Add support for Azure, OpenAI, Palm, Anthropic, Cohere Models - using litellm

[ishaan-jaff]

Pull Request Template

Description

Add support for Azure, OpenAI, Palm, Anthropic, Cohere Models - using litellm

Please include a summary of the change and which issue is fixed. Please also include relevant motivation and context. List any dependencies that are required for this change. I'm the maintainer of litellm https://github.com/BerriAI/litellm - a simple & light package to call OpenAI, Azure, Cohere, Anthropic, Replicate API Endpoints

This PR adds support for models from all the above mentioned providers (by creating a class liteLLMChatGPTBot)

Here's a sample of how it's used:

from litellm import completion

## set ENV variables
# ENV variables can be set in .env file, too. Example in .env.example
os.environ["OPENAI_API_KEY"] = "openai key"
os.environ["COHERE_API_KEY"] = "cohere key"

messages = [{ "content": "Hello, how are you?","role": "user"}]

# openai call
response = completion(model="gpt-3.5-turbo", messages=messages)

# cohere call
response = completion("command-nightly", messages)

# anthropic call
response = completion(model="claude-instant-1", messages=messages)

Type of change

Please delete options that are not relevant.

• [ ] Bug fix (non-breaking change which fixes an issue)
• [x] New feature (non-breaking change which adds functionality)
• [ ] Breaking change (fix or feature that would cause existing functionality to not work as expected)
• [ ] This change requires a documentation update

How Has This Been Tested?

Please describe the tests that you ran to verify your changes. Provide instructions so we can reproduce. Please also list any relevant details for your test configuration

• [ ] Test A
• [ ] Test B

Test Configuration:

• Firmware version:
• Hardware:
• Toolchain:
• SDK:

Checklist

• [x] My code follows the style guidelines of this project
• [x] I have performed a self-review of my own code
• [x] I have commented my code, particularly in hard-to-understand areas
• [ ] I have made corresponding changes to the documentation
• [ ] My changes generate no new warnings
• [ ] I have added tests that prove my fix is effective or that my feature works
• [ ] New and existing unit tests pass locally with my changes
• [ ] Any dependent changes have been merged and published in downstream modules
• [ ] I have checked my code and corrected any misspellings

[ishaan-jaff]

@Officeyutong @try-agaaain if this initial PR looks good - I'd love to add tests, documentation on using this. Would love your feedback on the same

[yunwei37]

Thank you very much! It looks nice, and please add more tests for it : )

[yunwei37]

Thanks : )