Add support for Claude, Anthropic

[iitrsamrat]

Describe the bug

[Bug]: Does not work with claude

Steps to reproduce

1. Use the following config for claude
   [
   {
   "model": "claude-3-opus-20240229",
   "api_key": "",
   "base_url": "https://api.anthropic.com",
   "api_type": "anthropic"
   }

]
2. Run the following code.

`import autogen
from autogen.agentchat.contrib.agent_builder import AgentBuilder

config_file_or_env = "OAI_CONFIG_LIST"
llm_config = {"temperature": 0}
config_list = autogen.config_list_from_json(config_file_or_env, filter_dict={"model": ["claude-3-opus-20240229"]})

def start_task(execution_task: str, agent_list: list):
group_chat = autogen.GroupChat(agents=agent_list, messages=[], max_round=12)
manager = autogen.GroupChatManager(groupchat=group_chat, llm_config={"config_list": config_list, **llm_config})
agent_list[0].initiate_chat(manager, message=execution_task)

builder = AgentBuilder(
config_file_or_env=config_file_or_env, builder_model="claude-3-opus-20240229", agent_model="claude-3-opus-20240229"
)
`

Model Used

claude 3 opus

Expected Behavior

No response

Screenshots and logs

No response

Additional Information

No response

[jackgerrits]

We do not currently have support for the Anthropic API, we are open to adding support for this though! Any help is appreciated

[jtoy]

this looks like a fun feature to build!

[levscaut]

Hey I'd like to help. Will draft a PR soon.

[ekzhu]

Thanks @levscaut we have a notebook example: https://microsoft.github.io/autogen/docs/topics/non-openai-models/cloud-anthropic

[levscaut]

Thanks @ekzhu @thinkall for the advice! Looking forward to more feedbacks!

[Duncan-Haywood]

Thanks for the work all.