diff --git a/backend/internal/service/media_price_config.go b/backend/internal/service/media_price_config.go
index 0a583b6c72..de5cf437fb 100644
--- a/backend/internal/service/media_price_config.go
+++ b/backend/internal/service/media_price_config.go
@@ -20,14 +20,15 @@ func videoPriceConfigFromAPIKey(apiKey *APIKey) *VideoPriceConfig {
 		return nil
 	}
 	return &VideoPriceConfig{
-		Price480P:  apiKey.Group.VideoPrice480P,
-		Price720P:  apiKey.Group.VideoPrice720P,
-		Price1080P: apiKey.Group.VideoPrice1080P,
+		Price480P:   apiKey.Group.VideoPrice480P,
+		Price720P:   apiKey.Group.VideoPrice720P,
+		Price1080P:  apiKey.Group.VideoPrice1080P,
+		ModelPrices: apiKey.Group.VideoModelPrices,
 	}
 }
 
-func apiKeyHasConfiguredVideoPrice(apiKey *APIKey, resolution string) bool {
-	return apiKey != nil && apiKey.Group != nil && apiKey.Group.GetVideoPrice(resolution) != nil
+func apiKeyHasConfiguredVideoPrice(apiKey *APIKey, model, resolution string) bool {
+	return apiKey != nil && apiKey.Group != nil && apiKey.Group.GetVideoPriceForModel(model, resolution) != nil
 }
 
 func webSearchPricePerCallFromAPIKey(apiKey *APIKey) *float64 {
diff --git a/backend/internal/service/openai_gateway_record_usage_test.go b/backend/internal/service/openai_gateway_record_usage_test.go
index beb674474e..3bfa10e313 100644
--- a/backend/internal/service/openai_gateway_record_usage_test.go
+++ b/backend/internal/service/openai_gateway_record_usage_test.go
@@ -2218,6 +2218,53 @@ func TestOpenAIGatewayServiceRecordUsage_GroupVideoPriceOverridesChannelImagePri
 	require.Equal(t, string(BillingModeVideo), *usageRepo.lastLog.BillingMode)
 }
 
+func TestOpenAIGatewayServiceRecordUsage_GroupVideoModelPriceOverridesFlatAndChannelPrice(t *testing.T) {
+	groupID := int64(129)
+	channelPrice := 0.201
+	flatVideoPrice720P := 0.037
+	modelVideoPrice720P := 0.123
+	usageRepo := &openAIRecordUsageLogRepoStub{inserted: true}
+	svc := newOpenAIRecordUsageServiceForTest(usageRepo, &openAIRecordUsageUserRepoStub{}, &openAIRecordUsageSubRepoStub{}, nil)
+	svc.resolver = newOpenAIImageChannelPricingResolverForTest(t, groupID, "grok-imagine-video-1.5-preview", channelPrice)
+
+	err := svc.RecordUsage(context.Background(), &OpenAIRecordUsageInput{
+		Result: &OpenAIForwardResult{
+			RequestID:            "resp_grok_video_model_price",
+			Model:                "grok-imagine-video-1.5-preview",
+			BillingModel:         "grok-imagine-video-1.5-preview",
+			ImageCount:           1,
+			VideoCount:           1,
+			VideoResolution:      VideoBillingResolution720P,
+			VideoDurationSeconds: 2,
+			Duration:             time.Second,
+		},
+		APIKey: &APIKey{
+			ID:      10129,
+			GroupID: i64p(groupID),
+			Group: &Group{
+				ID:                   groupID,
+				Platform:             PlatformGrok,
+				RateMultiplier:       1,
+				VideoRateIndependent: true,
+				VideoRateMultiplier:  1,
+				VideoPrice720P:       &flatVideoPrice720P,
+				VideoModelPrices: map[string]map[string]float64{
+					VideoPriceFamilyGrokImagineVideo15: {VideoBillingResolution720P: modelVideoPrice720P},
+				},
+			},
+		},
+		User:    &User{ID: 20129},
+		Account: &Account{ID: 30129, Platform: PlatformGrok},
+	})
+
+	require.NoError(t, err)
+	require.NotNil(t, usageRepo.lastLog)
+	require.InDelta(t, modelVideoPrice720P*2, usageRepo.lastLog.TotalCost, 1e-12)
+	require.InDelta(t, modelVideoPrice720P*2, usageRepo.lastLog.ActualCost, 1e-12)
+	require.NotNil(t, usageRepo.lastLog.BillingMode)
+	require.Equal(t, string(BillingModeVideo), *usageRepo.lastLog.BillingMode)
+}
+
 func TestOpenAIGatewayServiceRecordUsage_HydratesGroupImagePriceWhenAuthSnapshotOmitsIt(t *testing.T) {
 	groupID := int64(130)
 	groupImagePrice2K := 0.021
diff --git a/backend/internal/service/openai_gateway_usage.go b/backend/internal/service/openai_gateway_usage.go
index 0725c34cf7..1297b17ed7 100644
--- a/backend/internal/service/openai_gateway_usage.go
+++ b/backend/internal/service/openai_gateway_usage.go
@@ -586,13 +586,13 @@ func (s *OpenAIGatewayService) calculateOpenAIVideoCost(
 	resolution := NormalizeVideoBillingResolutionOrDefault(result.VideoResolution)
 	durationSeconds := NormalizeVideoBillingDurationSecondsOrDefault(result.VideoDurationSeconds)
 	groupConfig := videoPriceConfigFromAPIKey(apiKey)
-	if apiKeyHasConfiguredVideoPrice(apiKey, resolution) {
+	if apiKeyHasConfiguredVideoPrice(apiKey, billingModel, resolution) {
 		return s.billingService.CalculateVideoCost(billingModel, resolution, videoCount, durationSeconds, groupConfig, multiplier)
 	}
 	if refreshed := s.apiKeyWithFreshGroupMediaPricing(ctx, apiKey); refreshed != apiKey {
 		apiKey = refreshed
 		groupConfig = videoPriceConfigFromAPIKey(apiKey)
-		if apiKeyHasConfiguredVideoPrice(apiKey, resolution) {
+		if apiKeyHasConfiguredVideoPrice(apiKey, billingModel, resolution) {
 			return s.billingService.CalculateVideoCost(billingModel, resolution, videoCount, durationSeconds, groupConfig, multiplier)
 		}
 	}