language: en
license: cc-by-4.0
datasets:

• squad_v2
  model-index:
• name: deepset/roberta-base-squad2
  results:
  • task:
    type: question-answering
    name: Question Answering
    dataset:
    name: squad_v2
    type: squad_v2
    config: squad_v2
    split: validation
    metrics:
    • type: exact_match
      value: 79.9309
      name: Exact Match
      verified: true
      verifyToken: >-
      eyJhbGciOiJFZERTQSIsInR5cCI6IkpXVCJ9.eyJoYXNoIjoiMDhhNjg5YzNiZGQ1YTIyYTAwZGUwOWEzZTRiYzdjM2QzYjA3ZTUxNDM1NjE1MTUyMjE1MGY1YzEzMjRjYzVjYiIsInZlcnNpb24iOjF9.EH5JJo8EEFwU7osPz3s7qanw_tigeCFhCXjSfyN0Y1nWVnSfulSxIk_DbAEI5iE80V4EKLyp5-mYFodWvL2KDA
    • type: f1
      value: 82.9501
      name: F1
      verified: true
      verifyToken: >-
      eyJhbGciOiJFZERTQSIsInR5cCI6IkpXVCJ9.eyJoYXNoIjoiMjk5ZDYwOGQyNjNkMWI0OTE4YzRmOTlkY2JjNjQ0YTZkNTMzMzNkYTA0MDFmNmI3NjA3NjNlMjhiMDQ2ZjJjNSIsInZlcnNpb24iOjF9.DDm0LNTkdLbGsue58bg1aH_s67KfbcmkvL-6ZiI2s8IoxhHJMSf29H_uV2YLyevwx900t-MwTVOW3qfFnMMEAQ
    • type: total
      value: 11869
      name: total
      verified: true
      verifyToken: >-
      eyJhbGciOiJFZERTQSIsInR5cCI6IkpXVCJ9.eyJoYXNoIjoiMGFkMmI2ODM0NmY5NGNkNmUxYWViOWYxZDNkY2EzYWFmOWI4N2VhYzY5MGEzMTVhOTU4Zjc4YWViOGNjOWJjMCIsInZlcnNpb24iOjF9.fexrU1icJK5_MiifBtZWkeUvpmFISqBLDXSQJ8E6UnrRof-7cU0s4tX_dIsauHWtUpIHMPZCf5dlMWQKXZuAAA
  • task:
    type: question-answering
    name: Question Answering
    dataset:
    name: squad
    type: squad
    config: plain_text
    split: validation
    metrics:
    • type: exact_match
      value: 85.289
      name: Exact Match
    • type: f1
      value: 91.841
      name: F1
  • task:
    type: question-answering
    name: Question Answering
    dataset:
    name: adversarial_qa
    type: adversarial_qa
    config: adversarialQA
    split: validation
    metrics:
    • type: exact_match
      value: 29.5
      name: Exact Match
    • type: f1
      value: 40.367
      name: F1
  • task:
    type: question-answering
    name: Question Answering
    dataset:
    name: squad_adversarial
    type: squad_adversarial
    config: AddOneSent
    split: validation
    metrics:
    • type: exact_match
      value: 78.567
      name: Exact Match
    • type: f1
      value: 84.469
      name: F1
  • task:
    type: question-answering
    name: Question Answering
    dataset:
    name: squadshifts amazon
    type: squadshifts
    config: amazon
    split: test
    metrics:
    • type: exact_match
      value: 69.924
      name: Exact Match
    • type: f1
      value: 83.284
      name: F1
  • task:
    type: question-answering
    name: Question Answering
    dataset:
    name: squadshifts new_wiki
    type: squadshifts
    config: new_wiki
    split: test
    metrics:
    • type: exact_match
      value: 81.204
      name: Exact Match
    • type: f1
      value: 90.595
      name: F1
  • task:
    type: question-answering
    name: Question Answering
    dataset:
    name: squadshifts nyt
    type: squadshifts
    config: nyt
    split: test
    metrics:
    • type: exact_match
      value: 82.931
      name: Exact Match
    • type: f1
      value: 90.756
      name: F1
  • task:
    type: question-answering
    name: Question Answering
    dataset:
    name: squadshifts reddit
    type: squadshifts
    config: reddit
    split: test
    metrics:
    • type: exact_match
      value: 71.55
      name: Exact Match
    • type: f1
      value: 82.939
      name: F1

base_model:

• FacebookAI/roberta-base

roberta-base for Extractive QA

This is the roberta-base model, fine-tuned using the SQuAD2.0 dataset. It's been trained on question-answer pairs, including unanswerable questions, for the task of Extractive Question Answering.
We have also released a distilled version of this model called deepset/tinyroberta-squad2. It has a comparable prediction quality and runs at twice the speed of deepset/roberta-base-squad2.

Overview

Language model: roberta-base
Language: English
Downstream-task: Extractive QA
Training data: SQuAD 2.0
Eval data: SQuAD 2.0
Code: See an example extractive QA pipeline built with Haystack
Infrastructure: 4x Tesla v100

Hyperparameters

batch_size = 96
n_epochs = 2
base_LM_model = "roberta-base"
max_seq_len = 386
learning_rate = 3e-5
lr_schedule = LinearWarmup
warmup_proportion = 0.2
doc_stride=128
max_query_length=64

Usage

In Haystack

Haystack is an AI orchestration framework to build customizable, production-ready LLM applications. You can use this model in Haystack to do extractive question answering on documents.
To load and run the model with Haystack:

# After running pip install haystack-ai "transformers[torch,sentencepiece]"

from haystack import Document
from haystack.components.readers import ExtractiveReader
docs = [
    Document(content="Python is a popular programming language"),
    Document(content="python ist eine beliebte Programmiersprache"),
]
reader = ExtractiveReader(model="deepset/roberta-base-squad2")
reader.warm_up()
question = "What is a popular programming language?"
result = reader.run(query=question, documents=docs)
{'answers': [ExtractedAnswer(query='What is a popular programming language?', score=0.5740374326705933, data='python', document=Document(id=..., content: '...'), context=None, document_offset=ExtractedAnswer.Span(start=0, end=6),...)]}

For a complete example with an extractive question answering pipeline that scales over many documents, check out the corresponding Haystack tutorial.

In Transformers

from transformers import AutoModelForQuestionAnswering, AutoTokenizer, pipeline

model_name = "deepset/roberta-base-squad2"
a) Get predictions
nlp = pipeline('question-answering', model=model_name, tokenizer=model_name)
QA_input = {
    'question': 'Why is model conversion important?',
    'context': 'The option to convert models between FARM and transformers gives freedom to the user and let people easily switch between frameworks.'
}
res = nlp(QA_input)
b) Load model & tokenizer
model = AutoModelForQuestionAnswering.from_pretrained(model_name)
tokenizer = AutoTokenizer.from_pretrained(model_name)

Performance

Evaluated on the SQuAD 2.0 dev set with the official eval script.

"exact": 79.87029394424324,
"f1": 82.91251169582613,

"total": 11873,
"HasAns_exact": 77.93522267206478,
"HasAns_f1": 84.02838248389763,
"HasAns_total": 5928,
"NoAns_exact": 81.79983179142137,
"NoAns_f1": 81.79983179142137,
"NoAns_total": 5945

Authors

Branden Chan: [email protected]
Timo Möller: [email protected]
Malte Pietsch: [email protected]
Tanay Soni: [email protected]

About us

deepset is the company behind the production-ready open-source AI framework Haystack.

Some of our other work:

• Distilled roberta-base-squad2 (aka "tinyroberta-squad2")
• German BERT, GermanQuAD and GermanDPR, German embedding model
• deepset Cloud
• deepset Studio

Get in touch and join the Haystack community

For more info on Haystack, visit our GitHub repo and Documentation.

We also have a Discord community open to everyone!

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By the way: we're hiring!