diff --git a/packages/services/conversation-service/src/infrastructure/agents/coordinator/agent-loop.ts b/packages/services/conversation-service/src/infrastructure/agents/coordinator/agent-loop.ts
index 3007660..c9c2ba6 100644
--- a/packages/services/conversation-service/src/infrastructure/agents/coordinator/agent-loop.ts
+++ b/packages/services/conversation-service/src/infrastructure/agents/coordinator/agent-loop.ts
@@ -153,7 +153,7 @@ export async function* agentLoop(
   for (let attempt = 0; attempt <= MAX_RETRIES; attempt++) {
     try {
       stream = anthropicClient.messages.stream({
-        model: 'claude-sonnet-4-20250514',
+        model: 'claude-sonnet-4-5-20250929',
         system: systemPrompt,
         messages: messages as any,
         tools: getToolsForClaudeAPI(additionalTools) as any,
diff --git a/packages/services/conversation-service/src/infrastructure/agents/types/agent.types.ts b/packages/services/conversation-service/src/infrastructure/agents/types/agent.types.ts
index 8705287..602e8fc 100644
--- a/packages/services/conversation-service/src/infrastructure/agents/types/agent.types.ts
+++ b/packages/services/conversation-service/src/infrastructure/agents/types/agent.types.ts
@@ -18,7 +18,7 @@ export enum SpecialistAgentType {
 }
 
 /** Agent 模型选择 */
-export type AgentModel = 'claude-sonnet-4-20250514' | 'claude-haiku-4-5-20251001';
+export type AgentModel = 'claude-sonnet-4-5-20250929' | 'claude-sonnet-4-20250514' | 'claude-haiku-4-5-20251001';
 
 /** Agent 配置 */
 export interface AgentConfig {