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Add support for Ollama, Palm, Claude-2, Cohere, Replicate Llama2 CodeLlama (100+LLMs) - using LiteLLM #1112

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Add support for Ollama, Palm, Claude-2, Cohere, Replicate Llama2 CodeLlama (100+LLMs) - using LiteLLM #1112

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ishaan-jaff
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This PR adds support for the above mentioned LLMs using LiteLLM https://github.com/BerriAI/litellm/
LiteLLM is a lightweight package to simplify LLM API calls - use any llm as a drop in replacement for gpt-3.5-turbo.

Example

from litellm import completion

## set ENV variables
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(model="command-nightly", messages)

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

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@levkk @montanalow can I get a review on this PR ?

@kczimm kczimm requested a review from santiatpml October 23, 2023 17:33
santiatpml
santiatpml reviewed Oct 23, 2023
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@ishaan-jaff Thanks for the PR. litellm seems like a promising addition to pgml-chat. I would like to pull this into our upcoming upgrade to pgml-chat (#1047).
When I try to install litellm using poetry (poetry add litellm) I see the following error. Could you please look into this?

Because no versions of litellm match >0.11.1,<0.12.0
 and litellm (0.11.1) depends on appdirs (>=1.4.4,<2.0.0), litellm (>=0.11.1,<0.12.0) requires appdirs (>=1.4.4,<2.0.0).
So, because no versions of appdirs match >=1.4.4,<2.0.0
 and pgml-chat depends on litellm (^0.11.1), version solving failed.

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@ishaan-jaff @cognitivetech @santiatpml