Group.GetSearchPricePer1k() == nil || *apiKey.Group.GetSearchPricePer1k() <= 0) {
-		logger.L().With(
-			zap.String("component", "handler.gateway.web_search"),
-			zap.Int64("group_id", apiKey.Group.ID),
-		).Warn("gateway.web_search.search_price_per_1k_unset_free")
+	if apiKey.Group != nil {
+		if p := apiKey.Group.GetSearchPricePer1k(); p != nil && *p == 0 {
+			logger.L().With(
+				zap.String("component", "handler.gateway.web_search"),
+				zap.Int64("group_id", apiKey.Group.ID),
+			).Info("gateway.web_search.search_price_per_1k_explicit_free")
+		}
 	}
 	h.submitMandatoryUsageRecordTask(c.Request.Context(), func(ctx context.Context) {
 		if err := h.gatewayService.RecordUsage(ctx, &service.RecordUsageInput{
diff --git a/backend/internal/handler/grok_audio.go b/backend/internal/handler/grok_audio.go
index d721bcab3c..542d70d423 100644
--- a/backend/internal/handler/grok_audio.go
+++ b/backend/internal/handler/grok_audio.go
@@ -2,6 +2,7 @@ package handler
 
 import (
 	"context"
+	"encoding/json"
 	"errors"
 	"io"
 	"net/http"
@@ -149,6 +150,24 @@ func (h *OpenAIGatewayHandler) GrokVoice(c *gin.Context, endpoint string) {
 		h.errorResponse(c, http.StatusBadRequest, "invalid_request_error", err.Error())
 		return
 	}
+	if endpoint == "tts" {
+		subject, _ := middleware2.GetAuthSubjectFromContext(c)
+		reqLog := requestLogger(c, "handler.openai_gateway.grok_voice", zap.String("endpoint", endpoint))
+		// TTS bodies use {"input":"..."} (and variants). Normalize to chat messages so
+		// content moderation extractors see the spoken text.
+		auditBody := body
+		if input := extractGrokTTSInputText(body); input != "" {
+			if b, err := json.Marshal(map[string]any{
+				"messages": []map[string]any{{"role": "user", "content": input}},
+			}); err == nil {
+				auditBody = b
+			}
+		}
+		if decision := h.checkSecurityAudit(c, reqLog, apiKey, subject, service.ContentModerationProtocolOpenAIChat, "grok-4.5", auditBody); decision != nil && !decision.AllowNextStage {
+			h.openAISecurityAuditError(c, decision)
+			return
+		}
+	}
 	contentType := c.GetHeader("Content-Type")
 	if strings.TrimSpace(contentType) == "" {
 		contentType = "application/json"
@@ -298,3 +317,22 @@ func readGrokVoiceGatewayBody(c *gin.Context) ([]byte, error) {
 	}
 	return io.ReadAll(c.Request.Body)
 }
+
+// extractGrokTTSInputText pulls the primary spoken text from a TTS JSON body.
+func extractGrokTTSInputText(body []byte) string {
+	if len(body) == 0 {
+		return ""
+	}
+	var payload map[string]any
+	if err := json.Unmarshal(body, &payload); err != nil {
+		return ""
+	}
+	for _, key := range []string{"input", "text", "prompt"} {
+		if v, ok := payload[key]; ok {
+			if s, ok := v.(string); ok {
+				return strings.TrimSpace(s)
+			}
+		}
+	}
+	return ""
+}
diff --git a/backend/internal/pkg/xai/models.go b/backend/internal/pkg/xai/models.go
index e108e5deb3..c25f489317 100644
--- a/backend/internal/pkg/xai/models.go
+++ b/backend/internal/pkg/xai/models.go
@@ -63,12 +63,12 @@ const (
 )
 
 // ModelMappingOptions controls optional expansions of the default mapping.
-// Cross-client wildcards (gpt-*/claude-*) are OFF unless explicitly enabled —
-// silent rewrite of foreign model names is opt-in for operators who want
-// Codex/Claude clients to talk to Grok groups without renaming models.
+// Cross-client wildcards (gpt-*/claude-*) default ON via settings
+// grok_cross_client_model_map_enabled so Codex/Claude clients keep working
+// against Grok groups (map to DefaultText / grok-4.5). Operators may disable.
 type ModelMappingOptions struct {
 	// DefaultText is the target for empty models and optional cross-client maps.
-	// Empty → DefaultTextModel.
+	// Empty → DefaultTextModel (grok-4.5).
 	DefaultText string
 	// EnableCrossClientMap merges gpt-*/codex-*/o*/claude-* → DefaultText.
 	EnableCrossClientMap bool
diff --git a/backend/internal/repository/migrations_runner.go b/backend/internal/repository/migrations_runner.go
index b28cef1ca3..58c1c86550 100644
--- a/backend/internal/repository/migrations_runner.go
+++ b/backend/internal/repository/migrations_runner.go
@@ -83,6 +83,11 @@ var migrationChecksumCompatibilityRules = map[string]migrationChecksumCompatibil
 	"123_fix_legacy_auth_source_grant_on_signup_defaults.sql": newMigrationChecksumCompatibilityRule("2ce43c2cd89e9f9e1febd34a407ed9e84d177386c5544b6f02c1f58a21129f57", "6cd33422f215dcd1f486ab6f35c0ea5805d9ca69bb25906d94bc649156657145"),
 	"159_batch_image_foundation.sql":                          newMigrationChecksumCompatibilityRule("d902b70982025ec519749faf058aab7631e82c3f48167b9a4ae4db718eb72cce", "82da85b5d98e67a0507647b873a40373e84538e4adafdeed6767c0ac8b6570b2"),
 	"161_batch_image_pricing_snapshot.sql":                    newMigrationChecksumCompatibilityRule("4012af3e43636cb6af22e0176d59d1fcc70615c0f310194329461ae462c4fbd6", "96d915c9b7a6941ae99039e0ff3f1a61481eb9bddd933d11c6fadb2274554e87"),
+	// 220 originally cleared video prices for all non-grok platforms (including composite);
+	// composite is now preserved because it may route to Grok accounts.
+	"220_clear_non_grok_video_generation_config.sql": newMigrationChecksumCompatibilityRule("85e320b9ec64f2d3fcd8cf705b2b4e76a7b49f7a57140c14bff97f32691c818b", "3da48c8fdffe6390325f43d08b8e353e0a365df43d44a78dbbe655d0deb18402"),
+	"219_group_search_price_per_1k.sql": newMigrationChecksumCompatibilityRule("e86786ebcc3b14206fd2d321380a4e50e80cdadbfcf4962c639255e6a14008db", "df6ffd71b97e30ec2c8fe7b95e15783042dea58c553e32701ee7c42a5619af80"),
+	"218_group_audio_voice_pricing.sql": newMigrationChecksumCompatibilityRule("40ee9f3a2af0e0a5e99dabc878fd0fe98be1011f26bcfcefcac7197f7081f0e7", "c2a5e5b4ffd6968ad1c10593289fbc11192cdea19fec3ed9bce3a84eff9a8351"),
 }
 
 // ApplyMigrations 将嵌入的 SQL 迁移文件应用到指定的数据库。
diff --git a/backend/internal/server/api_contract_test.go b/backend/internal/server/api_contract_test.go
index af689d2c46..b069711b58 100644
--- a/backend/internal/server/api_contract_test.go
+++ b/backend/internal/server/api_contract_test.go
@@ -886,7 +886,7 @@ func TestAPIContracts(t *testing.T) {
 					"hide_ccs_import_button": false,
 					"grok_default_text_model": "grok-4.5",
 					"grok_default_base_url_mode": "cli",
-					"grok_cross_client_model_map_enabled": false,
+					"grok_cross_client_model_map_enabled": true,
 					"purchase_subscription_enabled": false,
 					"purchase_subscription_url": "",
 					"table_default_page_size": 20,
@@ -1165,7 +1165,7 @@ func TestAPIContracts(t *testing.T) {
 					"hide_ccs_import_button": false,
 					"grok_default_text_model": "grok-4.5",
 					"grok_default_base_url_mode": "cli",
-					"grok_cross_client_model_map_enabled": false,
+					"grok_cross_client_model_map_enabled": true,
 					"purchase_subscription_enabled": false,
 					"purchase_subscription_url": "",
 					"table_default_page_size": 20,
diff --git a/backend/internal/server/routes/prompt_audit_route_coverage_test.go b/backend/internal/server/routes/prompt_audit_route_coverage_test.go
index e28e2760d4..8d376a0f0c 100644
--- a/backend/internal/server/routes/prompt_audit_route_coverage_test.go
+++ b/backend/internal/server/routes/prompt_audit_route_coverage_test.go
@@ -46,14 +46,14 @@ func TestEveryGatewayPOSTRouteIsClassifiedForPromptAuditCoverage(t *testing.T) {
 		"/videos/edits":             {"grok_media.go"},
 		"/videos/extensions":        {"grok_media.go"},
 		"/models/*modelAction":      {"gemini_v1beta_handler.go"},
+		"/tts":                       {"grok_audio.go"},
+		"/web_search":                {"gateway_web_search.go"},
 	}
 	excluded := map[string]string{
 		"/messages/count_tokens":     "tokenization only; it does not execute a model request",
 		"/images/batches/:id/cancel": "control-plane cancellation with no user prompt",
-		"/tts":                       "voice synthesis input is not a text-generation prompt",
 		"/stt":                       "speech transcription is not a text-generation prompt",
 		"/custom-voices":             "voice profile management has no model prompt",
-		"/web_search":                "search query is handled by the dedicated search workflow",
 	}
 
 	unclassified := make([]string, 0)
diff --git a/backend/internal/service/api_key_auth_cache_impl.go b/backend/internal/service/api_key_auth_cache_impl.go
index 125b593386..696f21bb25 100644
--- a/backend/internal/service/api_key_auth_cache_impl.go
+++ b/backend/internal/service/api_key_auth_cache_impl.go
@@ -14,7 +14,7 @@ import (
 	"github.com/dgraph-io/ristretto"
 )
 
-const apiKeyAuthSnapshotVersion = 18 // v18: include group profit control fields (force refresh of pre-fix snapshots)
+const apiKeyAuthSnapshotVersion = 19 // v19: group search/audio/video_model_prices billing fields (force refresh of pre-fix snapshots)
 
 type apiKeyAuthCacheConfig struct {
 	l1Size        int
diff --git a/backend/internal/service/api_key_auth_cache_profit_test.go b/backend/internal/service/api_key_auth_cache_profit_test.go
index 65bef3176f..40519f2896 100644
--- a/backend/internal/service/api_key_auth_cache_profit_test.go
+++ b/backend/internal/service/api_key_auth_cache_profit_test.go
@@ -53,7 +53,7 @@ func TestAPIKeyAuthSnapshotProfitControlRoundtrip(t *testing.T) {
 	snapshot := svc.snapshotFromAPIKey(context.Background(), apiKey)
 	require.NotNil(t, snapshot)
 	require.Equal(t, apiKeyAuthSnapshotVersion, snapshot.Version)
-	require.Equal(t, 18, snapshot.Version, "v18 起认证快照携带利润控制字段")
+	require.Equal(t, 19, snapshot.Version, "v19 起认证快照携带 search/audio/video_model_prices 计费字段")
 
 	// 模拟 L2 缓存的完整 JSON 往返（与 apiKeyCache.SetAuthCache/GetAuthCache 同构）。
 	payload, err := json.Marshal(&APIKeyAuthCacheEntry{Snapshot: snapshot})
diff --git a/backend/internal/service/billing_search_audio_cost_test.go b/backend/internal/service/billing_search_audio_cost_test.go
index 1347ba7231..94d2e5c659 100644
--- a/backend/internal/service/billing_search_audio_cost_test.go
+++ b/backend/internal/service/billing_search_audio_cost_test.go
@@ -10,7 +10,10 @@ func TestCalculateSearchCost(t *testing.T) {
 	t.Parallel()
 	s := &BillingService{}
 	require.Equal(t, 0.0, s.CalculateSearchCost(0, floatPtr(10), 1).ActualCost)
-	require.Equal(t, 0.0, s.CalculateSearchCost(5, nil, 1).ActualCost)
+	// nil price → default $10/1k: 5 calls = 0.05
+	require.InDelta(t, 0.05, s.CalculateSearchCost(5, nil, 1).ActualCost, 1e-9)
+	// explicit 0 → free
+	require.Equal(t, 0.0, s.CalculateSearchCost(5, floatPtr(0), 1).ActualCost)
 	price := 10.0
 	cost := s.CalculateSearchCost(100, &price, 1.5)
 	// 10 / 1000 * 100 * 1.5 = 1.5
@@ -27,6 +30,13 @@ func TestCalculateAudioCost(t *testing.T) {
 	require.InDelta(t, 1.5, s.CalculateAudioCost("tts", 0.1, cfg, 1).ActualCost, 1e-9)
 	require.InDelta(t, 0.25, s.CalculateAudioCost("stt", 0.5, cfg, 1).ActualCost, 1e-9)
 	require.Equal(t, 0.0, s.CalculateAudioCost("unknown", 1, cfg, 1).ActualCost)
+	// nil config → defaults (realtime $0.10/min, tts $15/M, stt $0.36/hr)
+	require.InDelta(t, 0.10, s.CalculateAudioCost("realtime", 1, nil, 1).ActualCost, 1e-9)
+	require.InDelta(t, 15.0, s.CalculateAudioCost("tts", 1, nil, 1).ActualCost, 1e-9)
+	require.InDelta(t, 0.36, s.CalculateAudioCost("stt", 1, nil, 1).ActualCost, 1e-9)
+	// explicit 0 → free
+	zero := 0.0
+	require.Equal(t, 0.0, s.CalculateAudioCost("realtime", 1, &audioPriceConfig{RealtimePerMin: &zero}, 1).ActualCost)
 }
 
 func floatPtr(v float64) *float64 { return &v }
diff --git a/backend/internal/service/billing_service.go b/backend/internal/service/billing_service.go
index bc855124d1..2b11fc978d 100644
--- a/backend/internal/service/billing_service.go
+++ b/backend/internal/service/billing_service.go
@@ -1437,6 +1437,15 @@ const (
 
 	// Codex alpha/search 网页搜索单次默认价：OpenAI 官方 web search 定价 $10/1000 次。
 	defaultWebSearchPricePerCall = 0.01
+
+	// Grok /v1/web_search 与 SearchCount 附加费：与 Codex 对齐 $10/1000 次（按 1k 计价字段存储）。
+	defaultSearchPricePer1k = 10.0
+
+	// Grok Voice 默认价（分组列 NULL 时使用；显式配 0 表示免费）。
+	// 保守运营占位，运维可通过 groups.audio_* 覆盖。
+	defaultAudioRealtimePricePerMin     = 0.10
+	defaultAudioTTSPricePerMillionChars = 15.0
+	defaultAudioSTTPricePerHour         = 0.36
 )
 
 // CalculateWebSearchCost 计算 Codex alpha/search 网页搜索按次费用。
@@ -1465,18 +1474,25 @@ func (s *BillingService) CalculateWebSearchCost(callCount int, groupPrice *float
 }
 
 // CalculateSearchCost bills search/tool invocations (e.g. web_search) per 1k calls.
-// Uses explicit group search_price_per_1k when set; otherwise returns zero cost.
+// groupPricePer1k: nil → defaultSearchPricePer1k; explicit 0 → free; >0 → that rate.
 func (s *BillingService) CalculateSearchCost(numCalls int, groupPricePer1k *float64, rateMultiplier float64) *CostBreakdown {
 	if numCalls <= 0 {
 		return &CostBreakdown{}
 	}
-	if groupPricePer1k == nil || *groupPricePer1k <= 0 {
+	pricePer1k := defaultSearchPricePer1k
+	if groupPricePer1k != nil {
+		if *groupPricePer1k < 0 {
+			return &CostBreakdown{}
+		}
+		pricePer1k = *groupPricePer1k
+	}
+	if pricePer1k == 0 {
 		return &CostBreakdown{}
 	}
 	if rateMultiplier < 0 {
 		rateMultiplier = 0
 	}
-	unit := *groupPricePer1k / 1000.0
+	unit := pricePer1k / 1000.0
 	total := unit * float64(numCalls)
 	return &CostBreakdown{
 		TotalCost:   total,
@@ -1492,6 +1508,7 @@ type audioPriceConfig struct {
 }
 
 // CalculateAudioCost supports realtime (per min), tts (per M chars), stt (per hr).
+// Missing group prices use defaults; explicit 0 means free for that mode.
 func (s *BillingService) CalculateAudioCost(mode string, durationOrUnits float64, groupConfig *audioPriceConfig, rateMultiplier float64) *CostBreakdown {
 	if durationOrUnits <= 0 {
 		return &CostBreakdown{}
@@ -1499,14 +1516,17 @@ func (s *BillingService) CalculateAudioCost(mode string, durationOrUnits float64
 	var unitPrice float64
 	switch strings.ToLower(mode) {
 	case "realtime":
+		unitPrice = defaultAudioRealtimePricePerMin
 		if groupConfig != nil && groupConfig.RealtimePerMin != nil {
 			unitPrice = *groupConfig.RealtimePerMin
 		}
 	case "tts":
+		unitPrice = defaultAudioTTSPricePerMillionChars
 		if groupConfig != nil && groupConfig.TTSPerMChars != nil {
 			unitPrice = *groupConfig.TTSPerMChars
 		}
 	case "stt":
+		unitPrice = defaultAudioSTTPricePerHour
 		if groupConfig != nil && groupConfig.STTPerHour != nil {
 			unitPrice = *groupConfig.STTPerHour
 		}
diff --git a/backend/internal/service/gateway_usage_billing.go b/backend/internal/service/gateway_usage_billing.go
index 1c47a87169..ee212afde1 100644
--- a/backend/internal/service/gateway_usage_billing.go
+++ b/backend/internal/service/gateway_usage_billing.go
@@ -864,8 +864,8 @@ func (s *GatewayService) calculateRecordUsageCost(
 	tokenCost := s.calculateTokenCost(ctx, result, apiKey, billingModel, multiplier, opts)
 	if result.SearchCount > 0 {
 		price := groupSearchPricePer1kFromAPIKey(apiKey)
-		if price == nil || *price <= 0 {
-			logger.LegacyPrintf("service.gateway", "[Billing] search_price_per_1k unset; search calls free group_model=%s count=%d", billingModel, result.SearchCount)
+		if price != nil && *price == 0 {
+			logger.LegacyPrintf("service.gateway", "[Billing] search_price_per_1k explicit 0; search free group_model=%s count=%d", billingModel, result.SearchCount)
 		}
 		searchCost := s.billingService.CalculateSearchCost(result.SearchCount, price, multiplier)
 		if searchCost != nil && (searchCost.TotalCost > 0 || searchCost.ActualCost > 0) {
diff --git a/backend/internal/service/grok_free_quota_gate.go b/backend/internal/service/grok_free_quota_gate.go
index 323776cd31..7033d6911b 100644
--- a/backend/internal/service/grok_free_quota_gate.go
+++ b/backend/internal/service/grok_free_quota_gate.go
@@ -19,7 +19,7 @@ import (
 //   - free_quota_token_limit           (int64, default 500_000)
 //   - free_quota_soft_gate_percent     (int, default 95) — stop scheduling before the nominal limit
 //   - free_quota_window_hours          (int, default 24) — local usage rolling window
-//   - free_quota_stats_cache_seconds   (int, default 5) — bound hot-path aggregate query frequency
+//   - free_quota_stats_cache_seconds   (int, default 60) — stats cache TTL; hot path never waits on DB
 //
 // Soft-gate applies only to *explicit* free OAuth (subscription_tier/plan_type ==
 // "free"). Media/cache free detection uses isKnownGrokFreeAccount instead.
@@ -127,6 +127,9 @@ func (s *GatewayService) filterGrokFreeQuotaAccountsForGateway(ctx context.Conte
 var gatewayGrokFreeQuotaGateCache sync.Map
 var openaiGrokFreeQuotaGateCache sync.Map
 
+// freeQuotaRefreshInFlight coalesces concurrent background refreshes per cache map.
+var freeQuotaRefreshInFlight sync.Map // *sync.Map -> *sync.Map (accountID -> struct{})
+
 func filterGrokFreeQuotaAccountsCore(
 	ctx context.Context,
 	cfg *config.Config,
@@ -160,6 +163,7 @@ func filterGrokFreeQuotaAccountsCore(
 				continue
 			}
 		}
+		// Miss / stale: fail open on this request; refresh asynchronously.
 		if _, exists := seenMissing[account.ID]; !exists {
 			seenMissing[account.ID] = struct{}{}
 			missingIDs = append(missingIDs, account.ID)
@@ -167,40 +171,7 @@ func filterGrokFreeQuotaAccountsCore(
 	}
 
 	if len(missingIDs) > 0 {
-		statsByID, err := queryGrokFreeQuotaWindowStats(ctx, usageLogRepo, missingIDs, now.Add(-settings.window))
-		if err != nil {
-			grokFreeQuotaGateQueryFailureTotal.Add(1)
-			if settings.cacheTTL > 0 {
-				for _, accountID := range missingIDs {
-					cache.Store(accountID, grokFreeQuotaGateCacheEntry{checkedAt: now})
-				}
-			}
-			slog.Warn("grok_free_quota_soft_gate_stats_failed",
-				"account_count", len(missingIDs),
-				"window_hours", settings.window.Hours(),
-				"error", err)
-		} else {
-			for _, accountID := range missingIDs {
-				tokens := int64(0)
-				if stats := statsByID[accountID]; stats != nil && stats.Tokens > 0 {
-					tokens = stats.Tokens
-				}
-				tokensByID[accountID] = tokens
-				cache.Store(accountID, grokFreeQuotaGateCacheEntry{tokens: tokens, checkedAt: now, known: true})
-				if tokens >= settings.gateTokens {
-					grokFreeQuotaGateBlockedTotal.Add(1)
-					slog.Info("grok_free_quota_soft_gate_blocked",
-						"account_id", accountID,
-						"tokens", tokens,
-						"gate_tokens", settings.gateTokens,
-						"limit_tokens", settings.limitTokens,
-						"window_hours", settings.window.Hours())
-				}
-			}
-		}
-		// Only sweep on the query path: it is already TTL-bounded, so the Range
-		// cost stays off the cache-hit hot path.
-		sweepGrokFreeQuotaGateCache(cache, now, settings.cacheTTL)
+		scheduleGrokFreeQuotaStatsRefresh(usageLogRepo, cache, settings, missingIDs)
 	}
 
 	filtered := make([]Account, 0, len(accounts))
@@ -216,6 +187,76 @@ func filterGrokFreeQuotaAccountsCore(
 	return filtered
 }
 
+// scheduleGrokFreeQuotaStatsRefresh loads usage stats off the request path.
+// Concurrent callers for the same accountID are coalesced via in-flight markers.
+func scheduleGrokFreeQuotaStatsRefresh(
+	usageLogRepo UsageLogRepository,
+	cache *sync.Map,
+	settings grokFreeQuotaGateSettings,
+	accountIDs []int64,
+) {
+	if usageLogRepo == nil || cache == nil || len(accountIDs) == 0 {
+		return
+	}
+	inFlightRoot, _ := freeQuotaRefreshInFlight.LoadOrStore(cache, &sync.Map{})
+	inFlight := inFlightRoot.(*sync.Map)
+
+	toFetch := make([]int64, 0, len(accountIDs))
+	for _, id := range accountIDs {
+		if _, loaded := inFlight.LoadOrStore(id, struct{}{}); !loaded {
+			toFetch = append(toFetch, id)
+		}
+	}
+	if len(toFetch) == 0 {
+		return
+	}
+
+	window := settings.window
+	gateTokens := settings.gateTokens
+	limitTokens := settings.limitTokens
+	cacheTTL := settings.cacheTTL
+	go func() {
+		defer func() {
+			for _, id := range toFetch {
+				inFlight.Delete(id)
+			}
+		}()
+		now := time.Now().UTC()
+		statsByID, err := queryGrokFreeQuotaWindowStats(context.Background(), usageLogRepo, toFetch, now.Add(-window))
+		if err != nil {
+			grokFreeQuotaGateQueryFailureTotal.Add(1)
+			if cacheTTL > 0 {
+				for _, accountID := range toFetch {
+					cache.Store(accountID, grokFreeQuotaGateCacheEntry{checkedAt: now})
+				}
+			}
+			slog.Warn("grok_free_quota_soft_gate_stats_failed",
+				"account_count", len(toFetch),
+				"window_hours", window.Hours(),
+				"error", err)
+			sweepGrokFreeQuotaGateCache(cache, now, cacheTTL)
+			return
+		}
+		for _, accountID := range toFetch {
+			tokens := int64(0)
+			if stats := statsByID[accountID]; stats != nil && stats.Tokens > 0 {
+				tokens = stats.Tokens
+			}
+			cache.Store(accountID, grokFreeQuotaGateCacheEntry{tokens: tokens, checkedAt: now, known: true})
+			if tokens >= gateTokens {
+				grokFreeQuotaGateBlockedTotal.Add(1)
+				slog.Info("grok_free_quota_soft_gate_blocked",
+					"account_id", accountID,
+					"tokens", tokens,
+					"gate_tokens", gateTokens,
+					"limit_tokens", limitTokens,
+					"window_hours", window.Hours())
+			}
+		}
+		sweepGrokFreeQuotaGateCache(cache, now, cacheTTL)
+	}()
+}
+
 // grokFreeQuotaGateCacheMinSweepAge floors the eviction age so a tiny cacheTTL
 // does not turn the cache into a per-call re-query.
 const grokFreeQuotaGateCacheMinSweepAge = 5 * time.Minute
diff --git a/backend/internal/service/grok_free_quota_gate_test.go b/backend/internal/service/grok_free_quota_gate_test.go
index 28c9afbd88..b1f8d604fa 100644
--- a/backend/internal/service/grok_free_quota_gate_test.go
+++ b/backend/internal/service/grok_free_quota_gate_test.go
@@ -59,7 +59,7 @@ func grokFreeQuotaTestConfig() *config.Config {
 	cfg.Gateway.Grok.FreeQuotaTokenLimit = 500_000
 	cfg.Gateway.Grok.FreeQuotaSoftGatePercent = 95
 	cfg.Gateway.Grok.FreeQuotaWindowHours = 24
-	cfg.Gateway.Grok.FreeQuotaStatsCacheSeconds = 5
+	cfg.Gateway.Grok.FreeQuotaStatsCacheSeconds = 60
 	return cfg
 }
 
@@ -67,6 +67,8 @@ func TestFilterGrokFreeQuotaAccountsOnlyBlocksExplicitFreeOAuth(t *testing.T) {
 	repo := &grokFreeQuotaUsageRepoStub{stats: map[int64]*usagestats.AccountStats{
 		1: {Tokens: 475_000}, // 95% of 500k
 	}}
+	// Clear shared cache for deterministic unit tests.
+	openaiGrokFreeQuotaGateCache = sync.Map{}
 	scheduler := &defaultOpenAIAccountScheduler{service: &OpenAIGatewayService{cfg: grokFreeQuotaTestConfig(), usageLogRepo: repo}}
 	accounts := []Account{
 		{ID: 1, Platform: PlatformGrok, Type: AccountTypeOAuth, Credentials: map[string]any{"subscription_tier": "FREE"}},
@@ -75,15 +77,26 @@ func TestFilterGrokFreeQuotaAccountsOnlyBlocksExplicitFreeOAuth(t *testing.T) {
 		{ID: 4, Platform: PlatformGrok, Type: AccountTypeAPIKey, Credentials: map[string]any{"subscription_tier": "FREE"}},
 	}
 
+	// First pass: cache miss fails open (does not block) and schedules background refresh.
 	filtered := scheduler.filterGrokFreeQuotaAccounts(context.Background(), accounts)
+	require.Equal(t, []int64{1, 2, 3, 4}, accountIDs(filtered), "miss fails open on hot path")
+
+	require.Eventually(t, func() bool {
+		repo.mu.Lock()
+		defer repo.mu.Unlock()
+		return repo.calls >= 1
+	}, 2*time.Second, 10*time.Millisecond)
+
+	// Second pass: uses refreshed cache and blocks over-gate free OAuth.
+	filtered = scheduler.filterGrokFreeQuotaAccounts(context.Background(), accounts)
 	require.Equal(t, []int64{2, 3, 4}, accountIDs(filtered), "paid and unknown fail-open; API-key free marker is not gated")
-	require.Equal(t, 1, repo.calls)
 	require.Equal(t, []int64{1}, repo.lastIDs, "paid, unknown, and API-key accounts must not enter the local free-tier query")
 	require.WithinDuration(t, time.Now().UTC().Add(-24*time.Hour), repo.start, time.Second)
 }
 
 func TestFilterGrokFreeQuotaAccountsStatsFailureFailsOpen(t *testing.T) {
 	repo := &grokFreeQuotaUsageRepoStub{err: errors.New("usage database unavailable")}
+	openaiGrokFreeQuotaGateCache = sync.Map{}
 	scheduler := &defaultOpenAIAccountScheduler{service: &OpenAIGatewayService{cfg: grokFreeQuotaTestConfig(), usageLogRepo: repo}}
 	accounts := []Account{{
 		ID: 1, Platform: PlatformGrok, Type: AccountTypeOAuth,
@@ -92,7 +105,12 @@ func TestFilterGrokFreeQuotaAccountsStatsFailureFailsOpen(t *testing.T) {
 
 	filtered := scheduler.filterGrokFreeQuotaAccounts(context.Background(), accounts)
 	require.Equal(t, []int64{1}, accountIDs(filtered))
-	// Cache the failure entry so a second call still fails open without re-query thrash.
+	require.Eventually(t, func() bool {
+		repo.mu.Lock()
+		defer repo.mu.Unlock()
+		return repo.calls >= 1
+	}, 2*time.Second, 10*time.Millisecond)
+	// Negative cache entry keeps subsequent hot-path calls fail-open without thrash.
 	filtered = scheduler.filterGrokFreeQuotaAccounts(context.Background(), accounts)
 	require.Equal(t, []int64{1}, accountIDs(filtered))
 	require.Equal(t, 1, repo.calls)
@@ -118,23 +136,36 @@ func TestFilterGrokFreeQuotaAccountsRecoversAfterRollingUsageFalls(t *testing.T)
 	repo := &grokFreeQuotaUsageRepoStub{stats: map[int64]*usagestats.AccountStats{
 		1: {Tokens: 490_000},
 	}}
+	openaiGrokFreeQuotaGateCache = sync.Map{}
 	scheduler := &defaultOpenAIAccountScheduler{service: &OpenAIGatewayService{cfg: grokFreeQuotaTestConfig(), usageLogRepo: repo}}
 	accounts := []Account{{
 		ID: 1, Platform: PlatformGrok, Type: AccountTypeOAuth,
 		Credentials: map[string]any{"plan_type": "free"},
 	}}
 
-	require.Empty(t, scheduler.filterGrokFreeQuotaAccounts(context.Background(), accounts))
+	// Miss fails open, then background fill blocks over-gate account.
+	require.Equal(t, []int64{1}, accountIDs(scheduler.filterGrokFreeQuotaAccounts(context.Background(), accounts)))
+	require.Eventually(t, func() bool {
+		filtered := scheduler.filterGrokFreeQuotaAccounts(context.Background(), accounts)
+		return len(filtered) == 0
+	}, 2*time.Second, 10*time.Millisecond)
+
 	repo.mu.Lock()
 	repo.stats[1] = &usagestats.AccountStats{Tokens: 100_000}
 	repo.mu.Unlock()
-	require.Empty(t, scheduler.filterGrokFreeQuotaAccounts(context.Background(), accounts), "fresh cache keeps the short soft-gate hold")
+	// Fresh positive cache still holds the soft-gate until TTL expires.
+	require.Empty(t, scheduler.filterGrokFreeQuotaAccounts(context.Background(), accounts), "fresh cache keeps the soft-gate hold")
 
+	// Expire entry → miss fails open and schedules refresh with recovered usage.
 	scheduler.grokFreeQuotaGateCache.Store(int64(1), grokFreeQuotaGateCacheEntry{
 		tokens: 490_000, checkedAt: time.Now().Add(-time.Minute), known: true,
 	})
 	require.Equal(t, []int64{1}, accountIDs(scheduler.filterGrokFreeQuotaAccounts(context.Background(), accounts)))
-	require.Equal(t, 2, repo.calls)
+	require.Eventually(t, func() bool {
+		filtered := scheduler.filterGrokFreeQuotaAccounts(context.Background(), accounts)
+		return len(filtered) == 1 && filtered[0].ID == 1
+	}, 2*time.Second, 10*time.Millisecond)
+	require.GreaterOrEqual(t, repo.calls, 2)
 }
 
 func TestResolveGrokFreeQuotaGateSettingsDefaultsToNinetyFivePercent(t *testing.T) {
@@ -159,6 +190,7 @@ func TestIsExplicitGrokFreeOAuthAccount_OnlyExactFree(t *testing.T) {
 func TestOpenAIAccountSchedulerLoadBalanceAppliesGrokFreeQuotaGate(t *testing.T) {
 	cfg := grokFreeQuotaTestConfig()
 	cfg.RunMode = config.RunModeSimple
+	openaiGrokFreeQuotaGateCache = sync.Map{}
 	accounts := []Account{
 		{ID: 1, Platform: PlatformGrok, Type: AccountTypeOAuth, Status: StatusActive, Schedulable: true, Concurrency: 1, Credentials: map[string]any{"subscription_tier": "free"}},
 		{ID: 2, Platform: PlatformGrok, Type: AccountTypeOAuth, Status: StatusActive, Schedulable: true, Concurrency: 1, Credentials: map[string]any{"subscription_tier": "pro"}},
@@ -172,6 +204,13 @@ func TestOpenAIAccountSchedulerLoadBalanceAppliesGrokFreeQuotaGate(t *testing.T)
 	}
 	scheduler := &defaultOpenAIAccountScheduler{service: svc, stats: newOpenAIAccountRuntimeStats()}
 
+	// Warm cache via background refresh so load-balance sees the soft-gate.
+	_ = scheduler.filterGrokFreeQuotaAccounts(context.Background(), accounts)
+	require.Eventually(t, func() bool {
+		filtered := scheduler.filterGrokFreeQuotaAccounts(context.Background(), accounts)
+		return len(accountIDs(filtered)) == 1 && accountIDs(filtered)[0] == 2
+	}, 2*time.Second, 10*time.Millisecond)
+
 	selection, _, _, _, err := scheduler.selectByLoadBalance(context.Background(), OpenAIAccountScheduleRequest{Platform: PlatformGrok})
 	require.NoError(t, err)
 	require.NotNil(t, selection)
@@ -191,9 +230,13 @@ func TestGrokFreeQuotaGateIsSchedulerOnlyAdminPathUnfiltered(t *testing.T) {
 	repo := &grokFreeQuotaUsageRepoStub{stats: map[int64]*usagestats.AccountStats{
 		9: {Tokens: 500_000},
 	}}
+	openaiGrokFreeQuotaGateCache = sync.Map{}
 	scheduler := &defaultOpenAIAccountScheduler{service: &OpenAIGatewayService{cfg: grokFreeQuotaTestConfig(), usageLogRepo: repo}}
 	overGate := Account{ID: 9, Platform: PlatformGrok, Type: AccountTypeOAuth, Credentials: map[string]any{"subscription_tier": "FREE"}}
-	require.Empty(t, scheduler.filterGrokFreeQuotaAccounts(context.Background(), []Account{overGate}))
+	require.Eventually(t, func() bool {
+		_ = scheduler.filterGrokFreeQuotaAccounts(context.Background(), []Account{overGate})
+		return len(scheduler.filterGrokFreeQuotaAccounts(context.Background(), []Account{overGate})) == 0
+	}, 2*time.Second, 10*time.Millisecond)
 	// Without going through the scheduler filter, the account object itself is unchanged.
 	require.True(t, isExplicitGrokFreeOAuthAccount(&overGate))
 	require.Equal(t, int64(9), overGate.ID)
@@ -240,13 +283,15 @@ func TestFilterGrokFreeQuotaAccountsEvictsDepartedAccounts(t *testing.T) {
 	accounts := []Account{
 		{ID: 1, Platform: PlatformGrok, Type: AccountTypeOAuth, Credentials: map[string]any{"subscription_tier": "FREE"}},
 	}
+	// First call schedules async refresh + may not have finished sweep yet.
+	_ = filterGrokFreeQuotaAccountsCore(context.Background(), grokFreeQuotaTestConfig(), repo, &cache, accounts)
+	require.Eventually(t, func() bool {
+		_, departedStillCached := cache.Load(int64(99))
+		_, freshCached := cache.Load(int64(1))
+		return !departedStillCached && freshCached
+	}, 2*time.Second, 10*time.Millisecond)
 	filtered := filterGrokFreeQuotaAccountsCore(context.Background(), grokFreeQuotaTestConfig(), repo, &cache, accounts)
 	require.Equal(t, []int64{1}, accountIDs(filtered))
-
-	_, departedStillCached := cache.Load(int64(99))
-	require.False(t, departedStillCached)
-	_, freshCached := cache.Load(int64(1))
-	require.True(t, freshCached)
 }
 
 func accountIDs(accounts []Account) []int64 {
diff --git a/backend/internal/service/openai_gateway_search_surcharge_test.go b/backend/internal/service/openai_gateway_search_surcharge_test.go
index f77776709d..fd3eefe4b4 100644
--- a/backend/internal/service/openai_gateway_search_surcharge_test.go
+++ b/backend/internal/service/openai_gateway_search_surcharge_test.go
@@ -82,4 +82,37 @@ func TestGroupMediaPricingLooksIncomplete_VideoModelPricesComplete(t *testing.T)
 			"grok-imagine-video": {"720p": 0.1},
 		},
 	}))
+	price := 10.0
+	require.False(t, groupMediaPricingLooksIncomplete(&Group{SearchPricePer1k: &price}))
+	require.False(t, groupMediaPricingLooksIncomplete(&Group{AudioRealtimePricePerMin: &price}))
+	// Legacy video price alone still marks complete (existing path).
+	require.False(t, groupMediaPricingLooksIncomplete(&Group{VideoPrice720P: &price}))
+}
+
+func TestCalculateOpenAIRecordUsageCost_TokenPricingErrorNotSwallowedBySearch(t *testing.T) {
+	t.Parallel()
+
+	price := 10.0
+	svc := &OpenAIGatewayService{
+		billingService: newTestBillingService(),
+	}
+	apiKey := &APIKey{
+		Group: &Group{SearchPricePer1k: &price},
+	}
+	// Unknown model → token pricing fails; search must not replace that with $0/$search bill.
+	cost, err := svc.calculateOpenAIRecordUsageCost(
+		context.Background(),
+		&OpenAIForwardResult{SearchCount: 100},
+		apiKey,
+		[]string{"totally-unknown-model-xyz-no-pricing"},
+		1.0,
+		1.0,
+		1.0,
+		1.0,
+		UsageTokens{InputTokens: 1000, OutputTokens: 500},
+		"",
+		false,
+	)
+	require.Error(t, err)
+	require.Nil(t, cost)
 }
diff --git a/backend/internal/service/openai_gateway_usage.go b/backend/internal/service/openai_gateway_usage.go
index 67125f3451..1bba5fce72 100644
--- a/backend/internal/service/openai_gateway_usage.go
+++ b/backend/internal/service/openai_gateway_usage.go
@@ -496,14 +496,13 @@ func (s *OpenAIGatewayService) calculateOpenAIRecordUsageCost(
 			lastErr = err
 		}
 	}
-	// Search-only (e.g. no model / zero tokens): still bill search when priced.
+	// Search surcharge is additive. Never let a zero/default search cost mask a
+	// real token-pricing failure for requests that attempted token billing.
 	searchCost := (*CostBreakdown)(nil)
 	if result != nil && result.SearchCount > 0 {
 		price := groupSearchPricePer1kFromAPIKey(apiKey)
-		if price == nil || *price <= 0 {
-			// Silent free search is a revenue leak; error-level so ops/alerts notice.
-			// Billing still proceeds at $0 so requests are not failed mid-flight.
-			logger.L().Error("openai_usage.search_price_per_1k_unset_free",
+		if price != nil && *price == 0 {
+			logger.L().Info("openai_usage.search_price_per_1k_explicit_free",
 				zap.Int("search_count", result.SearchCount),
 				zap.String("model", billingModel),
 				zap.Int64("api_key_id", apiKey.ID),
@@ -513,18 +512,23 @@ func (s *OpenAIGatewayService) calculateOpenAIRecordUsageCost(
 		searchCost = s.billingService.CalculateSearchCost(result.SearchCount, price, webSearchMultiplier)
 	}
 
-	if tokenCost == nil && searchCost == nil {
-		if lastErr == nil {
-			if len(billingModels) == 0 || billingModel == "" {
-				return nil, errors.New("openai usage billing model is empty")
+	tokenBillingAttempted := len(billingModels) > 0 && billingModel != ""
+	if tokenCost == nil {
+		if tokenBillingAttempted {
+			if lastErr == nil {
+				lastErr = errors.New("no non-empty billing model candidates")
 			}
-			lastErr = errors.New("no non-empty billing model candidates")
+			return nil, fmt.Errorf("calculate OpenAI usage cost failed for billing models %s: %w", strings.Join(billingModels, ","), lastErr)
+		}
+		// Search-only (no model / pure tool path): allow search billing alone.
+		if searchCost != nil {
+			return searchCost, nil
+		}
+		if lastErr == nil {
+			lastErr = errors.New("openai usage billing model is empty")
 		}
 		return nil, fmt.Errorf("calculate OpenAI usage cost failed for billing models %s: %w", strings.Join(billingModels, ","), lastErr)
 	}
-	if tokenCost == nil {
-		return searchCost, nil
-	}
 	if searchCost == nil || (searchCost.TotalCost == 0 && searchCost.ActualCost == 0) {
 		return tokenCost, nil
 	}
@@ -705,10 +709,14 @@ func (s *OpenAIGatewayService) apiKeyWithFreshGroupMediaPricing(ctx context.Cont
 	return &clone
 }
 
-// groupMediaPricingLooksIncomplete 判断分组对象是否可能缺失媒体计费字段（例如由不含
-// 这些字段的旧快照或手工构造的上下文对象生成）。image/video 独立倍率在数据库中的
-// 默认值均为 1.0，正常加载的分组不可能两个倍率同时为 0 且未开启独立倍率、全部媒体
-// 价为 nil——只有这种情况才回源查库，避免对未配置覆盖价的分组每条媒体用量都多打一次 DB 查询。
+// groupMediaPricingLooksIncomplete 判断分组对象是否可能缺失媒体/搜索/语音计费字段
+// （例如由不含这些字段的旧快照或手工构造的上下文对象生成）。image/video 独立倍率在
+// 数据库中的默认值均为 1.0；正常加载的分组不可能两个倍率同时为 0 且未开启独立倍率、
+// 全部媒体/搜索/语音价为 nil——只有这种情况才回源查库，避免对未配置覆盖价的分组每条
+// 用量都多打一次 DB 查询。
+//
+// 注意：apiKeyAuthSnapshotVersion 升级会强制刷新存量快照；本函数是热路径上的二次兜底，
+// 不能仅凭 legacy video_price_* 判定完整而跳过 VideoModelPrices/search/audio 的回源。
 func groupMediaPricingLooksIncomplete(group *Group) bool {
 	if group == nil {
 		return true
@@ -719,11 +727,17 @@ func groupMediaPricingLooksIncomplete(group *Group) bool {
 	if group.ImageRateMultiplier != 0 || group.VideoRateMultiplier != 0 {
 		return false
 	}
-	// Per-model video prices are first-class billing config; a projection that
-	// already carries them is complete enough to skip a DB refresh.
+	// Any first-class pricing field present means the projection is not a blank shell.
 	if len(group.VideoModelPrices) > 0 {
 		return false
 	}
+	if group.SearchPricePer1k != nil ||
+		group.AudioRealtimePricePerMin != nil ||
+		group.AudioTTSPricePerMillionChars != nil ||
+		group.AudioSTTPricePerHour != nil ||
+		group.WebSearchPricePerCall != nil {
+		return false
+	}
 	return group.ImagePrice1K == nil && group.ImagePrice2K == nil && group.ImagePrice4K == nil &&
 		group.VideoPrice480P == nil && group.VideoPrice720P == nil && group.VideoPrice1080P == nil
 }
diff --git a/backend/internal/service/setting_parse.go b/backend/internal/service/setting_parse.go
index 28b55ee35a..4e033b3543 100644
--- a/backend/internal/service/setting_parse.go
+++ b/backend/internal/service/setting_parse.go
@@ -190,7 +190,7 @@ func (s *SettingService) InitializeDefaultSettings(ctx context.Context) error {
 
 		// Grok: safe defaults — no cross-vendor model rewrite unless operators enable it.
 		SettingKeyGrokDefaultTextModel:           "grok-4.5",
-		SettingKeyGrokCrossClientModelMapEnabled: "false",
+		SettingKeyGrokCrossClientModelMapEnabled: "true",
 		SettingKeyGrokDefaultBaseURLMode:         GrokDefaultBaseURLModeCLI,
 
 		// Available channels feature (default disabled; opt-in)
@@ -796,7 +796,9 @@ func (s *SettingService) parseSettings(settings map[string]string) *SystemSettin
 	if result.GrokDefaultTextModel == "" {
 		result.GrokDefaultTextModel = "grok-4.5"
 	}
-	result.GrokCrossClientModelMapEnabled = settings[SettingKeyGrokCrossClientModelMapEnabled] == "true"
+	// Default true (missing/empty → enabled) so Claude/Codex→Grok mapping keeps working.
+	// Operators can set false to disable silent cross-client rewrite.
+	result.GrokCrossClientModelMapEnabled = !isFalseSettingValue(settings[SettingKeyGrokCrossClientModelMapEnabled])
 	result.GrokDefaultBaseURLMode = normalizeGrokDefaultBaseURLMode(settings[SettingKeyGrokDefaultBaseURLMode])
 
 	// Available channels feature (default: disabled; strict true)
diff --git a/backend/migrations/218_group_audio_voice_pricing.sql b/backend/migrations/218_group_audio_voice_pricing.sql
index f96b1f168e..c1b8652265 100644
--- a/backend/migrations/218_group_audio_voice_pricing.sql
+++ b/backend/migrations/218_group_audio_voice_pricing.sql
@@ -1,5 +1,5 @@
 -- Grok Voice 显式定价：realtime / TTS / STT。
--- NULL 表示未配置（当前中继不强制计费；字段预留给分组配置与后续计费接线）。
+-- NULL = 使用代码默认单价；显式 0 = 免费；>0 = 分组覆盖价。
 ALTER TABLE groups ADD COLUMN IF NOT EXISTS audio_realtime_price_per_min DECIMAL(20,8);
 ALTER TABLE groups ADD COLUMN IF NOT EXISTS audio_tts_price_per_million_chars DECIMAL(20,8);
 ALTER TABLE groups ADD COLUMN IF NOT EXISTS audio_stt_price_per_hour DECIMAL(20,8);
diff --git a/backend/migrations/219_group_search_price_per_1k.sql b/backend/migrations/219_group_search_price_per_1k.sql
index 52b88a7e27..54b6ef81f4 100644
--- a/backend/migrations/219_group_search_price_per_1k.sql
+++ b/backend/migrations/219_group_search_price_per_1k.sql
@@ -1,2 +1,3 @@
 -- Grok / 通用搜索工具显式定价（per 1000 calls，USD）。
+-- NULL = 使用代码默认 $10/1k；显式 0 = 免费；>0 = 分组覆盖价。
 ALTER TABLE groups ADD COLUMN IF NOT EXISTS search_price_per_1k DECIMAL(20,8);
diff --git a/backend/migrations/220_clear_non_grok_video_generation_config.sql b/backend/migrations/220_clear_non_grok_video_generation_config.sql
index ed9791485a..05571d3709 100644
--- a/backend/migrations/220_clear_non_grok_video_generation_config.sql
+++ b/backend/migrations/220_clear_non_grok_video_generation_config.sql
@@ -16,6 +16,7 @@ SELECT id AS group_id,
        now() AS backed_up_at
 FROM groups
 WHERE platform IS DISTINCT FROM 'grok'
+  AND platform IS DISTINCT FROM 'composite'
   AND (
       video_price_480p IS NOT NULL
       OR video_price_720p IS NOT NULL
@@ -24,7 +25,7 @@ WHERE platform IS DISTINCT FROM 'grok'
   );
 
 COMMENT ON TABLE groups_video_price_backup_220 IS
-    '迁移 220 清空非 Grok 分组视频价前的快照。确认无需回滚后可安全 DROP；回滚方式：UPDATE groups g SET video_price_480p = b.video_price_480p, ... FROM groups_video_price_backup_220 b WHERE g.id = b.group_id';
+    '迁移 220 清空非 Grok/非 composite 分组视频价前的快照。composite 可能路由到 Grok 账号，予以保留。确认无需回滚后可安全 DROP；回滚方式：UPDATE groups g SET video_price_480p = b.video_price_480p, ... FROM groups_video_price_backup_220 b WHERE g.id = b.group_id';
 
 UPDATE groups
 SET video_price_480p = NULL,
@@ -32,6 +33,7 @@ SET video_price_480p = NULL,
     video_price_1080p = NULL,
     video_model_prices = NULL
 WHERE platform IS DISTINCT FROM 'grok'
+  AND platform IS DISTINCT FROM 'composite'
   AND (
       video_price_480p IS NOT NULL
       OR video_price_720p IS NOT NULL
diff --git a/deploy/config.example.yaml b/deploy/config.example.yaml
index eadf76b0aa..095c550993 100644
--- a/deploy/config.example.yaml
+++ b/deploy/config.example.yaml
@@ -444,15 +444,17 @@ gateway:
   # Enabled by default because free detection requires an explicit subscription_tier/plan_type of "free".
   # Stats/query failures fail open so DB issues do not block all Grok traffic.
   grok:
-    # Email/password authorization is hidden and hard-disabled. Use SSO cookie,
-    # browser OAuth, or refresh_token re-auth instead. The flag is retained for
-    # config compatibility only and is ignored by the server.
+    # Email/password OAuth is off by default and hidden in the admin UI.
+    # Setting true enables POST /admin/grok/oauth/password (password → SSO → Build OAuth).
+    # Prefer SSO cookie, browser OAuth, or refresh_token re-auth in production.
     password_auth_enabled: false
     free_quota_soft_gate_enabled: true
     free_quota_token_limit: 500000
     free_quota_soft_gate_percent: 95
     free_quota_window_hours: 24
-    free_quota_stats_cache_seconds: 5
+    # Stats cache for free-tier soft gate. Hot path never waits on DB: misses
+    # fail open and refresh in the background. Prefer >= 60s in production.
+    free_quota_stats_cache_seconds: 60
   # HTTP upstream connection pool settings (HTTP/2 + multi-proxy scenario defaults)
   # HTTP 上游连接池配置（HTTP/2 + 多代理场景默认值）
   # Max idle connections across all hosts