diff --git a/backend/internal/service/openai_quota_reset_credits.go b/backend/internal/service/openai_quota_reset_credits.go
index 75756976db..9ff7e70f16 100644
--- a/backend/internal/service/openai_quota_reset_credits.go
+++ b/backend/internal/service/openai_quota_reset_credits.go
@@ -59,7 +59,7 @@ func parseOpenAIRateLimitResetCreditDetails(body []byte) (openAIRateLimitResetCr
 			payload.Data,
 		)
 		if err != nil {
-			return openAIRateLimitResetCreditDetails{}, err
+			return openAIRateLimitResetCreditDetails{AvailableCount: availableCount}, err
 		}
 	}
 
diff --git a/backend/internal/service/openai_quota_reset_credits_test.go b/backend/internal/service/openai_quota_reset_credits_test.go
index 5d994602e1..34f87f9a2f 100644
--- a/backend/internal/service/openai_quota_reset_credits_test.go
+++ b/backend/internal/service/openai_quota_reset_credits_test.go
@@ -82,6 +82,19 @@ func TestQueryUsageResetCreditCountPrecedence(t *testing.T) {
 			wantCount:   5,
 			wantCredits: 1,
 		},
+		{
+			name:        "valid detail count survives malformed authoritative list",
+			usageBody:   `{"rate_limit_reset_credits":{"available_count":7,"credits":[{"expires_at":"usage-expiry"}]}}`,
+			detailBody:  `{"available_count":2,"credits":"malformed"}`,
+			wantCount:   2,
+			wantCredits: 1,
+		},
+		{
+			name:       "valid detail count creates quota despite malformed authoritative list",
+			usageBody:  `{}`,
+			detailBody: `{"available_count":2,"credits":"malformed"}`,
+			wantCount:  2,
+		},
 		{
 			name:       "negative detail count without list preserves usage",
 			usageBody:  `{"rate_limit_reset_credits":{"available_count":4}}`,
diff --git a/backend/internal/service/openai_quota_service.go b/backend/internal/service/openai_quota_service.go
index 63ce173639..a94d5fe3f8 100644
--- a/backend/internal/service/openai_quota_service.go
+++ b/backend/internal/service/openai_quota_service.go
@@ -230,7 +230,9 @@ func (s *OpenAIQuotaService) queryResetCreditDetails(ctx context.Context, client
 	details, err := parseOpenAIRateLimitResetCreditDetails(resp.Bytes())
 	if err != nil {
 		slog.Warn("openai_quota_reset_credit_details_parse_failed", "account_id", accountID, "error", err)
-		return nil
+		if details.AvailableCount == nil {
+			return nil
+		}
 	}
 	if details.AvailableCount == nil && !details.CreditListPresent {
 		return nil