fix: 长上下文默认保持开启，并与 OpenAI 账号开关取交集

迁移默认 false 会让存量分组静默丢掉 ≥200k 阶梯与渠道多档价。
OpenAI 路径传入 Group 后，账号级 openai_long_context_billing_enabled 被顶掉。

- 列默认 TRUE，并对存量行回填
- 分组价卡不再手填 token 区间，勾选走官方/预设阶梯
- 分组开关与账号开关 AND；价卡 JSON 损坏时打 warn

backend/ent/migrate/schema.go

@@ -934,7 +934,7 @@ var (
 		{Name: "audio_realtime_price_per_min", Type: field.TypeFloat64, Nullable: true, SchemaType: map[string]string{"postgres": "decimal(20,8)"}},
 		{Name: "audio_tts_price_per_million_chars", Type: field.TypeFloat64, Nullable: true, SchemaType: map[string]string{"postgres": "decimal(20,8)"}},
 		{Name: "audio_stt_price_per_hour", Type: field.TypeFloat64, Nullable: true, SchemaType: map[string]string{"postgres": "decimal(20,8)"}},
-		{Name: "long_context_pricing_enabled", Type: field.TypeBool, Default: false},
+		{Name: "long_context_pricing_enabled", Type: field.TypeBool, Default: true},
 		{Name: "model_pricing", Type: field.TypeJSON, Nullable: true, SchemaType: map[string]string{"postgres": "jsonb"}},
 		{Name: "claude_code_only", Type: field.TypeBool, Default: false},
 		{Name: "fallback_group_id", Type: field.TypeInt64, Nullable: true},

backend/ent/schema/group.go

@@ -188,8 +188,8 @@ func (Group) Fields() []ent.Field {
 			SchemaType(map[string]string{dialect.Postgres: "decimal(20,8)"}).
 			Comment("STT 每小时价格（USD）"),
 		field.Bool("long_context_pricing_enabled").
-			Default(false).
-			Comment("是否按上下文长度应用模型阶梯价格"),
+			Default(true).
+			Comment("是否按上下文长度应用模型阶梯价格；默认开启以保持官方/渠道长上下文价"),
 		field.JSON("model_pricing", json.RawMessage{}).
 			Optional().
 			SchemaType(map[string]string{dialect.Postgres: "jsonb"}).

backend/internal/repository/api_key_repo.go

@@ -6,6 +6,7 @@ import (
 	"encoding/json"
 	"errors"
 	"fmt"
+	"log/slog"
 	"strings"
 	"time"
 
@@ -951,7 +952,11 @@ func groupEntityToService(g *dbent.Group) *service.Group {
 	}
 	var modelPricing []service.ChannelModelPricing
 	if len(g.ModelPricing) > 0 {
-		_ = json.Unmarshal(g.ModelPricing, &modelPricing)
+		if err := json.Unmarshal(g.ModelPricing, &modelPricing); err != nil {
+			slog.Warn("group model_pricing unmarshal failed; falling back to channel/builtin pricing",
+				"group_id", g.ID, "error", err)
+			modelPricing = nil
+		}
 	}
 	return &service.Group{
 		ID:                              g.ID,

backend/internal/service/model_pricing_resolver.go

@@ -71,11 +71,15 @@ type PricingInput struct {
 func (r *ModelPricingResolver) Resolve(ctx context.Context, input PricingInput) *ResolvedPricing {
 	longContextPricingEnabled := input.Group == nil || input.Group.LongContextPricingEnabled
 	if groupPricing := matchGroupModelPricing(input.Group, input.Model); groupPricing != nil {
+		// Group token cards only override the first-tier / flat rates.
+		// Long-context ladders come from official presets, gated by the checkbox.
+		if groupPricing.BillingMode == "" || groupPricing.BillingMode == BillingModeToken {
+			stripped := groupPricing.Clone()
+			stripped.Intervals = nil
+			groupPricing = &stripped
+		}
 		resolved := r.resolveConfiguredPricing(groupPricing, input.Model, PricingSourceGroup)
 		resolved.longContextPricingEnabled = longContextPricingEnabled
-		if resolved.Mode == BillingModeToken && !longContextPricingEnabled {
-			r.applyFirstTokenTier(resolved, groupPricing)
-		}
 		return resolved
 	}
 
@@ -119,7 +123,7 @@ func (r *ModelPricingResolver) Resolve(ctx context.Context, input PricingInput)
 		if !longContextPricingEnabled {
 			r.applyFirstTokenTier(resolved, chPricing)
 		}
-	} else if input.GroupID != nil {
+	} else if input.GroupID != nil && r.channelService != nil {
 		r.applyChannelOverrides(ctx, *input.GroupID, input.Model, resolved)
 		if resolved.Source == PricingSourceChannel && !longContextPricingEnabled {
 			r.applyFirstTokenTier(resolved, resolved.channelPricing)

backend/internal/service/model_pricing_resolver_test.go

@@ -850,24 +850,35 @@ func TestResolve_GroupPricingOverridesChannel(t *testing.T) {
 	require.InDelta(t, 2e-6, resolved.BasePricing.OutputPricePerToken, 1e-12)
 }
 
-func TestResolve_GroupLongContextToggleControlsIntervals(t *testing.T) {
-	r := NewModelPricingResolver(nil, newTestBillingServiceForResolver())
+func TestResolve_GroupLongContextUsesPresetNotCustomIntervals(t *testing.T) {
+	bs := newTestBillingServiceForResolver()
+	bs.fallbackPrices["claude-sonnet-4"].LongContextInputThreshold = 200000
+	bs.fallbackPrices["claude-sonnet-4"].LongContextThresholdInclusive = true
+	bs.fallbackPrices["claude-sonnet-4"].LongContextInputMultiplier = 2
+	bs.fallbackPrices["claude-sonnet-4"].LongContextOutputMultiplier = 2
+	r := NewModelPricingResolver(nil, bs)
 	group := &Group{ID: 100, ModelPricing: []ChannelModelPricing{{
 		Models: []string{"claude-sonnet-4"}, BillingMode: BillingModeToken,
+		InputPrice: testPtrFloat64(1e-6), OutputPrice: testPtrFloat64(2e-6),
 		Intervals: []PricingInterval{
-			{MinTokens: 0, MaxTokens: testPtrInt(200000), InputPrice: testPtrFloat64(1e-6)},
-			{MinTokens: 200000, InputPrice: testPtrFloat64(2e-6)},
+			{MinTokens: 0, MaxTokens: testPtrInt(200000), InputPrice: testPtrFloat64(9e-6)},
+			{MinTokens: 200000, InputPrice: testPtrFloat64(18e-6)},
 		},
 	}}}
 
 	resolved := r.Resolve(context.Background(), PricingInput{Model: "claude-sonnet-4", Group: group})
-	require.Empty(t, resolved.Intervals)
+	require.False(t, resolved.longContextPricingEnabled)
+	require.Empty(t, resolved.Intervals, "group token intervals are not a user-facing long-context ladder")
 	require.InDelta(t, 1e-6, r.GetIntervalPricing(resolved, 300000).InputPricePerToken, 1e-12)
+	require.Equal(t, 200000, resolved.BasePricing.LongContextInputThreshold)
 
 	group.LongContextPricingEnabled = true
 	resolved = r.Resolve(context.Background(), PricingInput{Model: "claude-sonnet-4", Group: group})
-	require.Len(t, resolved.Intervals, 2)
-	require.InDelta(t, 2e-6, r.GetIntervalPricing(resolved, 300000).InputPricePerToken, 1e-12)
+	require.True(t, resolved.longContextPricingEnabled)
+	require.Empty(t, resolved.Intervals)
+	require.InDelta(t, 1e-6, r.GetIntervalPricing(resolved, 300000).InputPricePerToken, 1e-12)
+	require.Equal(t, 200000, resolved.BasePricing.LongContextInputThreshold)
+	require.InDelta(t, 2.0, resolved.BasePricing.LongContextInputMultiplier, 1e-12)
 }
 
 func TestCalculateCostUnified_UsesContinuousMediaUnits(t *testing.T) {

backend/internal/service/openai_gateway_record_usage_test.go

@@ -256,6 +256,17 @@ func newOpenAIRecordUsageServiceForTest(usageRepo UsageLogRepository, userRepo U
 	return svc
 }
 
+func openAIRecordUsageAPIKeyWithGroup(svc *OpenAIGatewayService, id int64, groupLongContext bool) *APIKey {
+	svc.resolver = NewModelPricingResolver(nil, svc.billingService)
+	return &APIKey{
+		ID: id,
+		Group: &Group{
+			ID:                        1,
+			LongContextPricingEnabled: groupLongContext,
+		},
+	}
+}
+
 func newOpenAIRecordUsageServiceWithBillingRepoForTest(usageRepo UsageLogRepository, billingRepo UsageBillingRepository, userRepo UserRepository, subRepo UserSubscriptionRepository, rateRepo UserGroupRateRepository) *OpenAIGatewayService {
 	svc := newOpenAIRecordUsageServiceForTest(usageRepo, userRepo, subRepo, rateRepo)
 	svc.usageBillingRepo = billingRepo
@@ -1088,7 +1099,7 @@ func TestOpenAIGatewayServiceRecordUsage_Gpt54LongContextBillingDisabledByDefaul
 			Model:    "gpt-5.4-2026-03-05",
 			Duration: time.Second,
 		},
-		APIKey:  &APIKey{ID: 1014},
+		APIKey:  openAIRecordUsageAPIKeyWithGroup(svc, 1014, true),
 		User:    &User{ID: 2014},
 		Account: &Account{ID: 3014, Platform: PlatformOpenAI},
 	})
@@ -1122,7 +1133,7 @@ func TestOpenAIGatewayServiceRecordUsage_Gpt54LongContextBillingEnabledPerAccoun
 			Model:    "gpt-5.4-2026-03-05",
 			Duration: time.Second,
 		},
-		APIKey: &APIKey{ID: 1015},
+		APIKey: openAIRecordUsageAPIKeyWithGroup(svc, 1015, true),
 		User:   &User{ID: 2015},
 		Account: &Account{
 			ID:       3015,
@@ -1143,6 +1154,62 @@ func TestOpenAIGatewayServiceRecordUsage_Gpt54LongContextBillingEnabledPerAccoun
 	require.True(t, usageRepo.lastLog.LongContextBillingApplied)
 }
 
+func TestOpenAIGatewayServiceRecordUsage_GroupAndAccountLongContextMustBothAllow(t *testing.T) {
+	tokens := OpenAIUsage{InputTokens: 300000, OutputTokens: 2000}
+	baseInput := 300000 * 2.5e-6
+	baseOutput := 2000 * 15e-6
+
+	t.Run("group on account off", func(t *testing.T) {
+		usageRepo := &openAIRecordUsageLogRepoStub{inserted: true}
+		svc := newOpenAIRecordUsageServiceForTest(usageRepo, &openAIRecordUsageUserRepoStub{}, &openAIRecordUsageSubRepoStub{}, nil)
+		err := svc.RecordUsage(context.Background(), &OpenAIRecordUsageInput{
+			Result:  &OpenAIForwardResult{RequestID: "resp_and_off", Usage: tokens, Model: "gpt-5.4-2026-03-05", Duration: time.Second},
+			APIKey:  openAIRecordUsageAPIKeyWithGroup(svc, 1020, true),
+			User:    &User{ID: 2020},
+			Account: &Account{ID: 3020, Platform: PlatformOpenAI},
+		})
+		require.NoError(t, err)
+		require.False(t, usageRepo.lastLog.LongContextBillingApplied)
+		require.InDelta(t, baseInput, usageRepo.lastLog.InputCost, 1e-10)
+		require.InDelta(t, baseOutput, usageRepo.lastLog.OutputCost, 1e-10)
+	})
+
+	t.Run("group off account on", func(t *testing.T) {
+		usageRepo := &openAIRecordUsageLogRepoStub{inserted: true}
+		svc := newOpenAIRecordUsageServiceForTest(usageRepo, &openAIRecordUsageUserRepoStub{}, &openAIRecordUsageSubRepoStub{}, nil)
+		err := svc.RecordUsage(context.Background(), &OpenAIRecordUsageInput{
+			Result: &OpenAIForwardResult{RequestID: "resp_and_group_off", Usage: tokens, Model: "gpt-5.4-2026-03-05", Duration: time.Second},
+			APIKey: openAIRecordUsageAPIKeyWithGroup(svc, 1021, false),
+			User:   &User{ID: 2021},
+			Account: &Account{
+				ID: 3021, Platform: PlatformOpenAI,
+				Extra: map[string]any{"openai_long_context_billing_enabled": true},
+			},
+		})
+		require.NoError(t, err)
+		require.False(t, usageRepo.lastLog.LongContextBillingApplied)
+		require.InDelta(t, baseInput, usageRepo.lastLog.InputCost, 1e-10)
+	})
+
+	t.Run("group on account on", func(t *testing.T) {
+		usageRepo := &openAIRecordUsageLogRepoStub{inserted: true}
+		svc := newOpenAIRecordUsageServiceForTest(usageRepo, &openAIRecordUsageUserRepoStub{}, &openAIRecordUsageSubRepoStub{}, nil)
+		err := svc.RecordUsage(context.Background(), &OpenAIRecordUsageInput{
+			Result: &OpenAIForwardResult{RequestID: "resp_and_on", Usage: tokens, Model: "gpt-5.4-2026-03-05", Duration: time.Second},
+			APIKey: openAIRecordUsageAPIKeyWithGroup(svc, 1022, true),
+			User:   &User{ID: 2022},
+			Account: &Account{
+				ID: 3022, Platform: PlatformOpenAI,
+				Extra: map[string]any{"openai_long_context_billing_enabled": true},
+			},
+		})
+		require.NoError(t, err)
+		require.True(t, usageRepo.lastLog.LongContextBillingApplied)
+		require.InDelta(t, baseInput*2, usageRepo.lastLog.InputCost, 1e-10)
+		require.InDelta(t, baseOutput*1.5, usageRepo.lastLog.OutputCost, 1e-10)
+	})
+}
+
 func TestOpenAIGatewayServiceRecordUsage_SparkShadowUsesCurrentParentBillingSetting(t *testing.T) {
 	tests := []struct {
 		name          string
@@ -1177,7 +1244,7 @@ func TestOpenAIGatewayServiceRecordUsage_SparkShadowUsesCurrentParentBillingSett
 					Model:     "gpt-5.4-2026-03-05",
 					Duration:  time.Second,
 				},
-				APIKey: &APIKey{ID: 1016},
+				APIKey: openAIRecordUsageAPIKeyWithGroup(svc, 1016, true),
 				User:   &User{ID: 2016},
 				Account: &Account{
 					ID:              3016,

backend/internal/service/openai_gateway_usage.go

@@ -640,6 +640,7 @@ func (s *OpenAIGatewayService) calculateOpenAIRecordUsageTokenCost(
 			Ctx: ctx, Model: billingModel, GroupID: &gid, Group: apiKey.Group,
 			Tokens: tokens, RequestCount: 1, RateMultiplier: multiplier,
 			ServiceTier: serviceTier, Resolver: s.resolver,
+			LongContextBillingEnabled: &longContextBillingEnabled,
 		})
 	}
 	return s.billingService.calculateCostWithServiceTierPolicy(

backend/migrations/221_group_model_pricing.sql

@@ -1,8 +1,12 @@
 ALTER TABLE groups
-    ADD COLUMN IF NOT EXISTS long_context_pricing_enabled BOOLEAN NOT NULL DEFAULT FALSE,
+    ADD COLUMN IF NOT EXISTS long_context_pricing_enabled BOOLEAN NOT NULL DEFAULT TRUE,
     ADD COLUMN IF NOT EXISTS model_pricing JSONB;
 
+UPDATE groups
+SET long_context_pricing_enabled = TRUE
+WHERE long_context_pricing_enabled IS DISTINCT FROM TRUE;
+
 COMMENT ON COLUMN groups.long_context_pricing_enabled IS
-    'Whether token pricing selects long-context tiers; false uses the lowest tier only';
+    'Whether token pricing selects official/preset long-context tiers; default true preserves existing long-context billing';
 COMMENT ON COLUMN groups.model_pricing IS
     'Per-model group pricing overrides channel and built-in model pricing';

frontend/src/components/admin/channel/PricingEntryCard.vue

@@ -134,8 +134,8 @@
             </div>
           </div>
 
-          <!-- Token intervals -->
-          <div class="mt-3">
+          <!-- Token intervals (channel-only; group long-context uses official presets) -->
+          <div v-if="!hideTokenIntervals" class="mt-3">
             <div class="flex items-center justify-between">
               <label class="text-xs font-medium text-gray-500 dark:text-gray-400">
                 {{ t('admin.channels.form.intervals') }}
@@ -245,10 +245,13 @@ import channelsAPI from '@/api/admin/channels'
 
 const { t } = useI18n()
 
-const props = defineProps<{
+const props = withDefaults(defineProps<{
   entry: PricingFormEntry
   platform?: string
-}>()
+  hideTokenIntervals?: boolean
+}>(), {
+  hideTokenIntervals: false,
+})
 
 const emit = defineEmits<{
   update: [entry: PricingFormEntry]

frontend/src/i18n/locales/en/admin/overview.ts

@@ -1007,9 +1007,9 @@ export default {
       },
       modelPricing: {
         title: 'Per-model group pricing',
-        description: 'Overrides channel and built-in prices for matching models. Use per-request tiers such as realtime, tts, and stt for audio.',
+        description: 'Overrides channel and built-in prices for matching models. Long-context tiers come from official presets — do not enter custom intervals. Use per-request tiers such as realtime, tts, and stt for audio.',
         longContext: 'Enable long-context tier pricing',
-        longContextHint: 'When disabled, token models always use the lowest configured tier.',
+        longContextHint: 'When checked, official/preset long-context tiers apply. When unchecked, token models stay on the first-tier base rate.',
         add: 'Add model price'
       },
       voicePricing: {

frontend/src/i18n/locales/zh/admin/overview.ts

@@ -1004,9 +1004,9 @@ export default {
       },
       modelPricing: {
         title: '分组逐模型定价',
-        description: '匹配模型后覆盖渠道和内置价格。音频可用按次层级配置 realtime、tts、stt。',
+        description: '匹配模型后覆盖渠道和内置价格。长上下文阶梯沿用官方/预设价卡，无需再手填区间。音频可用按次层级配置 realtime、tts、stt。',
         longContext: '启用长上下文阶梯定价',
-        longContextHint: '关闭时，Token 模型始终只使用配置的最低档。',
+        longContextHint: '勾选后按官方/预设阶梯计费；关闭则始终按第一档基础价。',
         add: '添加模型价格'
       },
       voicePricing: {

frontend/src/views/admin/GroupsView.vue

@@ -1499,7 +1499,7 @@
             <span><span class="block text-sm text-gray-700 dark:text-gray-300">{{ t("admin.groups.modelPricing.longContext") }}</span><span class="block text-xs text-gray-500">{{ t("admin.groups.modelPricing.longContextHint") }}</span></span>
           </label>
           <div class="mt-3 space-y-2">
-            <PricingEntryCard v-for="(entry, index) in createForm.model_pricing" :key="index" :entry="entry" :platform="createForm.platform" @update="createForm.model_pricing[index] = $event" @remove="createForm.model_pricing.splice(index, 1)" />
+            <PricingEntryCard v-for="(entry, index) in createForm.model_pricing" :key="index" :entry="entry" :platform="createForm.platform" hide-token-intervals @update="createForm.model_pricing[index] = $event" @remove="createForm.model_pricing.splice(index, 1)" />
           </div>
         </div>
 
@@ -3221,7 +3221,7 @@
             <span><span class="block text-sm text-gray-700 dark:text-gray-300">{{ t("admin.groups.modelPricing.longContext") }}</span><span class="block text-xs text-gray-500">{{ t("admin.groups.modelPricing.longContextHint") }}</span></span>
           </label>
           <div class="mt-3 space-y-2">
-            <PricingEntryCard v-for="(entry, index) in editForm.model_pricing" :key="index" :entry="entry" :platform="editForm.platform" @update="editForm.model_pricing[index] = $event" @remove="editForm.model_pricing.splice(index, 1)" />
+            <PricingEntryCard v-for="(entry, index) in editForm.model_pricing" :key="index" :entry="entry" :platform="editForm.platform" hide-token-intervals @update="editForm.model_pricing[index] = $event" @remove="editForm.model_pricing.splice(index, 1)" />
           </div>
         </div>
 
@@ -4527,7 +4527,10 @@ const groupPricingToAPI = (
       image_input_price: mTokToPerToken(entry.image_input_price),
       image_output_price: mTokToPerToken(entry.image_output_price),
       per_request_price: toNullableNumber(entry.per_request_price),
-      intervals: formIntervalsToAPI(entry.intervals || []),
+      intervals:
+        entry.billing_mode === "token"
+          ? []
+          : formIntervalsToAPI(entry.intervals || []),
     }));
 
 const { t } = useI18n();
@@ -5013,7 +5016,7 @@ const createForm = reactive({
   daily_limit_usd: null as number | null,
   weekly_limit_usd: null as number | null,
   monthly_limit_usd: null as number | null,
-  long_context_pricing_enabled: false,
+  long_context_pricing_enabled: true,
   model_pricing: [] as PricingFormEntry[],
   // 图片生成计费配置
   allow_image_generation: false,
@@ -5374,7 +5377,7 @@ const editForm = reactive({
   daily_limit_usd: null as number | null,
   weekly_limit_usd: null as number | null,
   monthly_limit_usd: null as number | null,
-  long_context_pricing_enabled: false,
+  long_context_pricing_enabled: true,
   model_pricing: [] as PricingFormEntry[],
   // 图片生成计费配置
   allow_image_generation: false,
@@ -5848,7 +5851,7 @@ const closeCreateModal = () => {
   createForm.video_price_720p = null;
   createForm.video_price_1080p = null;
   createForm.video_model_prices = createVideoModelPricesForm();
-  createForm.long_context_pricing_enabled = false;
+  createForm.long_context_pricing_enabled = true;
   createForm.model_pricing = [];
   createForm.web_search_price_per_call = null;
   createForm.search_price_per_1k = null;
@@ -6076,7 +6079,7 @@ const handleEdit = async (group: AdminGroup) => {
   editForm.weekly_limit_usd = group.weekly_limit_usd;
   editForm.monthly_limit_usd = group.monthly_limit_usd;
   editForm.long_context_pricing_enabled =
-    group.long_context_pricing_enabled ?? false;
+    group.long_context_pricing_enabled ?? true;
   editForm.model_pricing = groupPricingFromAPI(group.model_pricing);
   editForm.allow_image_generation = group.allow_image_generation ?? false;
   editForm.allow_batch_image_generation =
@@ -6182,7 +6185,7 @@ const closeEditModal = () => {
   editForm.video_price_720p = null;
   editForm.video_price_1080p = null;
   editForm.video_model_prices = createVideoModelPricesForm();
-  editForm.long_context_pricing_enabled = false;
+  editForm.long_context_pricing_enabled = true;
   editForm.model_pricing = [];
   editForm.web_search_price_per_call = null;
   editForm.search_price_per_1k = null;