diff --git a/gateway/scripts/chat_bridge.py b/gateway/scripts/chat_bridge.py
index 0a49051..603d486 100644
--- a/gateway/scripts/chat_bridge.py
+++ b/gateway/scripts/chat_bridge.py
@@ -61,10 +61,9 @@ _DEFAULT_MODELS = {
 def _build_chain() -> list[tuple[str, str, str]]:
     """Build (provider_key, base_url, model_name) in priority order.
 
-    优先用 volcengine（额度/免费）→ opencode-go-new（订阅）→ opencode-go（备用）。
-    deepseek（直连）作为最后兜底，额度不够时启用。
+    优先用 deepseek（直连，稳定）→ volcengine（代理→Go）→ opencode-go（备用）。
     """
-    allowed = ["volcengine", "opencode-go", "opencode-go-new"]
+    allowed = ["deepseek", "volcengine", "opencode-go", "opencode-go-new"]
     chain = []
     for key in allowed:
         prov = _PROVIDERS.get(key)