diff --git a/apps/api/src/config.ts b/apps/api/src/config.ts
index 018bd86..d300465 100644
--- a/apps/api/src/config.ts
+++ b/apps/api/src/config.ts
@@ -90,7 +90,7 @@ export const config = {
   /** 只用来写 ai_analysis.provider 这一列，换 provider 时和 AI_BASE_URL 一起改 */
   aiProvider: process.env.AI_PROVIDER ?? "deepseek",
   aiKey: process.env.AI_KEY ?? "",
-  aiModel: process.env.AI_MODEL ?? "deepseek-v4-flash",
+  aiModel: process.env.AI_MODEL ?? "deepseek-flash",
   ruffPath: process.env.RUFF_PATH ?? "ruff",
   clangFormatPath: process.env.CLANG_FORMAT_PATH ?? "clang-format",
 }
diff --git a/apps/api/src/flowchart/run.ts b/apps/api/src/flowchart/run.ts
index 06dcfd7..59874f4 100644
--- a/apps/api/src/flowchart/run.ts
+++ b/apps/api/src/flowchart/run.ts
@@ -67,7 +67,7 @@ export async function evaluateFlowchart(
       aiSuggestions: result.suggestions,
       aiCriteriaDetails: result.criteria,
       aiProvider: "deepseek",
-      aiModel: process.env.AI_MODEL ?? "deepseek-v4-flash",
+      aiModel: process.env.AI_MODEL ?? "deepseek-flash",
       processingTime: (performance.now() - started) / 1000,
       evaluationTime: new Date().toISOString(),
     }).where(eq(schema.flowchartSubmission.id, row.flowchart.id))