llmlite

🌵 llmlite is a library helps to communicate with all kinds of LLMs consistently.

Features

• State-of-the-art LLMs support
• Continuous Batching via vLLM
• Quantization([issue#37] (#37))
• Loading specific adapters (issue#51)
• Streaming (issue#52)

Model Support

Model	State	System Prompt	Note
ChatGPT	Done ✅	Yes
Llama-2	Done ✅	Yes
CodeLlama	Done ✅	Yes
ChatGLM2	Done ✅	No
Baichuan2	Done ✅	Yes
ChatGLM3	WIP ⏳	Yes
Claude-2	RoadMap 📋		issue#7
Falcon	RoadMap 📋		issue#8
StableLM	RoadMap 📋		issue#11

Backend Support

backend	State
huggingface	Done ✅
vLLM	Done ✅

How to install

pip install llmlite==0.0.15

How to use

Chat

from llmlite import ChatLLM, ChatMessage

chat = ChatLLM(
    model_name_or_path="meta-llama/Llama-2-7b-chat-hf", # required
    task="text-generation",
    )

result = chat.completion(
  messages=[
    ChatMessage(role="system", content="You're a honest assistant."),
    ChatMessage(role="user", content="There's a llama in my garden, what should I do?"),
  ]
)

# Output: Oh my goodness, a llama in your garden?! 😱 That's quite a surprise! 😅 As an honest assistant, I must inform you that llamas are not typically known for their gardening skills, so it's possible that the llama in your garden may have wandered there accidentally or is seeking shelter. 🐮 ...

Continuous Batching

This is mostly supported by vLLM, you can enable this by configuring the backend.

from llmlite import ChatLLM, ChatMessage

chat = ChatLLM(
    model_name_or_path="meta-llama/Llama-2-7b-chat-hf",
    backend="vllm",
)

results = chat.completion(
    messages=[
        [
            ChatMessage(role="system", content="You're a honest assistant."),
            ChatMessage( role="user", content="There's a llama in my garden, what should I do?"),
        ],
        [
            ChatMessage(role="user", content="What's the population of the world?"),
        ],
    ],
    max_tokens=2048,
)

for result in results:
    print(f"RESULT: \n{result}\n\n")

llmlite also supports other parameters like temperature, max_length, do_sample, top_k, top_p to help control the length, randomness and diversity of the generated text.

See examples for reference.

Prompting

You can use llmlite to help you generate full prompts, for instance:

from llmlite import ChatLLM

messages = [
    ChatMessage(role="system", content="You're a honest assistant."),
    ChatMessage(role="user", content="There's a llama in my garden, what should I do?"),
]

ChatLLM.prompt("meta-llama/Llama-2-7b-chat-hf", messages)

# Output:
# <s>[INST] <<SYS>>
# You're a honest assistant.
# <</SYS>>

# There's a llama in my garden, what should I do? [/INST]

Logging

Set the env variable LOG_LEVEL for log configuration, default to INFO, others like DEBUG, INFO, WARNING etc..

Contributions

🚀 All kinds of contributions are welcomed ! Please follow Contributing.

Contributors

🎉 Thanks to all these contributors.