Finetuned Language Models Are Zero-Shot Learners
Authors: Jason Wei, Maarten Bosma, Vincent Y. Zhao, Kelvin Guu, Adams Wei Yu, Brian Lester, Nan Du, Andrew M. Dai, Quoc V. Le
AI-generated Key Points
- "Finetuned Language Models Are Zero-Shot Learners" explores a method for enhancing zero-shot learning capabilities of language models.
- Fine-tuning language models on diverse tasks described through instructions significantly improves performance on unseen tasks.
- Pretrained language model with 137 billion parameters is instruction-tuned on over 60 NLP tasks using templates.
- Resulting model, FLAN, outperforms unmodified counterpart and GPT-3 on 19 out of 25 evaluated tasks.
- FLAN also surpasses few-shot GPT-3 on benchmark datasets including ANLI, RTE, BoolQ, AI2-ARC, OpenbookQA, and StoryCloze.
- Number of tasks used for instruction tuning and scale of the language model are crucial factors contributing to success.
- Instruction tuning enhances zero-shot learning in language models and highlights importance of task diversity and model scale.
Abstract: This paper explores a simple method for improving the zero-shot learning abilities of language models. We show that instruction tuning -- finetuning language models on a collection of tasks described via instructions -- substantially boosts zero-shot performance on unseen tasks. We take a 137B parameter pretrained language model and instruction-tune it on over 60 NLP tasks verbalized via natural language instruction templates. We evaluate this instruction-tuned model, which we call FLAN, on unseen task types. FLAN substantially improves the performance of its unmodified counterpart and surpasses zero-shot 175B GPT-3 on 19 of 25 tasks that we evaluate. FLAN even outperforms few-shot GPT-3 by a large margin on ANLI, RTE, BoolQ, AI2-ARC, OpenbookQA, and StoryCloze. Ablation studies reveal that number of tasks and model scale are key components to the success of instruction tuning.
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