diff --git a/sidercall.py b/sidercall.py
index 8edd163..6f82de5 100644
--- a/sidercall.py
+++ b/sidercall.py
@@ -37,7 +37,7 @@ class SiderLLMSession:
         return full_text   
 
 class ClaudeSession:
-    def __init__(self, api_key, api_base, model="claude-opus", context_win=10000):
+    def __init__(self, api_key, api_base, model="claude-opus", context_win=9000):
         self.api_key, self.api_base, self.default_model, self.context_win = api_key, api_base.rstrip('/'), model, context_win
         self.raw_msgs, self.lock = [], threading.Lock()
     def _trim_messages(self, messages):
@@ -51,7 +51,7 @@ class ClaudeSession:
             else: break
         if current > self.context_win * 3.6: print(f'[DEBUG] {len(result)} contexts, whole length {current//4} tokens.')
         return result[::-1] or messages[-2:]
-    def raw_ask(self, messages, model=None, temperature=0.5, max_tokens=6144):
+    def raw_ask(self, messages, model=None, temperature=0.5, max_tokens=4096):
         model = model or self.default_model
         headers = {"x-api-key": self.api_key, "Content-Type": "application/json", "anthropic-version": "2023-06-01"}
         payload = {"model": model, "messages": messages, "temperature": temperature, "max_tokens": max_tokens, "stream": True}
@@ -100,6 +100,9 @@ class LLMSession:
         else: self.api_mode = "chat_completions"
 
     def _endpoint(self, path):
+         # 处理火山引擎API，它已经包含完整路径 
+        if 'ark.cn-beijing.volces.com' in self.api_base or 'ark.cn-shanghai.volces.com' in self.api_base:
+            return f"{self.api_base}/{path.lstrip('/')}"
         if self.api_base.endswith('/v1'): return f"{self.api_base}/{path.lstrip('/')}"
         if self.api_base.endswith('$'): return f"{self.api_base.rstrip('$')}/{path.lstrip('/')}"
         return f"{self.api_base}/v1/{path.lstrip('/')}"
@@ -538,4 +541,4 @@ if __name__ == "__main__":
     response = get_final(llmclient.chat(
         messages=[{"role": "user", "content": "<tool_result>10.176.45.12</tool_result>"}] 
     ))
-    print(response.content)
+    print(response.content)
\ No newline at end of file