bump models

app.py

@@ -294,7 +294,7 @@ class ChatSession(BaseModel):
     ) -> Tuple[Union[ChatOpenAI, ChatAnthropic], int, tiktoken.tokenizer]:
         if use_claude:
             llm = ChatAnthropic(
-                model="claude-2.1",
+                model="claude-3-5-sonnet-20240620",
                 anthropic_api_key=ANTHROPIC_API_KEY,
                 temperature=1,
                 max_tokens_to_sample=2048,
@@ -305,7 +305,7 @@ class ChatSession(BaseModel):
             return llm, context_length, tokenizer
         else:
             llm = ChatOpenAI(
-                model_name="gpt-4",
+                model_name="gpt-4o",
                 temperature=1,
                 openai_api_key=OPENAI_API_KEY,
                 max_retries=6,