Add amazon bedrock 3p models to the model configuration.

[subhaviv]

I want to add bedrock 3rd party models to the list of models available . Will use the Bedrock Client API's from the model providers if they have them((Anthropic, Cohere and A121 ), Otherwise create one like the one for Titan. What are your thoughts?

[yifanmai]

Yes, I think it would be good to add the Bedrock models. In general, you would subclass the respective client in HELM (e.g. AnthropicClient) and modify it to connect to Bedrock. See here for the respective docs:

• Anthropic
• AI21
• Cohere

Also refer to #1713 for some previous notes.

[subhaviv]

I added Mistral and LLAMA3 models on bedrock and submitted a PR. I will add the other 3 models next week. Thank you