spacy-llm: Integrating LLMs into structured NLP pipelines

This package integrates Large Language Models (LLMs) into spaCy, featuring a modular system for fast prototyping and prompting, and turning unstructured responses into robust outputs for various NLP tasks, no training data required.

• Serializable llm component to integrate prompts into your pipeline
• Modular functions to define the task (prompting and parsing) and backend (model to use)
• Support for hosted APIs and self-hosted open-source models
• Integration with MiniChain and LangChain
• Access to OpenAI API, including GPT-4 and various GPT-3 models
• Built-in support for open-source Dolly models hosted on Hugging Face
• Usage examples for Named Entity Recognition and Text Classification
• Easy implementation of your own functions via spaCy's registry for custom prompting, parsing and model integrations

🧠 Motivation

Large Language Models (LLMs) feature powerful natural language understanding capabilities. With only a few (and sometimes no) examples, an LLM can be prompted to perform custom NLP tasks such as text categorization, named entity recognition, coreference resolution, information extraction and more.

spaCy is a well-established library for building systems that need to work with language in various ways. spaCy's built-in components are generally powered by supervised learning or rule-based approaches.

Supervised learning is much worse than LLM prompting for prototyping, but for many tasks it's much better for production. A transformer model that runs comfortably on a single GPU is extremely powerful, and it's likely to be a better choice for any task for which you have a well-defined output. You train the model with anything from a few hundred to a few thousand labelled examples, and it will learn to do exactly that. Efficiency, reliability and control are all better with supervised learning, and accuracy will generally be higher than LLM prompting as well.

spacy-llm lets you have the best of both worlds. You can quickly initialize a pipeline with components powered by LLM prompts, and freely mix in components powered by other approaches. As your project progresses, you can look at replacing some or all of the LLM-powered components as you require.

Of course, there can be components in your system for which the power of an LLM is fully justified. If you want a system that can synthesize information from multiple documents in subtle ways and generate a nuanced summary for you, bigger is better. However, even if your production system needs an LLM for some of the task, that doesn't mean you need an LLM for all of it. Maybe you want to use a cheap text classification model to help you find the texts to summarize, or maybe you want to add a rule-based system to sanity check the output of the summary. These before-and-after tasks are much easier with a mature and well-thought-out library, which is exactly what spaCy provides.

⏳ Install

spacy-llm will be installed automatically in future spaCy versions. For now, you can run the following in the same virtual environment where you already have spacy installed.

python -m pip install spacy-llm

⚠️ This package is still experimental and it is possible that changes made to the interface will be breaking in minor version updates.

🐍 Usage

The task and the backend have to be supplied to the llm pipeline component using spaCy's config system. This package provides various built-in functionality, as detailed in the API documentation.

Example 1: Add a text classifier using a GPT-3 model from OpenAI

Create a new API key from openai.com or fetch an existing one, and ensure the keys are set as environmental variables. For more background information, see the OpenAI section.

Create a config file config.cfg containing at least the following (or see the full example here):

[nlp]
lang = "en"
pipeline = ["llm"]

[components]

[components.llm]
factory = "llm"

[components.llm.task]
@llm_tasks = "spacy.TextCat.v1"
labels = COMPLIMENT,INSULT

[components.llm.backend]
@llm_backends = "spacy.REST.v1"
api = "OpenAI"
config = {"model": "text-davinci-003", "temperature": 0.3}

Now run:

from spacy import util

config = util.load_config("config.cfg")
nlp = util.load_model_from_config(config, auto_fill=True)
doc = nlp("You look gorgeous!")
print(doc.cats)

Example 2: Add NER using an open-source model through Hugging Face

To run this example, ensure that you have a GPU enabled, and transformers, torch and CUDA installed. For more background information, see the DollyHF section.

Create a config file config.cfg containing at least the following (or see the full example here):

[nlp]
lang = "en"
pipeline = ["llm"]

[components]

[components.llm]
factory = "llm"

[components.llm.task]
@llm_tasks = "spacy.NER.v1"
labels = PERSON,ORGANISATION,LOCATION

[components.llm.backend]
@llm_backends = "spacy.DollyHF.v1"
# For better performance, use databricks/dolly-v2-12b instead
model = "databricks/dolly-v2-3b"

Now run:

from spacy import util

config = util.load_config("config.cfg")
nlp = util.load_model_from_config(config, auto_fill=True)
doc = nlp("Jack and Jill rode up the hill in Les Deux Alpes")
print([(ent.text, ent.label_) for ent in doc.ents])

Note that Hugging Face will download the "databricks/dolly-v2-3b" model the first time you use it. You can define the cached directory by setting the environmental variable HF_HOME. Also, you can upgrade the model to be "databricks/dolly-v2-12b" for better performance.

Example 3: Create the component directly in Python

The llm component behaves as any other spaCy component does, so adding it to an existing pipeline follows the same pattern:

import spacy

nlp = spacy.blank("en")
nlp.add_pipe(
    "llm",
    config={
        "task": {
            "@llm_tasks": "spacy.NER.v1",
            "labels": "PERSON,ORGANISATION,LOCATION"
        },
        "backend": {
            "@llm_backends": "spacy.REST.v1",
            "api": "OpenAI",
            "config": {"model": "text-davinci-003"},
        },
    },
)
doc = nlp("Jack and Jill rode up the hill in Les Deux Alpes")
print([(ent.text, ent.label_) for ent in doc.ents])

Note that for efficient usage of resources, typically you would use nlp.pipe(docs) with a batch, instead of calling nlp(doc) with a single document.

Example 4: Implement your own custom task

To write a task, you need to implement two functions: generate_prompts that takes a list of spaCy Doc objects and transforms them into a list of prompts, and parse_responses that transforms the LLM outputs into annotations on the Doc, e.g. entity spans, text categories and more.

📖 For more details, see the usage example on writing your own task

from spacy_llm.registry import registry

@registry.llm_tasks("spacy.MyTask.v1")
class MyTask:
    def __init__(self, labels: str):
        ...

    def generate_prompts(self, docs: Iterable[Doc]) -> Iterable[str]:
        ...

    def parse_responses(
        self, docs: Iterable[Doc], responses: Iterable[str]
    ) -> Iterable[Doc]:
        ...

# config.cfg (excerpt)
[components.llm.task]
@llm_tasks = "spacy.MyTask.v1"
labels = LABEL1,LABEL2,LABEL3

📓 API

Each llm component is defined by two main settings:

• A task, defining the prompt to send to the LLM as well as the functionality to parse the resulting response back into structured fields on spaCy's Doc objects.
• A backend defining the model to use and how to connect to it. Note that spacy-llm supports both access to external APIs (such as OpenAI) as well as access to self-hosted open-source LLMs (such as using Dolly through Hugging Face).

Tasks

A task defines an NLP problem or question, that will be sent to the LLM via a prompt. Further, the task defines how to parse the LLM's responses back into structured information. All tasks are registered in spaCy's llm_tasks registry.

Practically speaking, a task should adhere to the Protocol LLMTask defined in ty.py. It needs to define a generate_prompts function and a parse_responses function.

function task.generate_prompts

Takes a collection of documents, and returns a collection of "prompts", which can be of type Any. Often, prompts are of type str - but this is not enforced to allow for maximum flexibility in the framework.

function task.parse_responses

Takes a collection of LLM responses and the original documents, parses the responses into structured information, and sets the annotations on the documents. The parse_responses function is free to set the annotations in any way, including Doc fields like ents, spans or cats, or using custom defined fields.

The responses are of type Iterable[Any], though they will often be str objects. This depends on the return type of the backend.

spacy.NER.v1

The built-in NER task supports both zero-shot and few-shot prompting.

[components.llm.task]
@llm_tasks = "spacy.NER.v1"
labels = PERSON,ORGANISATION,LOCATION
examples = null

The NER task implementation doesn't currently ask the LLM for specific offsets, but simply expects a list of strings that represent the enties in the document. This means that a form of string matching is required. This can be configured by the following parameters:

• The single_match parameter is typically set to False to allow for multiple matches. For instance, the response from the LLM might only mention the entity "Paris" once, but you'd still want to mark it every time it occurs in the document.
• The case-sensitive matching is typically set to False to be robust against case variances in the LLM's output.
• The alignment_mode argument is used to match entities as returned by the LLM to the tokens from the original Doc - specifically it's used as argument in the call to doc.char_span(). The "strict" mode will only keep spans that strictly adhere to the given token boundaries. "contract" will only keep those tokens that are fully within the given range, e.g. reducing "New Y" to "New". Finally, "expand" will expand the span to the next token boundaries, e.g. expanding "New Y" out to "New York".

To perform few-shot learning, you can write down a few examples in a separate file, and provide these to be injected into the prompt to the LLM. The default reader spacy.FewShotReader.v1 supports .yml, .yaml, .json and .jsonl.

- text: Jack and Jill went up the hill.
  entities:
    PERSON:
      - Jack
      - Jill
    LOCATION:
      - hill
- text: Jack fell down and broke his crown.
  entities:
    PERSON:
      - Jack

[components.llm.task]
@llm_tasks = "spacy.NER.v1"
labels = PERSON,ORGANISATION,LOCATION
[components.llm.task.examples]
@misc = "spacy.FewShotReader.v1"
path = "ner_examples.yml"

spacy.TextCat.v1

The built-in TextCat task supports both zero-shot and few-shot prompting.

[components.llm.task]
@llm_tasks = "spacy.TextCat.v1"
labels = COMPLIMENT,INSULT
examples = null

To perform few-shot learning, you can write down a few examples in a separate file, and provide these to be injected into the prompt to the LLM. The default reader spacy.FewShotReader.v1 supports .yml, .yaml, .json and .jsonl.

[
  {
    "text": "You look great!",
    "answer": "Compliment"
  },
  {
    "text": "You are not very clever at all.",
    "answer": "Insult"
  }
]

[components.llm.task]
@llm_tasks = "spacy.TextCat.v1"
labels = COMPLIMENT,INSULT
[components.llm.task.examples]
@misc = "spacy.FewShotReader.v1"
path = "textcat_examples.json"

spacy.NoOp.v1

This task is only useful for testing - it tells the LLM to do nothing, and does not set any fields on the docs.

[components.llm.task]
@llm_tasks = "spacy.NoOp.v1"

Backends

A backend defines which LLM model to query, and how to query it. It can be a simple function taking a collection of prompts (consistent with the output type of task.generate_prompts()) and returning a collection of responses (consistent with the expected input of parse_responses). Generally speaking, it's a function of type Callable[[Iterable[Any]], Iterable[Any]], but specific implementations can have other signatures, like Callable[[Iterable[str]], Iterable[str]].

All built-in backends are registered in llm_backends. If no backend is specified, the repo currently connects to the OpenAI API by default, using the built-in REST protocol, and accesses the "text-davinci-003" model.

OpenAI

When the backend uses OpenAI, you have to get an API key from openai.com, and ensure that the keys are set as environmental variables. For instance, set a .env file in the root of your directory with the following information, and make sure to exclude this file from git versioning:

OPENAI_ORG = "org-..."
OPENAI_API_KEY = "sk-..."

spacy.REST.v1

This default backend uses requests and a simple retry mechanism to access an API.

[components.llm.backend]
@llm_backends = "spacy.REST.v1"
api = "OpenAI"
config = {"model": "text-davinci-003", "temperature": 0.3}

When api is set to OpenAI, the following settings can be defined in the config dictionary:

• model: one of the following list of supported models:
  • "gpt-4"
  • "gpt-4-0314"
  • "gpt-4-32k"
  • "gpt-4-32k-0314"
  • "gpt-3.5-turbo"
  • "gpt-3.5-turbo-0301"
  • "text-davinci-003"
  • "text-davinci-002"
  • "text-curie-001"
  • "text-babbage-001"
  • "text-ada-001"
  • "davinci"
  • "curie"
  • "babbage"
  • "ada"
• url: By default, this is https://api.openai.com/v1/completions. For models requiring the chat endpoint, use https://api.openai.com/v1/chat/completions.

spacy.MiniChain.v1

To use MiniChain for the API retrieval part, make sure you have installed it first:

python -m pip install "minichain>=0.3,<0.4"

Note that MiniChain currently only supports Python 3.8, 3.9 and 3.10.

Example config blocks:

[components.llm.backend]
@llm_backends = "spacy.MiniChain.v1"
api = "OpenAI"

[components.llm.backend.query]
@llm_queries = "spacy.RunMiniChain.v1"

The default query (spacy.RunMiniChain.v1) executes the prompts by running model(text).run() for each given textual prompt.

spacy.LangChain.v1

To use LangChain for the API retrieval part, make sure you have installed it first:

python -m pip install "langchain>=0.0.144,<0.1"

Note that LangChain currently only supports Python 3.9 and beyond.

Example config block:

[components.llm.backend]
@llm_backends = "spacy.LangChain.v1"
api = "OpenAI"
query = {"@llm_queries": "spacy.CallLangChain.v1"}
config = {"temperature": 0.3}

The default query (spacy.CallLangChain.v1) executes the prompts by running model(text) for each given textual prompt.

spacy.DollyHF.v1

To use this backend, ideally you have a GPU enabled and have installed transformers, torch and CUDA in your virtual environment. This allows you to have the setting device=cuda:0 in your config, which ensures that the model is loaded entirely on the GPU (and fails otherwise).

python -m pip install "cupy-cuda11x"
python -m pip install "torch>=1.13.1,<2.0"
python -m pip install "transformers>=4.28.1,<5.0"

If you don't have access to a GPU, you can install accelerate and setdevice_map=auto instead, but be aware that this may result in some layers getting distributed to the CPU or even the hard drive, which may ultimately result in extremely slow queries.

python -m pip install "accelerate>=0.16.0,<1.0"

Example config block:

[components.llm.backend]
@llm_backends = "spacy.DollyHF.v1"
model = "databricks/dolly-v2-3b"

Supported models (see the Databricks models page on Hugging Face for details):

• "databricks/dolly-v2-3b"
• "databricks/dolly-v2-7b"
• "databricks/dolly-v2-12b"

Note that Hugging Face will download this model the first time you use it - you can define the cached directory by setting the environmental variable HF_HOME.

Various functions

spacy.FewShotReader.v1

This function is registered in spaCy's misc registry, and reads in examples from a .yml, .yaml, .json or .jsonl file. It uses srsly to read in these files and parses them depending on the file extension.

[components.llm.task.examples]
@misc = "spacy.FewShotReader.v1"
path = "ner_examples.yml"

Normalizer functions

These functions provide simple normalizations for string comparisons, e.g. between a list of specified labels and a label given in the raw text of the LLM response. They are registered in spaCy's misc registry and have the signature Callable[[str], str].

• spacy.StripNormalizer.v1: only apply text.strip()
• spacy.LowercaseNormalizer.v1: applies text.strip().lower() to compare strings in a case-insensitive way.

🚀 Ongoing work

In the near future, we will

• Add more example tasks
• Support a broader range of models
• Provide more example use-cases and tutorials
• Make the built-in tasks easier to customize via Jinja templates to define the instructions & examples

PRs are always welcome!

📝️ Reporting issues

If you have questions regarding the usage of spacy-llm, or want to give us feedback after giving it a spin, please use the discussion board. Bug reports can be filed on the spaCy issue tracker. Thank you!