diff --git a/.github/workflows/pr-agent.yml b/.github/workflows/pr-agent.yml
index 272cacaa..fa880abf 100644
--- a/.github/workflows/pr-agent.yml
+++ b/.github/workflows/pr-agent.yml
@@ -35,7 +35,7 @@ jobs:
 
           # 模型配置
           config.model: "openai/deepseek-v4-pro"
-          config.fallback_models: '["openai/deepseek-v4-pro"]'
+          config.fallback_models: '["openai/gpt-5.4-mini"]'
           config.custom_model_max_tokens: "1048576"
 
           # 自动执行配置