diff --git a/apps/api/internal/clients/clients_test.go b/apps/api/internal/clients/clients_test.go
index e883ba6..b94226a 100644
--- a/apps/api/internal/clients/clients_test.go
+++ b/apps/api/internal/clients/clients_test.go
@@ -110,6 +110,7 @@ func TestOpenAIClientChatContract(t *testing.T) {
 			t.Fatalf("decode request: %v", err)
 		}
 		gotModel, _ = body["model"].(string)
+		time.Sleep(25 * time.Millisecond)
 		_ = json.NewEncoder(w).Encode(map[string]any{
 			"id":     "chatcmpl-test",
 			"object": "chat.completion",
@@ -145,6 +146,9 @@ func TestOpenAIClientChatContract(t *testing.T) {
 	if response.RequestID != "req-chat-test" || response.ResponseStartedAt.IsZero() || response.ResponseFinishedAt.IsZero() {
 		t.Fatalf("response metadata was not captured: %+v", response)
 	}
+	if response.ResponseDurationMS < 20 {
+		t.Fatalf("response duration should include upstream latency, got %dms", response.ResponseDurationMS)
+	}
 }
 
 func TestOpenAIClientChatStreamContract(t *testing.T) {
diff --git a/apps/api/internal/clients/gemini.go b/apps/api/internal/clients/gemini.go
index dc0ac50..6a8f6ed 100644
--- a/apps/api/internal/clients/gemini.go
+++ b/apps/api/internal/clients/gemini.go
@@ -27,11 +27,11 @@ func (c GeminiClient) Run(ctx context.Context, request Request) (Response, error
 		return Response{}, err
 	}
 	req.Header.Set("Content-Type", "application/json")
+	responseStartedAt := time.Now()
 	resp, err := httpClient(request.HTTPClient, c.HTTPClient).Do(req)
 	if err != nil {
 		return Response{}, &ClientError{Code: "network", Message: err.Error(), Retryable: true}
 	}
-	responseStartedAt := time.Now()
 	requestID := requestIDFromHTTPResponse(resp)
 	result, err := decodeHTTPResponse(resp)
 	responseFinishedAt := time.Now()
diff --git a/apps/api/internal/clients/openai.go b/apps/api/internal/clients/openai.go
index eaf54b4..8a579e1 100644
--- a/apps/api/internal/clients/openai.go
+++ b/apps/api/internal/clients/openai.go
@@ -33,11 +33,11 @@ func (c OpenAIClient) Run(ctx context.Context, request Request) (Response, error
 	}
 	req.Header.Set("Content-Type", "application/json")
 	req.Header.Set("Authorization", "Bearer "+apiKey)
+	responseStartedAt := time.Now()
 	resp, err := httpClient(request.HTTPClient, c.HTTPClient).Do(req)
 	if err != nil {
 		return Response{}, &ClientError{Code: "network", Message: err.Error(), Retryable: true}
 	}
-	responseStartedAt := time.Now()
 	requestID := requestIDFromHTTPResponse(resp)
 	result, err := decodeOpenAIResponse(resp, stream, request.StreamDelta)
 	responseFinishedAt := time.Now()
diff --git a/apps/api/internal/clients/types.go b/apps/api/internal/clients/types.go
index 778ae92..8d88793 100644
--- a/apps/api/internal/clients/types.go
+++ b/apps/api/internal/clients/types.go
@@ -146,5 +146,8 @@ func responseDurationMS(startedAt time.Time, finishedAt time.Time) int64 {
 	if duration < 0 {
 		return 0
 	}
+	if duration == 0 && finishedAt.After(startedAt) {
+		return 1
+	}
 	return duration
 }
diff --git a/apps/api/internal/clients/volces.go b/apps/api/internal/clients/volces.go
index 60ec856..b03c4d3 100644
--- a/apps/api/internal/clients/volces.go
+++ b/apps/api/internal/clients/volces.go
@@ -45,11 +45,11 @@ func (c VolcesClient) runImage(ctx context.Context, request Request, apiKey stri
 	req.Header.Set("Content-Type", "application/json")
 	req.Header.Set("Authorization", "Bearer "+apiKey)
 
+	responseStartedAt := time.Now()
 	resp, err := httpClient(request.HTTPClient, c.HTTPClient).Do(req)
 	if err != nil {
 		return Response{}, &ClientError{Code: "network", Message: err.Error(), Retryable: true}
 	}
-	responseStartedAt := time.Now()
 	requestID := requestIDFromHTTPResponse(resp)
 	result, err := decodeHTTPResponse(resp)
 	responseFinishedAt := time.Now()
diff --git a/apps/web/src/pages/WorkspacePage.tsx b/apps/web/src/pages/WorkspacePage.tsx
index e7e8eef..c7ff2c8 100644
--- a/apps/web/src/pages/WorkspacePage.tsx
+++ b/apps/web/src/pages/WorkspacePage.tsx
@@ -812,7 +812,7 @@ function TaskRecord(props: { task: GatewayTask; token: string; onCopyRequestId:
       <TableCell>{props.task.apiKeyName || props.task.apiKeyPrefix || props.task.apiKeyId || '-'}</TableCell>
       <TableCell className="taskRecordTokenCell">{tokenUsage}</TableCell>
       <TableCell>{chargeText}</TableCell>
-      <TableCell>{formatDuration(props.task.responseDurationMs)}</TableCell>
+      <TableCell>{formatDuration(taskDurationMs(props.task))}</TableCell>
       <TableCell>{formatDateTime(props.task.createdAt)}</TableCell>
       <TableCell>
         <Button type="button" variant="ghost" size="sm" className="taskRecordJsonButton" title={taskErrorText(props.task) || '查看原始 JSON'} onClick={() => props.onOpenJson(props.task)}>
@@ -1029,7 +1029,7 @@ function taskAttemptMeta(attempt: NonNullable<GatewayTask['attempts']>[number])
     attempt.providerModelName || attempt.modelName || attempt.modelAlias,
     attempt.requestId ? `RequestID ${attempt.requestId}` : '',
     statusCode ? `状态码 ${statusCode}` : '',
-    attempt.responseDurationMs ? formatDuration(attempt.responseDurationMs) : '',
+    formatDuration(attemptDurationMs(attempt)),
   ].filter(Boolean);
   return values.join(' · ') || attempt.clientId || '-';
 }
@@ -1355,10 +1355,41 @@ function tokenValue(value: unknown) {
   return Number.isFinite(numericValue) ? numericValue : null;
 }
 
+function taskDurationMs(task: GatewayTask) {
+  return (
+    positiveDurationMs(task.responseDurationMs) ??
+    elapsedDurationMs(task.responseStartedAt, task.responseFinishedAt) ??
+    elapsedDurationMs(task.createdAt, task.finishedAt)
+  );
+}
+
+function attemptDurationMs(attempt: NonNullable<GatewayTask['attempts']>[number]) {
+  return (
+    positiveDurationMs(attempt.responseDurationMs) ??
+    elapsedDurationMs(attempt.responseStartedAt, attempt.responseFinishedAt) ??
+    elapsedDurationMs(attempt.startedAt, attempt.finishedAt)
+  );
+}
+
+function positiveDurationMs(value?: number) {
+  if (value === undefined || value === null) return undefined;
+  const numericValue = Number(value);
+  return Number.isFinite(numericValue) && numericValue > 0 ? numericValue : undefined;
+}
+
+function elapsedDurationMs(start?: string, end?: string) {
+  if (!start || !end) return undefined;
+  const startedAt = new Date(start).getTime();
+  const finishedAt = new Date(end).getTime();
+  if (!Number.isFinite(startedAt) || !Number.isFinite(finishedAt)) return undefined;
+  const elapsed = finishedAt - startedAt;
+  return elapsed > 0 ? Math.max(1, Math.round(elapsed)) : undefined;
+}
+
 function formatDuration(value?: number) {
   if (value === undefined || value === null) return '-';
   const milliseconds = Math.max(0, Math.round(value));
-  if (milliseconds === 0) return '0秒';
+  if (milliseconds === 0) return '-';
   if (milliseconds < 1000) return `${milliseconds}毫秒`;
   const totalSeconds = Math.round(milliseconds / 1000);
   const hours = Math.floor(totalSeconds / 3600);