diff --git a/backend/src/main/java/com/imeeting/service/biz/impl/AiTaskServiceImpl.java b/backend/src/main/java/com/imeeting/service/biz/impl/AiTaskServiceImpl.java
index 9c718ff..efde5cb 100644
--- a/backend/src/main/java/com/imeeting/service/biz/impl/AiTaskServiceImpl.java
+++ b/backend/src/main/java/com/imeeting/service/biz/impl/AiTaskServiceImpl.java
@@ -1251,6 +1251,7 @@ public class AiTaskServiceImpl extends ServiceImpl<AiTaskMapper, AiTask> impleme
         Map<String, Object> req = new HashMap<>();
         req.put("model", llmModel.getModelCode());
         req.put("temperature", llmModel.getTemperature());
+        req.put("max_tokens", 30000);
         req.put("messages", List.of(
                 Map.of("role", "system", "content", meetingSummaryPromptAssembler.buildSystemMessage(taskRecord.getTaskConfig())),
           Map.of("role", "user", "content", meetingSummaryPromptAssembler.buildUserMessage(taskRecord.getTaskConfig(), meeting, summarySource, userPrompt))
diff --git a/backend/src/main/java/com/imeeting/service/biz/impl/MeetingTranscriptChapterServiceImpl.java b/backend/src/main/java/com/imeeting/service/biz/impl/MeetingTranscriptChapterServiceImpl.java
index a5a82df..4de2ffc 100644
--- a/backend/src/main/java/com/imeeting/service/biz/impl/MeetingTranscriptChapterServiceImpl.java
+++ b/backend/src/main/java/com/imeeting/service/biz/impl/MeetingTranscriptChapterServiceImpl.java
@@ -333,6 +333,7 @@ public class MeetingTranscriptChapterServiceImpl implements MeetingTranscriptCha
             Map<String, Object> requestBody = new LinkedHashMap<>();
             requestBody.put("model", llmModel.getModelCode());
             requestBody.put("temperature", llmModel.getTemperature());
+            requestBody.put("max_tokens", 30000);
             requestBody.put("messages", List.of(
               Map.of("role", "system", "content", renderChapterSystemPrompt()),
               Map.of("role", "user", "content", renderChapterUserPrompt(transcripts))
@@ -1011,6 +1012,7 @@ public class MeetingTranscriptChapterServiceImpl implements MeetingTranscriptCha
             Map<String, Object> requestBody = new LinkedHashMap<>();
             requestBody.put("model", llmModel.getModelCode());
             requestBody.put("temperature", llmModel.getTemperature());
+            requestBody.put("max_tokens", 30000);
             requestBody.put("messages", List.of(
               Map.of("role", "system", "content", renderChapterSystemPrompt()),
               Map.of("role", "user", "content", renderChapterUserPrompt(transcripts))