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DeepInfra

DeepInfra is a serverless inference as a service that provides access to a variety of LLMs and embeddings models. This notebook goes over how to use LangChain with DeepInfra for chat models.

Set the Environment API Key​

Make sure to get your API key from DeepInfra. You have to Login and get a new token.

You are given a 1 hour free of serverless GPU compute to test different models. (see here) You can print your token with deepctl auth token

# get a new token: https://deepinfra.com/login?from=%2Fdash

import os
from getpass import getpass

from langchain_community.chat_models import ChatDeepInfra
from langchain_core.messages import HumanMessage

DEEPINFRA_API_TOKEN = getpass()

# or pass deepinfra_api_token parameter to the ChatDeepInfra constructor
os.environ["DEEPINFRA_API_TOKEN"] = DEEPINFRA_API_TOKEN

chat = ChatDeepInfra(model="meta-llama/Llama-2-7b-chat-hf")

messages = [
    HumanMessage(
        content="Translate this sentence from English to French. I love programming."
    )
]
chat.invoke(messages)

ChatDeepInfra also supports async and streaming functionality:​

from langchain.callbacks.streaming_stdout import StreamingStdOutCallbackHandler
await chat.agenerate([messages])
chat = ChatDeepInfra(
    streaming=True,
    verbose=True,
    callbacks=[StreamingStdOutCallbackHandler()],
)
chat.invoke(messages)

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