diff --git a/README.md b/README.md
index 14d0f89..79b5eac 100644
--- a/README.md
+++ b/README.md
@@ -553,7 +553,7 @@ bash scripts/start-webui.sh
 ```bash
 export OPENAI_API_KEY="..."
 export OPENAI_BASE_URL="http://model.mify.ai.srv/v1"
-export OPENAI_MODEL="xiaomi/mimo-v2-flash"
+export OPENAI_MODEL="tongyi/deepseek-v4-pro"
 ```
 
 停止本地 Web UI：
diff --git a/scripts/deploy-ubuntu.sh b/scripts/deploy-ubuntu.sh
index 3e875d2..284ba4f 100755
--- a/scripts/deploy-ubuntu.sh
+++ b/scripts/deploy-ubuntu.sh
@@ -212,7 +212,7 @@ ensure_env_file() {
 	prompt_value api_key "请输入 OPENAI_API_KEY: " "" 1
 	[[ -n "${api_key}" ]] || fail "OPENAI_API_KEY 不能为空。"
 	prompt_value base_url "请输入 OPENAI_BASE_URL" "http://model.mify.ai.srv/v1"
-	prompt_value model "请输入 OPENAI_MODEL" "xiaomi/mimo-v2-flash"
+	prompt_value model "请输入 OPENAI_MODEL" "tongyi/deepseek-v4-pro"
 	configure_instance_names
 	prompt_value backend_host "请输入后端监听地址" "127.0.0.1"
 	prompt_value backend_port "请输入后端端口" "8765"
diff --git a/scripts/start-backend.sh b/scripts/start-backend.sh
index c8a4cc1..9222018 100755
--- a/scripts/start-backend.sh
+++ b/scripts/start-backend.sh
@@ -18,7 +18,7 @@ fi
 
 export OPENAI_API_KEY
 export OPENAI_BASE_URL="${OPENAI_BASE_URL:-http://model.mify.ai.srv/v1}"
-export OPENAI_MODEL="${OPENAI_MODEL:-xiaomi/mimo-v2-flash}"
+export OPENAI_MODEL="${OPENAI_MODEL:-tongyi/deepseek-v4-pro}"
 export OPENAI_TIMEOUT_SECONDS="${OPENAI_TIMEOUT_SECONDS:-3600}"
 
 # 后端也会调用 Node 生态工具，例如 feishu-mcp-pro。systemd 不读取交互式
diff --git a/scripts/start-webui.sh b/scripts/start-webui.sh
index 5ca425e..cc9f9c2 100755
--- a/scripts/start-webui.sh
+++ b/scripts/start-webui.sh
@@ -140,7 +140,7 @@ if [[ -z "${OPENAI_API_KEY:-}" ]]; then
 fi
 export OPENAI_API_KEY="${OPENAI_API_KEY:-}"
 export OPENAI_BASE_URL="${OPENAI_BASE_URL:-http://model.mify.ai.srv/v1}"
-export OPENAI_MODEL="${OPENAI_MODEL:-xiaomi/mimo-v2-flash}"
+export OPENAI_MODEL="${OPENAI_MODEL:-tongyi/deepseek-v4-pro}"
 export OPENAI_TIMEOUT_SECONDS="${OPENAI_TIMEOUT_SECONDS:-3600}"
 
 BACKEND_LOG="${RUN_DIR}/webui-backend.log"