vllm/docs/source/serving/serving_with_langchain.rst
2023-11-30 10:57:44 -08:00

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.. _run_on_langchain:
Serving with Langchain
============================
vLLM is also available via `Langchain <https://github.com/langchain-ai/langchain>`_ .
To install langchain, run
.. code-block:: console
$ pip install langchain -q
To run inference on a single or multiple GPUs, use ``VLLM`` class from ``langchain``.
.. code-block:: python
from langchain.llms import VLLM
llm = VLLM(model="mosaicml/mpt-7b",
trust_remote_code=True, # mandatory for hf models
max_new_tokens=128,
top_k=10,
top_p=0.95,
temperature=0.8,
# tensor_parallel_size=... # for distributed inference
)
print(llm("What is the capital of France ?"))
Please refer to this `Tutorial <https://github.com/langchain-ai/langchain/blob/master/docs/extras/integrations/llms/vllm.ipynb>`_ for more details.