diff --git a/sundynix-dispatcher/internal/eino/orchestrator.go b/sundynix-dispatcher/internal/eino/orchestrator.go
index a3f0712..3a8bfcb 100644
--- a/sundynix-dispatcher/internal/eino/orchestrator.go
+++ b/sundynix-dispatcher/internal/eino/orchestrator.go
@@ -172,8 +172,18 @@ func (o *Orchestrator) emitUsage(t *contract.Task, b *harness.Budget) {
 	}
 	uid, _ := t.Meta[contract.MetaUserID].(string)
 	tid, _ := t.Meta[contract.MetaTenantID].(string)
+	// 记录本任务**实际所用模型**（语音任务=语音池，其余=工作池），让计费按真实模型定价，
+	// 别把语音快模型的账记到工作模型头上（否则 SaveUsageEvent 会拿激活 chat 模型兜底，错价）。
+	pool := o.pool
+	if meta(t, contract.MetaModelProfile) == contract.ModelProfileVoice && o.voicePool != nil && o.voicePool.Ready() {
+		pool = o.voicePool
+	}
+	model := ""
+	if mn, ok := pool.(interface{ ModelName() string }); ok {
+		model = mn.ModelName()
+	}
 	if err := o.usageSink.PublishUsage(&contract.UsageEvent{
-		TaskID: t.ID, UserID: uid, TenantID: tid, PromptTok: p, CompTok: c, TotalTok: total,
+		TaskID: t.ID, UserID: uid, TenantID: tid, Model: model, PromptTok: p, CompTok: c, TotalTok: total,
 		Exceeded: b.Exceeded(), TS: time.Now().UnixMilli(),
 	}); err != nil {
 		log.Printf("[usage] 回写用量失败 task=%s: %v", t.ID, err)
diff --git a/sundynix-gateway/sim_answer.wav b/sundynix-gateway/sim_answer.wav
index 40f0d15..326e983 100644
Binary files a/sundynix-gateway/sim_answer.wav and b/sundynix-gateway/sim_answer.wav differ
diff --git a/sundynix-gateway/sim_question.wav b/sundynix-gateway/sim_question.wav
index e31409b..cfa0c72 100644
Binary files a/sundynix-gateway/sim_question.wav and b/sundynix-gateway/sim_question.wav differ