chat_vllm: Chat with a model hosted by vLLM

In ellmer: Chat with Large Language Models

Chat with a model hosted by vLLM

Description

vLLM is an open source library that provides an efficient and convenient LLMs model server. You can use chat_vllm() to connect to endpoints powered by vLLM.

Usage

chat_vllm(
  base_url,
  system_prompt = NULL,
  turns = NULL,
  model,
  seed = NULL,
  api_args = list(),
  api_key = vllm_key(),
  echo = NULL
)

Arguments

base_url	The base URL to the endpoint; the default uses OpenAI.
system_prompt	A system prompt to set the behavior of the assistant.
turns	A list of Turns to start the chat with (i.e., continuing a previous conversation). If not provided, the conversation begins from scratch.
model	The model to use for the chat. The default, NULL, will pick a reasonable default, and tell you about. We strongly recommend explicitly choosing a model for all but the most casual use.
seed	Optional integer seed that ChatGPT uses to try and make output more reproducible.
api_args	Named list of arbitrary extra arguments appended to the body of every chat API call.
api_key	The API key to use for authentication. You generally should not supply this directly, but instead set the VLLM_API_KEY environment variable.
echo	One of the following options: none: don't emit any output (default when running in a function). text: echo text output as it streams in (default when running at the console). all: echo all input and output. Note this only affects the chat() method.

Value

A Chat object.

Examples

## Not run: 
chat <- chat_vllm("http://my-vllm.com")
chat$chat("Tell me three jokes about statisticians")

## End(Not run)

ellmer documentation built on April 4, 2025, 3:53 a.m.