README.md

---
language: en
license: cc-by-4.0
base_model: google/flan-t5-xl
tags:
- question-answering
- flan
- flan-t5
- squad
- squad_v2
datasets:
- squad_v2
- squad
model-index:
- name: deepset/flan-t5-xl-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: 88.790
      name: Exact Match
    - type: f1
      value: 91.617
      name: F1
  - task:
      type: question-answering
      name: Question Answering
    dataset:
      name: squad
      type: squad
      config: plain_text
      split: validation
    metrics:
    - type: exact_match
      value: 90.331
      name: Exact Match
    - type: f1
      value: 95.722
      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: 54.367
      name: Exact Match
    - type: f1
      value: 68.055
      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: 87.241
      name: Exact Match
    - type: f1
      value: 92.894
      name: F1
  - task:
      type: question-answering
      name: Question Answering
    dataset:
      name: squadshifts amazon
      type: squadshifts
      config: amazon
      split: test
    metrics:
    - type: exact_match
      value: 77.602
      name: Exact Match
    - type: f1
      value: 90.426
      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: 85.639
      name: Exact Match
    - type: f1
      value: 93.974
      name: F1
  - task:
      type: question-answering
      name: Question Answering
    dataset:
      name: squadshifts nyt
      type: squadshifts
      config: nyt
      split: test
    metrics:
    - type: exact_match
      value: 87.392
      name: Exact Match
    - type: f1
      value: 94.579
      name: F1
  - task:
      type: question-answering
      name: Question Answering
    dataset:
      name: squadshifts reddit
      type: squadshifts
      config: reddit
      split: test
    metrics:
    - type: exact_match
      value: 79.323
      name: Exact Match
    - type: f1
      value: 90.083
      name: F1

---
# flan-t5-xl for Extractive QA 

This is the [flan-t5-xl](https://huggingface.co/google/flan-t5-xl) model, fine-tuned using the [SQuAD2.0](https://huggingface.co/datasets/squad_v2) dataset. It's been trained on question-answer pairs, including unanswerable questions, for the task of Extractive Question Answering. 


## Overview
**Language model:** flan-t5-xl  
**Language:** English  
**Downstream-task:** Extractive QA  
**Training data:** SQuAD 2.0  
**Eval data:** SQuAD 2.0  
**Code:**  See [an example QA pipeline on Haystack](https://haystack.deepset.ai/tutorials/first-qa-system)  

## Hyperparameters

```
learning_rate: 1e-05
train_batch_size: 4
eval_batch_size: 8
seed: 42
gradient_accumulation_steps: 16
total_train_batch_size: 64
optimizer: Adam with betas=(0.9,0.999) and epsilon=1e-08
lr_scheduler_type: linear
lr_scheduler_warmup_ratio: 0.1
num_epochs: 4.0
``` 

## Usage

### In Haystack
Haystack is an NLP framework by deepset. You can use this model in a Haystack pipeline to do extractive question answering at scale (over many documents). To load the model in [Haystack](https://github.com/deepset-ai/haystack/):
```python
# NOTE: This only works with Haystack v2.0!
reader = ExtractiveReader(model_name_or_path="deepset/flan-t5-xl-squad2")
```

### In Transformers
```python
from transformers import AutoModelForQuestionAnswering, AutoTokenizer, pipeline

model_name = "deepset/flan-t5-xl-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)
```

## Authors
**Sebastian Husch Lee:** sebastian.huschlee [at] deepset.ai


## About us
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[deepset](http://deepset.ai/) is the company behind the open-source NLP framework [Haystack](https://haystack.deepset.ai/) which is designed to help you build production ready NLP systems that use: Question answering, summarization, ranking etc.


## Get in touch and join the Haystack community

<p>For more info on Haystack, visit our <strong><a href="https://github.com/deepset-ai/haystack">GitHub</a></strong> repo and <strong><a href="https://haystack.deepset.ai">Documentation</a></strong>. 

We also have a <strong><a class="h-7" href="https://haystack.deepset.ai/community/join">Discord community open to everyone!</a></strong></p>

[Twitter](https://twitter.com/deepset_ai) | [LinkedIn](https://www.linkedin.com/company/deepset-ai/) | [Discord](https://haystack.deepset.ai/community/join) | [GitHub Discussions](https://github.com/deepset-ai/haystack/discussions) | [Website](https://deepset.ai)