diff --git a/ai/views/oj.py b/ai/views/oj.py
index f560b5b..60f7666 100644
--- a/ai/views/oj.py
+++ b/ai/views/oj.py
@@ -156,7 +156,7 @@ def stream_ai_response(client, system_prompt, user_prompt, on_complete=None):
     """SSE 流式响应生成器，on_complete(full_text) 在流结束时调用"""
     try:
         stream = client.chat.completions.create(
-            model="deepseek-chat",
+            model="deepseek-reasoner",
             messages=[
                 {"role": "system", "content": system_prompt},
                 {"role": "user", "content": user_prompt},
@@ -575,7 +575,7 @@ class AILoginSummaryAPI(APIView):
 
         try:
             completion = client.chat.completions.create(
-                model="deepseek-chat",
+                model="deepseek-reasoner",
                 messages=[
                     {"role": "system", "content": system_prompt},
                     {"role": "user", "content": user_prompt},
@@ -605,7 +605,7 @@ class AIAnalysisAPI(APIView):
             AIAnalysis.objects.create(
                 user=request.user,
                 provider="deepseek",
-                model="deepseek-chat",
+                model="deepseek-reasoner",
                 data={"details": details, "duration": duration},
                 system_prompt=system_prompt,
                 user_prompt="这段时间内的详细数据，每周或每月的数据。",
diff --git a/flowchart/tasks.py b/flowchart/tasks.py
index faf5346..4f0b7c4 100644
--- a/flowchart/tasks.py
+++ b/flowchart/tasks.py
@@ -52,7 +52,7 @@ def evaluate_flowchart_task(submission_id):
         client = get_ai_client()
         
         response = client.chat.completions.create(
-            model="deepseek-chat",
+            model="deepseek-reasoner",
             messages=[
                 {"role": "system", "content": system_prompt},
                 {"role": "user", "content": user_prompt}
@@ -73,7 +73,7 @@ def evaluate_flowchart_task(submission_id):
             submission.ai_suggestions = score_data.get('suggestions', '')
             submission.ai_criteria_details = score_data.get('criteria_details', {})
             submission.ai_provider = 'deepseek'
-            submission.ai_model = 'deepseek-chat'
+            submission.ai_model = 'deepseek-reasoner'
             submission.processing_time = processing_time
             submission.status = FlowchartSubmissionStatus.COMPLETED
             submission.evaluation_time = timezone.now()
diff --git a/problem/views/admin.py b/problem/views/admin.py
index 401fa35..17b3d74 100644
--- a/problem/views/admin.py
+++ b/problem/views/admin.py
@@ -495,7 +495,7 @@ class ProblemFlowchartAIGen(APIView):
         python_code = request.data.get("python", "")
         client = get_ai_client()
         response = client.chat.completions.create(
-            model="deepseek-chat",
+            model="deepseek-reasoner",
             messages=[
                 {
                     "role": "system",