diff --git a/src/renderer/src/aiCore/index_new.ts b/src/renderer/src/aiCore/index_new.ts
index b281dd1a52..8da7448ceb 100644
--- a/src/renderer/src/aiCore/index_new.ts
+++ b/src/renderer/src/aiCore/index_new.ts
@@ -11,6 +11,7 @@ import { createExecutor, generateImage } from '@cherrystudio/ai-core'
 import { createAndRegisterProvider } from '@cherrystudio/ai-core/provider'
 import { loggerService } from '@logger'
 import { isNotSupportedImageSizeModel } from '@renderer/config/models'
+import { getEnableDeveloperMode } from '@renderer/hooks/useSettings'
 import { addSpan, endSpan } from '@renderer/services/SpanManagerService'
 import { StartSpanParams } from '@renderer/trace/types/ModelSpanEntity'
 import type { Assistant, GenerateImageParams, Model, Provider } from '@renderer/types'
@@ -52,6 +53,28 @@ export default class ModernAiProvider {
       topicId?: string
       callType: string
     }
+  ) {
+    if (config.topicId && getEnableDeveloperMode()) {
+      // TypeScript类型窄化：确保topicId是string类型
+      const traceConfig = {
+        ...config,
+        topicId: config.topicId
+      }
+      return await this._completionsForTrace(modelId, params, traceConfig)
+    } else {
+      return await this._completions(modelId, params, config)
+    }
+  }
+
+  private async _completions(
+    modelId: string,
+    params: StreamTextParams,
+    config: AiSdkMiddlewareConfig & {
+      assistant: Assistant
+      // topicId for tracing
+      topicId?: string
+      callType: string
+    }
   ): Promise<CompletionsResult> {
     // 初始化 provider 到全局管理器
     try {
@@ -79,7 +102,7 @@ export default class ModernAiProvider {
    * 带trace支持的completions方法
    * 类似于legacy的completionsForTrace，确保AI SDK spans在正确的trace上下文中
    */
-  public async completionsForTrace(
+  private async _completionsForTrace(
     modelId: string,
     params: StreamTextParams,
     config: AiSdkMiddlewareConfig & {
@@ -114,7 +137,7 @@ export default class ModernAiProvider {
         modelId,
         traceName
       })
-      return await this.completions(modelId, params, config)
+      return await this._completions(modelId, params, config)
     }
 
     try {
@@ -126,7 +149,7 @@ export default class ModernAiProvider {
         parentSpanCreated: true
       })
 
-      const result = await this.completions(modelId, params, config)
+      const result = await this._completions(modelId, params, config)
 
       logger.info('Completions finished, ending parent span', {
         spanId: span.spanContext().spanId,
@@ -172,7 +195,6 @@ export default class ModernAiProvider {
     params: StreamTextParams,
     config: AiSdkMiddlewareConfig & {
       assistant: Assistant
-      // topicId for tracing
       topicId?: string
       callType: string
     }
diff --git a/src/renderer/src/services/ApiService.ts b/src/renderer/src/services/ApiService.ts
index 9c11fa230c..705b17804b 100644
--- a/src/renderer/src/services/ApiService.ts
+++ b/src/renderer/src/services/ApiService.ts
@@ -10,7 +10,6 @@ import type { StreamTextParams } from '@renderer/aiCore/types'
 import { isDedicatedImageGenerationModel, isEmbeddingModel, isQwenMTModel } from '@renderer/config/models'
 import { LANG_DETECT_PROMPT } from '@renderer/config/prompts'
 import { getStoreSetting } from '@renderer/hooks/useSettings'
-import { getEnableDeveloperMode } from '@renderer/hooks/useSettings'
 import i18n from '@renderer/i18n'
 import store from '@renderer/store'
 import { Assistant, MCPServer, MCPTool, Model, Provider } from '@renderer/types'
@@ -138,23 +137,12 @@ export async function fetchChatCompletion({
 
   // --- Call AI Completions ---
   onChunkReceived({ type: ChunkType.LLM_RESPONSE_CREATED })
-  const enableDeveloperMode = getEnableDeveloperMode()
-  // 在 AI SDK 调用时设置正确的 OpenTelemetry 上下文
-  if (topicId && enableDeveloperMode) {
-    // 使用带trace支持的completions方法，它会自动创建子span并关联到父span
-    await AI.completionsForTrace(modelId, aiSdkParams, {
-      ...middlewareConfig,
-      assistant,
-      topicId,
-      callType: 'chat'
-    })
-  } else {
-    await AI.completions(modelId, aiSdkParams, {
-      ...middlewareConfig,
-      assistant,
-      callType: 'chat'
-    })
-  }
+  await AI.completions(modelId, aiSdkParams, {
+    ...middlewareConfig,
+    assistant,
+    topicId,
+    callType: 'chat'
+  })
 }
 
 interface FetchLanguageDetectionProps {
@@ -311,7 +299,7 @@ export async function fetchMessagesSummary({ messages, assistant }: { messages:
       await appendTrace({ topicId, traceId: messageWithTrace.traceId, model })
     }
 
-    const { getText } = await AI.completionsForTrace(model.id, llmMessages, {
+    const { getText } = await AI.completions(model.id, llmMessages, {
       ...middlewareConfig,
       assistant: summaryAssistant,
       topicId,