diff --git a/bot.py b/bot.py
index 99a665b0..f72a47e6 100644
--- a/bot.py
+++ b/bot.py
@@ -181,6 +181,8 @@ async def image(update, context):
             result += "当前 prompt 未能成功生成图片，可能因为版权，政治，色情，暴力，种族歧视等违反 OpenAI 的内容政策😣，换句话试试吧～"
         elif "server is busy" in str(e):
             result += "服务器繁忙，请稍后再试～"
+        elif "billing_hard_limit_reached" in str(e):
+            result += "当前账号余额不足～"
         else:
             result += f"`{e}`"
         await context.bot.edit_message_text(chat_id=chatid, message_id=start_messageid, text=result, parse_mode='MarkdownV2', disable_web_page_preview=True)
@@ -225,7 +227,7 @@ async def delete_message(update, context, messageid, delay=10):
     # ],
     [
         InlineKeyboardButton("claude-2", callback_data="claude-2"),
-        InlineKeyboardButton("claude-2-web", callback_data="claude-2-web"),
+        # InlineKeyboardButton("claude-2-web", callback_data="claude-2-web"),
     ],
     [
         InlineKeyboardButton("返回上一级", callback_data="返回上一级"),
@@ -571,4 +573,7 @@ async def post_init(application: Application) -> None:
         print("WEB_HOOK:", WEB_HOOK)
         application.run_webhook("127.0.0.1", PORT, webhook_url=WEB_HOOK)
     else:
-        application.run_polling()
\ No newline at end of file
+        # application.run_polling()
+        time_out = 600
+        application.run_polling(read_timeout=time_out, write_timeout=time_out)
+        # application.run_polling(read_timeout=time_out, write_timeout=time_out, pool_timeout=time_out, connect_timeout=time_out, timeout=time_out)
\ No newline at end of file
diff --git a/test/test_claude.py b/test/test_claude.py
index 0e533157..b8dd87a2 100644
--- a/test/test_claude.py
+++ b/test/test_claude.py
@@ -109,8 +109,7 @@ def get_token_count(self, convo_id: str = "default") -> int:
             raise NotImplementedError(
                 f"Engine {self.engine} is not supported. Select from {ENGINES}",
             )
-        tiktoken.model.MODEL_TO_ENCODING["gpt-4"] = "cl100k_base"
-        tiktoken.model.MODEL_TO_ENCODING["claude-2-web"] = "cl100k_base"
+        tiktoken.get_encoding("cl100k_base")
         tiktoken.model.MODEL_TO_ENCODING["claude-2"] = "cl100k_base"
 
         encoding = tiktoken.encoding_for_model(self.engine)
diff --git a/test/test_tikitoken.py b/test/test_tikitoken.py
new file mode 100644
index 00000000..84e85d95
--- /dev/null
+++ b/test/test_tikitoken.py
@@ -0,0 +1,4 @@
+import tiktoken
+# tiktoken.get_encoding("cl100k_base")
+tiktoken.model.MODEL_TO_ENCODING["claude-2.1"] = "cl100k_base"
+encoding = tiktoken.encoding_for_model("claude-2.1")
\ No newline at end of file
diff --git a/utils/chatgpt2api.py b/utils/chatgpt2api.py
index ff47b162..1090e13f 100644
--- a/utils/chatgpt2api.py
+++ b/utils/chatgpt2api.py
@@ -125,10 +125,7 @@ def get_token_count(self, convo_id: str = "default") -> int:
             raise NotImplementedError(
                 f"Engine {self.engine} is not supported. Select from {ENGINES}",
             )
-        tiktoken.model.MODEL_TO_ENCODING["gpt-4"] = "cl100k_base"
-        tiktoken.model.MODEL_TO_ENCODING["claude-2-web"] = "cl100k_base"
         tiktoken.model.MODEL_TO_ENCODING["claude-2"] = "cl100k_base"
-
         encoding = tiktoken.encoding_for_model(self.engine)
 
         num_tokens = 0
@@ -195,8 +192,9 @@ def ask_stream(
             # print(line)
             resp: dict = json.loads(line)
             content = resp.get("completion")
-            full_response += content
-            yield content
+            if content:
+                full_response += content
+                yield content
         self.add_to_conversation(full_response, response_role, convo_id=convo_id)
         # print(repr(self.conversation.Conversation(convo_id)))
         # print("total tokens:", self.get_token_count(convo_id))
@@ -395,7 +393,7 @@ def truncate_conversation(
         while True:
             json_post = self.get_post_body(prompt, role, convo_id, model, pass_history, **kwargs)
             url = config.bot_api_url.chat_url
-            if self.engine == "gpt-4-1106-preview" or self.engine == "gpt-3.5-turbo-1106":
+            if self.engine == "gpt-4-1106-preview" or self.engine == "gpt-3.5-turbo-1106" or self.engine == "claude-2":
                 message_token = {
                     "total": self.get_token_count(convo_id),
                 }
@@ -430,10 +428,9 @@ def get_token_count(self, convo_id: str = "default") -> int:
             raise NotImplementedError(
                 f"Engine {self.engine} is not supported. Select from {ENGINES}",
             )
-        # tiktoken.model.MODEL_TO_ENCODING["gpt-4"] = "cl100k_base"
-        # tiktoken.model.MODEL_TO_ENCODING["claude-2-web"] = "cl100k_base"
-        # tiktoken.model.MODEL_TO_ENCODING["claude-2"] = "cl100k_base"
         tiktoken.get_encoding("cl100k_base")
+        tiktoken.model.MODEL_TO_ENCODING["gpt-4"] = "cl100k_base"
+        tiktoken.model.MODEL_TO_ENCODING["claude-2"] = "cl100k_base"
 
         encoding = tiktoken.encoding_for_model(self.engine)
 
@@ -593,7 +590,7 @@ def ask_stream(
                 if "name" in delta["function_call"]:
                     function_call_name = delta["function_call"]["name"]
                 full_response += function_call_content
-                if full_response.count("\\n") > 2:
+                if full_response.count("\\n") > 2 or "}" in full_response:
                     break
         if need_function_call:
             full_response = check_json(full_response)