diff --git a/ai/migrations/0003_alter_aianalysis_model.py b/ai/migrations/0003_alter_aianalysis_model.py
new file mode 100644
index 0000000..439e42a
--- /dev/null
+++ b/ai/migrations/0003_alter_aianalysis_model.py
@@ -0,0 +1,18 @@
+# Generated by Django 6.0 on 2026-04-27 12:31
+
+from django.db import migrations, models
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        ('ai', '0002_aianalysis_model'),
+    ]
+
+    operations = [
+        migrations.AlterField(
+            model_name='aianalysis',
+            name='model',
+            field=models.TextField(default='deepseek-v4-flash'),
+        ),
+    ]
diff --git a/ai/models.py b/ai/models.py
index 4b170ca..c78802c 100644
--- a/ai/models.py
+++ b/ai/models.py
@@ -6,7 +6,7 @@ from account.models import User
 class AIAnalysis(models.Model):
     user = models.ForeignKey(User, on_delete=models.CASCADE)
     provider = models.TextField(default="deepseek")
-    model = models.TextField(default="deepseek-chat")
+    model = models.TextField(default="deepseek-v4-flash")
     data = models.JSONField()
     system_prompt = models.TextField()
     user_prompt = models.TextField()
diff --git a/flowchart/migrations/0002_alter_flowchartsubmission_ai_model.py b/flowchart/migrations/0002_alter_flowchartsubmission_ai_model.py
new file mode 100644
index 0000000..3e07b50
--- /dev/null
+++ b/flowchart/migrations/0002_alter_flowchartsubmission_ai_model.py
@@ -0,0 +1,18 @@
+# Generated by Django 6.0 on 2026-04-27 12:31
+
+from django.db import migrations, models
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        ('flowchart', '0001_initial'),
+    ]
+
+    operations = [
+        migrations.AlterField(
+            model_name='flowchartsubmission',
+            name='ai_model',
+            field=models.CharField(default='deepseek-v4-flash', max_length=50),
+        ),
+    ]
diff --git a/flowchart/models.py b/flowchart/models.py
index 514d47d..18ff263 100644
--- a/flowchart/models.py
+++ b/flowchart/models.py
@@ -37,7 +37,7 @@ class FlowchartSubmission(models.Model):
     
     # 处理信息
     ai_provider = models.CharField(max_length=50, default='deepseek')
-    ai_model = models.CharField(max_length=50, default='deepseek-chat')
+    ai_model = models.CharField(max_length=50, default='deepseek-v4-flash')
     processing_time = models.FloatField(null=True, blank=True)  # AI处理耗时(秒)
     evaluation_time = models.DateTimeField(null=True, blank=True) # 评分完成时间