AfriXNLI

An MTEB dataset

Massive Text Embedding Benchmark

Cross-lingual natural language inference dataset focusing on African languages.

Task category	t2t
Domains	News, Written
Reference	https://github.com/masakhane-io/afri-xnli

Source datasets:

• masakhane/afrixnli

Dataset Preparation in MTEB

This repository is a staging copy of masakhane/afrixnli for MTEB. The intended long-term canonical benchmark copy is mteb/AfriXNLI.

Transformations

• Filtered the source labels to contradiction and entailment only (label in {0, 2})
• Renamed premise -> sentence1 and hypothesis -> sentence2
• Mapped labels to the binary pair-classification convention used by MTEB
• Preserved the MTEB-facing subset names, including gaz and swh, while sourcing from the original Hub configs
• Removed empty pairs, duplicate pairs, and pair-level label conflicts in the staging copy

Label Schema

• 0: contradiction
• 1: entailment

Splits and subsets

• Language-specific configs are preserved from the benchmark task
• Each config contains the transformed pair-classification validation/test splits used by MTEB

How to evaluate on this task

You can evaluate an embedding model on this dataset using the following code:

import mteb

task = mteb.get_task("AfriXNLI")
evaluator = mteb.MTEB([task])

model = mteb.get_model(YOUR_MODEL)
evaluator.run(model)

To learn more about how to run models on mteb task check out the GitHub repository.

Citation

If you use this dataset, please cite the dataset as well as mteb, as this dataset likely includes additional processing as a part of the MMTEB Contribution.

@article{enevoldsen2025mmtebmassivemultilingualtext,
  title={MMTEB: Massive Multilingual Text Embedding Benchmark},
  author={Kenneth Enevoldsen and Isaac Chung and Imene Kerboua and Márton Kardos and Ashwin Mathur and David Stap and Jay Gala and Wissam Siblini and Dominik Krzemiński and Genta Indra Winata and Saba Sturua and Saiteja Utpala and Mathieu Ciancone and Marion Schaeffer and Gabriel Sequeira and Diganta Misra and Shreeya Dhakal and Jonathan Rystrøm and Roman Solomatin and Ömer Çağatan and Akash Kundu and Martin Bernstorff and Shitao Xiao and Akshita Sukhlecha and Bhavish Pahwa and Rafał Poświata and Kranthi Kiran GV and Shawon Ashraf and Daniel Auras and Björn Plüster and Jan Philipp Harries and Loïc Magne and Isabelle Mohr and Mariya Hendriksen and Dawei Zhu and Hippolyte Gisserot-Boukhlef and Tom Aarsen and Jan Kostkan and Konrad Wojtasik and Taemin Lee and Marek Šuppa and Crystina Zhang and Roberta Rocca and Mohammed Hamdy and Andrianos Michail and John Yang and Manuel Faysse and Aleksei Vatolin and Nandan Thakur and Manan Dey and Dipam Vasani and Pranjal Chitale and Simone Tedeschi and Nguyen Tai and Artem Snegirev and Michael Günther and Mengzhou Xia and Weijia Shi and Xing Han Lù and Jordan Clive and Gayatri Krishnakumar and Anna Maksimova and Silvan Wehrli and Maria Tikhonova and Henil Panchal and Aleksandr Abramov and Malte Ostendorff and Zheng Liu and Simon Clematide and Lester James Miranda and Alena Fenogenova and Guangyu Song and Ruqiya Bin Safi and Wen-Ding Li and Alessia Borghini and Federico Cassano and Hongjin Su and Jimmy Lin and Howard Yen and Lasse Hansen and Sara Hooker and Chenghao Xiao and Vaibhav Adlakha and Orion Weller and Siva Reddy and Niklas Muennighoff},
  publisher = {arXiv},
  journal={arXiv preprint arXiv:2502.13595},
  year={2025},
  url={https://arxiv.org/abs/2502.13595},
  doi = {10.48550/arXiv.2502.13595},
}

@article{muennighoff2022mteb,
  author = {Muennighoff, Niklas and Tazi, Nouamane and Magne, Loïc and Reimers, Nils},
  title = {MTEB: Massive Text Embedding Benchmark},
  publisher = {arXiv},
  journal={arXiv preprint arXiv:2210.07316},
  year = {2022}
  url = {https://arxiv.org/abs/2210.07316},
  doi = {10.48550/ARXIV.2210.07316},
}

Dataset Statistics

Dataset Statistics

The following code contains the descriptive statistics from the task. These can also be obtained using:

import mteb

task = mteb.get_task("AfriXNLI")

desc_stats = task.metadata.descriptive_stats

{
    "test": {
        "num_samples": 7200,
        "unique_pairs": 7197,
        "number_of_characters": 1092291,
        "text1_statistics": {
            "total_text_length": 707366,
            "min_text_length": 14,
            "average_text_length": 98.24527777777777,
            "max_text_length": 324,
            "unique_texts": 3600
        },
        "image1_statistics": null,
        "audio1_statistics": null,
        "text2_statistics": {
            "total_text_length": 384925,
            "min_text_length": 10,
            "average_text_length": 53.46180555555556,
            "max_text_length": 230,
            "unique_texts": 7196
        },
        "image2_statistics": null,
        "audio2_statistics": null,
        "labels_statistics": {
            "min_labels_per_text": 1,
            "average_label_per_text": 1.0,
            "max_labels_per_text": 1,
            "unique_labels": 2,
            "labels": {
                "0": {
                    "count": 3600
                },
                "1": {
                    "count": 3600
                }
            }
        }
    }
}

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This dataset card was automatically generated using MTEB