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MEGAVERSE: Benchmarking Large Language Models Across Languages, Modalities, Models and Tasks

Paper · 2024 · Sanchit Ahuja, Divyanshu Aggarwal, Varun Gumma et al.

Summary

Most LLM evaluation targets English, so it is unclear how recent models handle other languages, especially low-resource ones. MEGAVERSE, built by a Microsoft team, extends their earlier MEGA benchmark with six new datasets: AfriQA, Belebele, IN22, MaRVL, XM-3600 and XRiSAWOZ. The result is a suite of 22 datasets spanning 83 languages, including several low-resource African languages and two multilingual multimodal sets.

The authors run the same evaluation suite on commercial models (GPT-3.5-Turbo, GPT-4, PaLM2, Gemini-Pro) and open models (Llama2, Mistral, Gemma). They also compare vision-language systems: LLaVA variants, GPT-4-Vision and Gemini-Pro-Vision.

Large commercial models consistently beat smaller open ones, and the gap is widest on low-resource languages. GPT-4 leads on the most datasets, and GPT-4-Vision wins on the multimodal tasks. A contamination analysis indicates that nearly all tested models have probably been exposed to some of these public benchmarks.

The work matters for non-English NLP for three reasons. Small open models clearly lag outside English. Tokenizer efficiency tracks performance. Published multilingual scores need contamination checks before they can be trusted.

Key points

  • Coverage: 22 datasets and 83 languages. Tasks include NLI (XNLI, IndicXNLI), QA (TyDiQA-GoldP, MLQA, XQUAD, AfriQA), POS tagging (UDPOS), NER (PAN-X), translation (IN22), summarization (XLSum), task-oriented dialogue (XRiSAWOZ), and Responsible AI (Jigsaw, WinoMT).
  • Text models: nine new models were added (PaLM2, Llama2 7B/13B/70B, two Mistral-v1.0 variants, Gemma 2B/7B, Gemini 1.0 Pro) alongside GPT-4 and GPT-3.5-Turbo.
  • Multimodal models: LLaVA-1.5, ViP-LLaVA, bakLLaVA, GPT-4-Vision and Gemini-Pro-Vision were tested on MaRVL (5 languages) and XM-3600 (20 of its 36 languages).
  • Contamination: the authors applied the Black Box test of Oren et al. (2023) to the 7B instruct versions of Llama2, Mistral and Gemma, with a significance level of 0.001. PAWS-X, XCOPA, XQUAD and XRiSAWOZ came out as contaminated for all three models.
  • Tokenizers and limitations: Latin-script languages such as English and Spanish show low tokenizer fertility, while Telugu and Malayalam show high fertility. Some experiments used only data subsets, and prompt tuning was minimal (no Chain of Thought or translate-test). Not every model was run on every dataset.

Our summary of the paper, in our own words — not its text. The work belongs to its authors; read it at the links above.

 Institutions

Cite

Cite as Sanchit Ahuja, Divyanshu Aggarwal, Varun Gumma, Ishaan Watts, Ashutosh Sathe, Millicent Ochieng, Rishav Hada, Prachi Jain, Mohamed Ahmed, Kalika Bali and Sunayana Sitaram. 2024. MEGAVERSE: Benchmarking Large Language Models Across Languages, Modalities, Models and Tasks. Proceedings of the 2024 Conference of the North American Chapter of the Association for Computational Linguistics: Human Language Technologies (Volume 1: Long Papers).

The paper itself, not this page. BibTeX from the library's record of the work. DOI 10.18653/v1/2024.naacl-long.143

@inproceedings{ahuja2024megaverse,
  title = {{MEGAVERSE: Benchmarking Large Language Models Across Languages, Modalities, Models and Tasks}},
  author = {Sanchit Ahuja, Divyanshu Aggarwal, Varun Gumma, Ishaan Watts, Ashutosh Sathe, Millicent Ochieng, Rishav Hada, Prachi Jain, Mohamed Ahmed, Kalika Bali and Sunayana Sitaram},
  booktitle = {Proceedings of the 2024 Conference of the North American Chapter of the Association for Computational Linguistics: Human Language Technologies (Volume 1: Long Papers)},
  year = {2024},
  doi = {10.18653/v1/2024.naacl-long.143},
  url = {https://doi.org/10.18653/v1/2024.naacl-long.143}
}

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